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Marine geology - Wikipedia

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<span>Methods</span> </div> </a> <button aria-controls="toc-Methods-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Methods subsection</span> </button> <ul id="toc-Methods-sublist" class="vector-toc-list"> <li id="toc-Side-scan_sonar" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Side-scan_sonar"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Side-scan sonar</span> </div> </a> <ul id="toc-Side-scan_sonar-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Multibeam_bathymetry" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Multibeam_bathymetry"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Multibeam bathymetry</span> </div> </a> <ul id="toc-Multibeam_bathymetry-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sub-bottom_profiler" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sub-bottom_profiler"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Sub-bottom profiler</span> </div> </a> <ul id="toc-Sub-bottom_profiler-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Marine_magnetometry" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Marine_magnetometry"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Marine magnetometry</span> </div> </a> <ul id="toc-Marine_magnetometry-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Plate_tectonics" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Plate_tectonics"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Plate tectonics</span> </div> </a> <button aria-controls="toc-Plate_tectonics-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Plate tectonics subsection</span> </button> <ul id="toc-Plate_tectonics-sublist" class="vector-toc-list"> <li id="toc-Mid-ocean_ridge_system" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mid-ocean_ridge_system"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Mid-ocean ridge system</span> </div> </a> <ul id="toc-Mid-ocean_ridge_system-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Subduction_zones" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Subduction_zones"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Subduction zones</span> </div> </a> <ul id="toc-Subduction_zones-sublist" class="vector-toc-list"> <li id="toc-Mariana_Trench" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Mariana_Trench"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2.1</span> <span>Mariana Trench</span> </div> </a> <ul id="toc-Mariana_Trench-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ring_of_Fire" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Ring_of_Fire"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2.2</span> <span>Ring of Fire</span> </div> </a> <ul id="toc-Ring_of_Fire-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Economic_benefits" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Economic_benefits"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Economic benefits</span> </div> </a> <button aria-controls="toc-Economic_benefits-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Economic benefits subsection</span> </button> <ul id="toc-Economic_benefits-sublist" class="vector-toc-list"> <li id="toc-Resource_exploration" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Resource_exploration"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Resource exploration</span> </div> </a> <ul id="toc-Resource_exploration-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Offshore_energy_development" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Offshore_energy_development"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Offshore energy development</span> </div> </a> <ul id="toc-Offshore_energy_development-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Environmental_impacts_and_mitigation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Environmental_impacts_and_mitigation"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Environmental impacts and mitigation</span> </div> </a> <button aria-controls="toc-Environmental_impacts_and_mitigation-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Environmental impacts and mitigation subsection</span> </button> <ul id="toc-Environmental_impacts_and_mitigation-sublist" class="vector-toc-list"> <li id="toc-Habitat_mapping_and_conservation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Habitat_mapping_and_conservation"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Habitat mapping and conservation</span> </div> </a> <ul id="toc-Habitat_mapping_and_conservation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sediment_transportation_and_coastal_erosion" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sediment_transportation_and_coastal_erosion"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Sediment transportation and coastal erosion</span> </div> </a> <ul id="toc-Sediment_transportation_and_coastal_erosion-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Natural_hazard_assessment" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Natural_hazard_assessment"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Natural hazard assessment</span> </div> </a> <ul id="toc-Natural_hazard_assessment-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Future_research" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Future_research"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Future research</span> </div> </a> <button aria-controls="toc-Future_research-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Future research subsection</span> </button> <ul id="toc-Future_research-sublist" class="vector-toc-list"> <li id="toc-Seafloor_mapping_and_bathymetry" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Seafloor_mapping_and_bathymetry"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Seafloor mapping and bathymetry</span> </div> </a> <ul id="toc-Seafloor_mapping_and_bathymetry-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sources" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sources"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Sources</span> </div> </a> <ul id="toc-Sources-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Marine geology</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 38 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-38" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">38 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B9%D9%84%D9%85_%D8%A7%D9%84%D9%85%D8%AD%D9%8A%D8%B7%D8%A7%D8%AA_%D8%A7%D9%84%D8%AC%D9%8A%D9%88%D9%84%D9%88%D8%AC%D9%8A%D8%A9" title="علم المحيطات الجيولوجية – Arabic" lang="ar" hreflang="ar" data-title="علم المحيطات الجيولوجية" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/D%C9%99niz_geologiyas%C4%B1" title="Dəniz geologiyası – Azerbaijani" lang="az" hreflang="az" data-title="Dəniz geologiyası" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9C%D0%BE%D1%80%D1%81%D0%BA%D0%B0_%D0%B3%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F" title="Морска геология – Bulgarian" lang="bg" hreflang="bg" data-title="Морска геология" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Morska_geologija" title="Morska geologija – Bosnian" lang="bs" hreflang="bs" data-title="Morska geologija" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Geologia_marina" title="Geologia marina – Catalan" lang="ca" hreflang="ca" data-title="Geologia marina" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Mo%C5%99sk%C3%A1_geologie" title="Mořská geologie – Czech" lang="cs" hreflang="cs" data-title="Mořská geologie" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Maringeologi" title="Maringeologi – Danish" lang="da" hreflang="da" data-title="Maringeologi" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Meeresgeologie" title="Meeresgeologie – German" lang="de" hreflang="de" data-title="Meeresgeologie" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Meregeoloogia" title="Meregeoloogia – Estonian" lang="et" hreflang="et" data-title="Meregeoloogia" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%93%CE%B5%CF%89%CE%BB%CE%BF%CE%B3%CE%B9%CE%BA%CE%AE_%CF%89%CE%BA%CE%B5%CE%B1%CE%BD%CE%BF%CE%B3%CF%81%CE%B1%CF%86%CE%AF%CE%B1" title="Γεωλογική ωκεανογραφία – Greek" lang="el" hreflang="el" data-title="Γεωλογική ωκεανογραφία" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Geolog%C3%ADa_marina" title="Geología marina – Spanish" lang="es" hreflang="es" data-title="Geología marina" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B2%D9%85%DB%8C%D9%86%E2%80%8C%D8%B4%D9%86%D8%A7%D8%B3%DB%8C_%D8%AF%D8%B1%DB%8C%D8%A7%DB%8C%DB%8C" title="زمین‌شناسی دریایی – Persian" lang="fa" hreflang="fa" data-title="زمین‌شناسی دریایی" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/G%C3%A9ologie_marine" title="Géologie marine – French" lang="fr" hreflang="fr" data-title="Géologie marine" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%95%B4%EC%96%91%EC%A7%80%EC%A7%88%ED%95%99" title="해양지질학 – Korean" lang="ko" hreflang="ko" data-title="해양지질학" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Morska_geologija" title="Morska geologija – Croatian" lang="hr" hreflang="hr" data-title="Morska geologija" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Geologi_kelautan" title="Geologi kelautan – Indonesian" lang="id" hreflang="id" data-title="Geologi kelautan" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Geologia_marina" title="Geologia marina – Italian" lang="it" hreflang="it" data-title="Geologia marina" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%92%D7%90%D7%95%D7%9C%D7%95%D7%92%D7%99%D7%94_%D7%99%D7%9E%D7%99%D7%AA" title="גאולוגיה ימית – Hebrew" lang="he" hreflang="he" data-title="גאולוגיה ימית" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B8%E0%B2%BE%E0%B2%97%E0%B2%B0_%E0%B2%AD%E0%B3%82%E0%B2%B5%E0%B2%BF%E0%B2%9C%E0%B3%8D%E0%B2%9E%E0%B2%BE%E0%B2%A8" title="ಸಾಗರ ಭೂವಿಜ್ಞಾನ – Kannada" lang="kn" hreflang="kn" data-title="ಸಾಗರ ಭೂವಿಜ್ಞಾನ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%96%E1%83%A6%E1%83%95%E1%83%98%E1%83%A1_%E1%83%92%E1%83%94%E1%83%9D%E1%83%9A%E1%83%9D%E1%83%92%E1%83%98%E1%83%90" title="ზღვის გეოლოგია – Georgian" lang="ka" hreflang="ka" data-title="ზღვის გეოლოგია" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B8%E0%A4%BE%E0%A4%97%E0%A4%B0%E0%A5%80_%E0%A4%AD%E0%A5%82%E0%A4%97%E0%A5%8B%E0%A4%B2" title="सागरी भूगोल – Marathi" lang="mr" hreflang="mr" data-title="सागरी भूगोल" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/H%C4%81i-i%C3%B2ng_D%C3%AA-c%C3%A9k-h%C5%8Fk" title="Hāi-iòng Dê-cék-hŏk – Mindong" lang="cdo" hreflang="cdo" data-title="Hāi-iòng Dê-cék-hŏk" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B5%B7%E6%B4%8B%E5%9C%B0%E8%B3%AA%E5%AD%A6" title="海洋地質学 – Japanese" lang="ja" hreflang="ja" data-title="海洋地質学" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Maringeologi" title="Maringeologi – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Maringeologi" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Maringeologi" title="Maringeologi – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Maringeologi" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Dengiz_geologiyasi" title="Dengiz geologiyasi – Uzbek" lang="uz" hreflang="uz" data-title="Dengiz geologiyasi" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Geologia_morza" title="Geologia morza – Polish" lang="pl" hreflang="pl" data-title="Geologia morza" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Geologia_marinha" title="Geologia marinha – Portuguese" lang="pt" hreflang="pt" data-title="Geologia marinha" data-language-autonym="Português" 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class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Study of the history and structure of the ocean floor</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Marine Geology" redirects here. For the scientific journal, see <a href="/wiki/Marine_Geology_(journal)" title="Marine Geology (journal)">Marine Geology (journal)</a>.</div> <p><b>Marine geology</b> or <b>geological oceanography</b> is the study of the history and structure of the ocean floor. It involves <a href="/wiki/Geophysical" class="mw-redirect" title="Geophysical">geophysical</a>, <a href="/wiki/Geochemistry" title="Geochemistry">geochemical</a>, <a href="/wiki/Sedimentology" title="Sedimentology">sedimentological</a> and <a href="/wiki/Paleontological" class="mw-redirect" title="Paleontological">paleontological</a> investigations of the <a href="/wiki/Ocean_floor" class="mw-redirect" title="Ocean floor">ocean floor</a> and <a href="/wiki/Coastal_zone" class="mw-redirect" title="Coastal zone">coastal zone</a>. Marine geology has strong ties to <a href="/wiki/Geophysics" title="Geophysics">geophysics</a> and to <a href="/wiki/Physical_oceanography" title="Physical oceanography">physical oceanography</a>. </p><p>Marine geological studies were of extreme importance in providing the critical evidence for <a href="/wiki/Sea_floor_spreading" class="mw-redirect" title="Sea floor spreading">sea floor spreading</a> and <a href="/wiki/Plate_tectonics" title="Plate tectonics">plate tectonics</a> in the years following World War II. The deep ocean floor is the last essentially unexplored frontier and detailed mapping in support of economic (<a href="/wiki/Petroleum" title="Petroleum">petroleum</a> and <a href="/wiki/Metal" title="Metal">metal</a> <a href="/wiki/Mining" title="Mining">mining</a>), natural disaster mitigation, and academic objectives. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The study of marine geology dates back to the late 1800s during the 4-year HMS <a href="/wiki/Challenger_expedition" title="Challenger expedition"><i>Challenger</i> expedition</a>.<sup id="cite_ref-:02_1-0" class="reference"><a href="#cite_note-:02-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:12_2-0" class="reference"><a href="#cite_note-:12-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> HMS <i>Challenger</i> hosted nearly 250 people, including sailors, engineers, carpenters, marines, officers, and a 6-person team of scientists, led by <a href="/wiki/Charles_Wyville_Thomson" title="Charles Wyville Thomson">Charles Wyville Thomson</a>.<sup id="cite_ref-:02_1-1" class="reference"><a href="#cite_note-:02-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:22_3-0" class="reference"><a href="#cite_note-:22-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> The scientists' goal was to prove that there was life in the deepest parts of the ocean.<sup id="cite_ref-:22_3-1" class="reference"><a href="#cite_note-:22-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Using a sounding rope, dropped over the edge of the ship, the team was able to capture ample amounts of data. Part of their discovery was that the deepest part of the ocean was not in the middle.<sup id="cite_ref-:12_2-1" class="reference"><a href="#cite_note-:12-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> These were some of the first records of the mid-ocean ridge system.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2024)">citation needed</span></a></i>&#93;</sup> </p><p>Prior to World War II, marine geology grew as a scientific discipline. During the early 20th century, organizations such as the <a href="/wiki/Scripps_Institution_of_Oceanography" title="Scripps Institution of Oceanography">Scripps Institution of Oceanography</a> and the <a href="/wiki/Woods_Hole_Oceanographic_Institution" title="Woods Hole Oceanographic Institution">Woods Hole Oceanographic Institution</a> (WHOI) were created to support efforts in the field.<sup id="cite_ref-:32_4-0" class="reference"><a href="#cite_note-:32-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:42_5-0" class="reference"><a href="#cite_note-:42-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> With Scripps being located on the west coast of North America and WHOI on the east coast, the study of marine geology became much more accessible.<sup id="cite_ref-:32_4-1" class="reference"><a href="#cite_note-:32-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:42_5-1" class="reference"><a href="#cite_note-:42-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> </p><p>In the 1950s, marine geology had one of the most significant discoveries, the <a href="/wiki/Mid-ocean_ridge" title="Mid-ocean ridge">mid-ocean ridge</a> system. After ships were equipped with sonar sensors, they travelled back and forth across the Atlantic Ocean collecting observations of the sea floor.<sup id="cite_ref-:52_6-0" class="reference"><a href="#cite_note-:52-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> In 1953, the cartographer <a href="/wiki/Marie_Tharp" title="Marie Tharp">Marie Tharp</a> generated the first three-dimensional relief map of the ocean floor which proved there was an underwater mountain range in the middle of the Atlantic, along with the <a href="/wiki/Mid-Atlantic_Ridge" title="Mid-Atlantic Ridge">Mid-Atlantic Ridge</a>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> The survey data was large step towards many more discoveries about the geology of the sea.<sup id="cite_ref-:52_6-1" class="reference"><a href="#cite_note-:52-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg/220px-Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg.png" decoding="async" width="220" height="156" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg/330px-Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg/440px-Oceanic.Stripe.Magnetic.Anomalies.Scheme.svg.png 2x" data-file-width="1052" data-file-height="744" /></a><figcaption>A theoretical model of the formation of magnetic striping. New oceanic crust forming continuously at the crest of the mid-ocean ridge cools and becomes increasingly older as it moves away from the ridge crest with seafloor spreading.</figcaption></figure> <p>In 1960, the American geophysicist <a href="/wiki/Harry_Hammond_Hess" title="Harry Hammond Hess">Harry H. Hess</a> hypothesized that the seafloor was spreading from the mid-ocean ridge system.<sup id="cite_ref-:52_6-2" class="reference"><a href="#cite_note-:52-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> With support from the maps of the sea floor, and the recently developed theory of plate tectonics and <a href="/wiki/Continental_drift" title="Continental drift">continental drift</a>, Hess was able to prove that the <a href="/wiki/Earth%27s_mantle" title="Earth&#39;s mantle">Earth's mantle</a> continuously released molten rock from the mid-ocean ridge and that the molten rock then solidified, causing the boundary between the two <a href="/wiki/Plate_tectonics" title="Plate tectonics">tectonic plates</a> to <a href="/wiki/Divergent_boundary" title="Divergent boundary">diverge</a>.<sup id="cite_ref-:11_8-0" class="reference"><a href="#cite_note-:11-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> A geomagnetic survey was conducted that supported this theory. The survey was composed of scientists using <a href="/wiki/Magnetometer" title="Magnetometer">magnetometers</a> to measure the magnetism of the <a href="/wiki/Basalt_Rocks" title="Basalt Rocks">basalt rock</a> protruding from the mid-ocean ridge.<sup id="cite_ref-:52_6-3" class="reference"><a href="#cite_note-:52-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:62_9-0" class="reference"><a href="#cite_note-:62-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> They discovered that on either side of the ridge, symmetrical "strips" were found as the polarity of the planet would change over time.<sup id="cite_ref-:52_6-4" class="reference"><a href="#cite_note-:52-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:62_9-1" class="reference"><a href="#cite_note-:62-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> This proved that <a href="/wiki/Seafloor_spreading" title="Seafloor spreading">seafloor spreading</a> existed. In later years, newer technology was able to date the rocks and identified that rocks closest to the ridge were younger than the rocks near the coasts of the <a href="/wiki/Western_Hemisphere" title="Western Hemisphere">Western</a> and <a href="/wiki/Eastern_Hemisphere" title="Eastern Hemisphere">Eastern Hemispheres</a> land. </p><p>At present, marine geology focuses on geological hazards, environmental conditions, habitats, natural resources, and energy and mining projects.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Methods">Methods</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=2" title="Edit section: Methods"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are multiple methods for collecting data from the sea floor without physically dispatching humans or machines to the bottom of the ocean. </p> <div class="mw-heading mw-heading3"><h3 id="Side-scan_sonar">Side-scan sonar</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=3" title="Edit section: Side-scan sonar"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A common method of collecting imagery of the sea floor is <a href="/wiki/Side-scan_sonar" title="Side-scan sonar">side-scan sonar</a>.<sup id="cite_ref-:72_11-0" class="reference"><a href="#cite_note-:72-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:82_12-0" class="reference"><a href="#cite_note-:82-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Developed in the late 1960s, the purpose of the survey method is to use active sonar systems on the sea floor to detect and develop images of objects.<sup id="cite_ref-:72_11-1" class="reference"><a href="#cite_note-:72-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> The physical sensors of the sonar device are known as a transducer array and they are mounted onto the hull of a vessel which sends acoustic pulses that reflect off the seafloor and received by the sensors. The imaging can help determine the seafloors composition as harder objects generate a stronger reflectance and appear dark on the returned image. Softer materials such as sand and mud cannot reflect the arrays pulses as well so they appear lighter on the image. This information can be analyzed by specialist to determine <a href="/wiki/Outcrop" title="Outcrop">outcrops</a> of rock beneath the surface of the water.<sup id="cite_ref-:82_12-1" class="reference"><a href="#cite_note-:82-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p><p>This method is less expensive than releasing a vehicle to take photographs of the sea floor, and requires less time.<sup id="cite_ref-:82_12-2" class="reference"><a href="#cite_note-:82-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> The side-scan sonar is useful for scientists as it is a quick and efficient way of collecting imagery of the sea floor, but it cannot measure other factors, such as depth.<sup id="cite_ref-:72_11-2" class="reference"><a href="#cite_note-:72-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:82_12-3" class="reference"><a href="#cite_note-:82-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Therefore, other depth measuring sonar devices are typically accompanied with the side-scan sonar to generate a more detailed survey.<sup id="cite_ref-:72_11-3" class="reference"><a href="#cite_note-:72-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Multibeam_bathymetry">Multibeam bathymetry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=4" title="Edit section: Multibeam bathymetry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Similarly to side-scan sonar, multibeam bathymetry uses a transducer array to send and receive sound waves in order to detect objects located on the sea floor.<sup id="cite_ref-:92_13-0" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Unlike side-scan sonar, scientists are able to determine multiple types of measurements from the recordings and make hypothesis' on the data collected. By understanding the speed at which sound will travel in the water, scientists can calculate the two way travel time from the ship's sensor to the seafloor and back to the ship. These calculations will determine to depth of the sea floor in that area.<sup id="cite_ref-:92_13-1" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Uracas_3d_hires.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Uracas_3d_hires.jpg/220px-Uracas_3d_hires.jpg" decoding="async" width="220" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Uracas_3d_hires.jpg/330px-Uracas_3d_hires.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Uracas_3d_hires.jpg/440px-Uracas_3d_hires.jpg 2x" data-file-width="3013" data-file-height="2054" /></a><figcaption>EM300 bathymetry of the three submarine volcanoes in the vicinity of Farallon de Pajaros Island. The data were collected using the EM300 multibeam system mounted on the hull of the R/V Thompson. The grid-cell size is 35 meters. The image is 2 times vertically exaggerated.</figcaption></figure> <p><a href="/wiki/Backscatter" title="Backscatter">Backscatter</a> is another measurement used to determine the intensity of the sound that is returned to the sensor.<sup id="cite_ref-:92_13-2" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> This information can provide insight on the geological makeup and objects of the sea floor as well as objects located within the <a href="/wiki/Water_column" title="Water column">water column</a>. Objects in the water column can include structures from shipwrecks, dense biology, and bubble plumes. The importance of objects in the water column to marine geology is identifying specific features as bubble plumes can indicate the presence of <a href="/wiki/Hydrothermal_vent" title="Hydrothermal vent">hydrothermal vents</a> and <a href="/wiki/Cold_seep" title="Cold seep">cold seeps</a>.<sup id="cite_ref-:92_13-3" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p><p>There are limitations to this technique. The distance between the sea floor and the sensor is related to the resolution of the map being created.<sup id="cite_ref-:92_13-4" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> The closer the sensor is the sea floor, the higher the resolution will be and the farther away the sensor is to the sea floor, the lower the resolution will be. Therefore, it is common for <a href="/wiki/Remotely_operated_underwater_vehicle" title="Remotely operated underwater vehicle">remotely operated vehicles</a> (ROVs) and <a href="/wiki/Autonomous_underwater_vehicle" title="Autonomous underwater vehicle">autonomous underwater vehicles</a> (AUVs) to be equipped with the multibeam sensor or for the sensor to be towed by the ship its self. This ensures that the resolution of the collected data will be high enough for proper analysis.<sup id="cite_ref-:92_13-5" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Sub-bottom_profiler">Sub-bottom profiler</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=5" title="Edit section: Sub-bottom profiler"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A sub-bottom profiler is another sonar system used in <a href="/wiki/Geophysical_survey" title="Geophysical survey">geophysical surveys</a> of the sea floor to not only map depth, but also to map beneath the sea floor.<sup id="cite_ref-:102_14-0" class="reference"><a href="#cite_note-:102-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Mounted to the hull of a ship, the system releases low-frequency pulses which penetrate the surface of the sea floor and are reflected by sediments in the sub-surface. Some sensors can reach over 1000 meters below the surface of the sea floor, giving hydrographers a detailed view of the marine geological environment.<sup id="cite_ref-:12_2-2" class="reference"><a href="#cite_note-:12-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> </p><p>Many sub-bottom profilers can emit multiple frequencies of sound to record data on a multitude of <a href="/wiki/Sediment" title="Sediment">sediments</a> and objects on and below the sea floor. The returned data is collected by computers and with aid from hydrographers, can create <a href="/wiki/Cross_section_(geology)" title="Cross section (geology)">cross-sections</a> of the terrain below the sea floor.<sup id="cite_ref-:102_14-1" class="reference"><a href="#cite_note-:102-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> The resolution of the data also allows scientists to identify geological features such as <a href="/wiki/Volcanic_Ridge" title="Volcanic Ridge">volcanic ridges</a>, <a href="/wiki/Submarine_landslide" title="Submarine landslide">underwater landslides</a>, ancient river beds, and other features.<sup id="cite_ref-:102_14-2" class="reference"><a href="#cite_note-:102-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> </p><p>The benefit of the sub-bottom profiler is its capability to record information on the surface and below the seafloor. When accompanied with geophysical data from <a href="/wiki/Multibeam_echosounder" title="Multibeam echosounder">multibeam sonar</a> and physical data from rock and <a href="/wiki/Core_sample" title="Core sample">core samples</a>, the sub-bottom profiles delivers insights on the location and morphology of submarine landslide, identifies how oceanic gasses travel through the subsurface, discover artifacts from cultural heritages, understand sediment deposition, and more.<sup id="cite_ref-:102_14-3" class="reference"><a href="#cite_note-:102-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Marine_magnetometry">Marine magnetometry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=6" title="Edit section: Marine magnetometry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Magnetometer2004USNavy.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Magnetometer2004USNavy.jpg/220px-Magnetometer2004USNavy.jpg" decoding="async" width="220" height="332" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Magnetometer2004USNavy.jpg/330px-Magnetometer2004USNavy.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Magnetometer2004USNavy.jpg/440px-Magnetometer2004USNavy.jpg 2x" data-file-width="1632" data-file-height="2464" /></a><figcaption>A magnetometer used by the United States Navy in 2004.</figcaption></figure> <p>Magnetometry is the process of measuring changes in the <a href="/wiki/Earth%27s_magnetic_field" title="Earth&#39;s magnetic field">Earth's magnetic field</a>.<sup id="cite_ref-:13_15-0" class="reference"><a href="#cite_note-:13-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> The outer layer of the Earth's core is liquid and mostly made up of magnetic <a href="/wiki/Iron" title="Iron">iron</a> and <a href="/wiki/Nickel" title="Nickel">nickel</a>.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> When the Earth turns on its axis, the metals release electrical currents which generate magnetic fields.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> These fields can then be measured to reveal geological subseafloor structures.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> This method is especially useful in marine exploration and <a href="/wiki/Geology" title="Geology">geology</a> as it can not only characterize geological features on the seafloor but can survey aircraft and ship wrecks deep under the sea.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> </p><p>A <a href="/wiki/Magnetometer" title="Magnetometer">magnetometer</a> is the main piece of equipment deployed, which is typically towed behind a vessel or mounted to a <a href="/wiki/Autonomous_underwater_vehicle" title="Autonomous underwater vehicle">AUV</a>. It is able to measure the changes in fields of <a href="/wiki/Magnetism" title="Magnetism">magnetism</a> and corresponding geolocation to create maps.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/Magnetometer" title="Magnetometer">magnetometer</a> evaluates the magnetic presence generally every second, or one <a href="/wiki/Hertz" title="Hertz">hertz</a>, but can be calibrated to measure at different speeds depending on the study. The readings will be consistent until the device detects <a href="/wiki/Ferrous" title="Ferrous">ferrous</a> material.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> This could range from a <a href="/wiki/Hull_(watercraft)" title="Hull (watercraft)">ship's hull</a> to ferrous <a href="/wiki/Basalt" title="Basalt">basalt</a> at the seafloor. The sudden change in magnetism can be analyzed on the magnetometer's display.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> </p><p>The benefit to a magnetometer compared to sonar devices is its ability to detect artifacts and geological features on top and underneath the seafloor.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Because the magnetometer is a passive sensor, and does not emit waves, its exploration depth is unlimited.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Although, in most studies, the resolution and certainty of the data collected is dependent on the distance from the device. The closer the device is to a ferrous object, the better the data collected. </p> <div class="mw-heading mw-heading2"><h2 id="Plate_tectonics">Plate tectonics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=7" title="Edit section: Plate tectonics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Tectonic_plates_(2022).svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Tectonic_plates_%282022%29.svg/334px-Tectonic_plates_%282022%29.svg.png" decoding="async" width="334" height="170" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Tectonic_plates_%282022%29.svg/501px-Tectonic_plates_%282022%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/67/Tectonic_plates_%282022%29.svg/668px-Tectonic_plates_%282022%29.svg.png 2x" data-file-width="1920" data-file-height="975" /></a><figcaption>Map of Earth's principal <a href="/wiki/Plate_tectonics" title="Plate tectonics">tectonic plates</a>.</figcaption></figure><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Plate_tectonics" title="Plate tectonics">Plate tectonics</a></div> <p>Plate tectonics is a scientific theory developed in the 1960s that explains major land form events, such as <a href="/wiki/Mountain_formation" title="Mountain formation">mountain building</a>, <a href="/wiki/Volcano" title="Volcano">volcanoes</a>, <a href="/wiki/Earthquake" title="Earthquake">earthquakes</a>, and mid-ocean ridge systems.<sup id="cite_ref-:14_26-0" class="reference"><a href="#cite_note-:14-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> The idea is that Earth's most outer layer, known as the <a href="/wiki/Lithosphere" title="Lithosphere">lithosphere</a>, that is made up of the <a href="/wiki/Crust_(geology)" title="Crust (geology)">crust</a> and <a href="/wiki/Mantle_(geology)" title="Mantle (geology)">mantle</a> is divided into extensive plates of rock.<sup id="cite_ref-:11_8-1" class="reference"><a href="#cite_note-:11-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:14_26-1" class="reference"><a href="#cite_note-:14-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> These plates sit on top of partially molten layer of rock known as the <a href="/wiki/Asthenosphere" title="Asthenosphere">asthenosphere</a> and move relative to each other due to convection between the asthenosphere and lithosphere.<sup id="cite_ref-:14_26-2" class="reference"><a href="#cite_note-:14-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> The speed at which the plates move ranges between 2 and 15 centimeters per year. Why this theory is so significant is the interaction between the tectonic plates explains many geological formations.<sup id="cite_ref-:11_8-2" class="reference"><a href="#cite_note-:11-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> In regards to marine geology, the movement of the plates explains <a href="/wiki/Seafloor_spreading" title="Seafloor spreading">seafloor spreading</a> and mid-ocean ridge systems, <a href="/wiki/Subduction" title="Subduction">subduction zones</a> and trenches, volcanism and hydrothermal vents, and more. </p><p>There are three major types of tectonic plate boundaries; <a href="/wiki/Divergent_boundary" title="Divergent boundary">divergent</a>, <a href="/wiki/Convergent_boundary" title="Convergent boundary">convergent</a>, and <a href="/wiki/Transform_fault" title="Transform fault">transform boundaries</a>.<sup id="cite_ref-:15_27-0" class="reference"><a href="#cite_note-:15-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> Divergent plate boundaries are when two tectonic plates move away from each other, convergent plate boundaries are when two plates move towards each other, and transform plate boundaries are when two plates slide sideways past each other. Each boundary type is associated with different geological marine features. Divergent plates are the cause for mid-ocean ridge systems while convergent plates are responsible for subduction zones and the creation of deep ocean trenches. Transform boundaries cause earthquakes, displacement of rock, and crustal deformation.<sup id="cite_ref-:11_8-3" class="reference"><a href="#cite_note-:11-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:15_27-1" class="reference"><a href="#cite_note-:15-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:14_26-3" class="reference"><a href="#cite_note-:14-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Mid-ocean_ridge_system">Mid-ocean ridge system</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=8" title="Edit section: Mid-ocean ridge system"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Divergent plates are directly responsible for the largest mountain range on Earth, known as the mid-ocean ridge system.<sup id="cite_ref-:16_29-0" class="reference"><a href="#cite_note-:16-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup> At nearly 60,000&#160;km long, the mid-ocean ridge is an extensive chain of underwater volcanic mountains that spans the globe.<sup id="cite_ref-:17_30-0" class="reference"><a href="#cite_note-:17-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> Centralized in the oceans, this unique geological formation houses a collection of <a href="/wiki/Ridge" title="Ridge">ridges</a>, rifts, <a href="/wiki/Fault_(geology)" title="Fault (geology)">fault zones</a>, and other geological features.<sup id="cite_ref-:16_29-1" class="reference"><a href="#cite_note-:16-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:17_30-1" class="reference"><a href="#cite_note-:17-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> </p><p>The <a href="/wiki/Mid-Atlantic_Ridge" title="Mid-Atlantic Ridge">Mid-Atlantic Ridge</a> is a consequence of the diverging <a href="/wiki/North_American_Plate" class="mw-redirect" title="North American Plate">North American</a> and <a href="/wiki/Eurasian_Plate" class="mw-redirect" title="Eurasian Plate">Eurasian</a>, and the <a href="/wiki/African_Plate" class="mw-redirect" title="African Plate">African</a> and <a href="/wiki/South_American_Plate" class="mw-redirect" title="South American Plate">South American Plates</a>.<sup id="cite_ref-:18_31-0" class="reference"><a href="#cite_note-:18-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> It began forming over 200 million years ago when the American, African and European continents were still connected, forming the <a href="/wiki/Pangaea" title="Pangaea">Pangea</a>.<sup id="cite_ref-:19_32-0" class="reference"><a href="#cite_note-:19-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup> After <a href="/wiki/Continental_drift" title="Continental drift">continental drift</a>, the ridge system became more defined and in the last 75 years, it has been intensely studied. The <a href="/wiki/Mid-Atlantic_Ridge" title="Mid-Atlantic Ridge">Mid-Atlantic Ridge</a> was also served as the birthplace for the discovery of <a href="/wiki/Seafloor_spreading" title="Seafloor spreading">seafloor spreading</a>.<sup id="cite_ref-:20_33-0" class="reference"><a href="#cite_note-:20-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> As volcanic activity produces new <a href="/wiki/Oceanic_crust" title="Oceanic crust">oceanic crust</a> along the ridge, the two plates diverge from each other pulling up the new ocean floor from below the crust.<sup id="cite_ref-:18_31-1" class="reference"><a href="#cite_note-:18-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:19_32-1" class="reference"><a href="#cite_note-:19-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:20_33-1" class="reference"><a href="#cite_note-:20-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> Along the <a href="/wiki/Continent-ocean_boundary" title="Continent-ocean boundary">ocean-continent</a> border of the tectonic plates, the oceanic plates subduct underneath the continental plates, creating some of the deepest marine trenches in the world </p> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Subduction-en.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Subduction-en.svg/416px-Subduction-en.svg.png" decoding="async" width="416" height="240" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Subduction-en.svg/624px-Subduction-en.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Subduction-en.svg/832px-Subduction-en.svg.png 2x" data-file-width="1482" data-file-height="854" /></a><figcaption>Diagram of the <a href="/wiki/Geology" title="Geology">geological</a> process of <a href="/wiki/Subduction" title="Subduction">subduction</a>.</figcaption></figure> <div class="mw-heading mw-heading3"><h3 id="Subduction_zones">Subduction zones</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=9" title="Edit section: Subduction zones"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Subduction" title="Subduction">Subduction zones</a> are caused when two tectonic plates <a href="/wiki/Convergent_boundary" title="Convergent boundary">converge</a> on each other and one plate is pushed beneath the other.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> In a marine setting, this typically occurs when the <a href="/wiki/Oceanic_crust" title="Oceanic crust">oceanic crust</a> subducts below the <a href="/wiki/Continental_crust" title="Continental crust">continental crust</a>, resulting in volcanic activity and the development of deep ocean trenches.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> Marine geology focuses on mapping and understanding how these processes function. Renowned geological features created through subduction zones include the <a href="/wiki/Mariana_Trench" title="Mariana Trench">Mariana Trench</a> and the <a href="/wiki/Ring_of_Fire" title="Ring of Fire">Ring of Fire</a>.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Mariana_Trench">Mariana Trench</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=10" title="Edit section: Mariana Trench"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Mariana Trench is the deepest known submarine trench, and the deepest location in the Earth's crust itself.<sup id="cite_ref-:21_38-0" class="reference"><a href="#cite_note-:21-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> It is a <a href="/wiki/Subduction_zone" class="mw-redirect" title="Subduction zone">subduction zone</a> where the <a href="/wiki/Pacific_Plate" class="mw-redirect" title="Pacific Plate">Pacific Plate</a> is being subducted under the <a href="/wiki/Mariana_Plate" class="mw-redirect" title="Mariana Plate">Mariana Plate</a>.<sup id="cite_ref-:22_3-2" class="reference"><a href="#cite_note-:22-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> At the deepest point, the trench is nearly 11,000 m deep (almost 36,000 feet).<sup id="cite_ref-:21_38-1" class="reference"><a href="#cite_note-:21-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:22_3-3" class="reference"><a href="#cite_note-:22-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> This is further below sea level than <a href="/wiki/Mount_Everest" title="Mount Everest">Mount Everest</a> is above sea level, by over 2 kilometers. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Pacific_Ring_of_Fire.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Pacific_Ring_of_Fire.svg/220px-Pacific_Ring_of_Fire.svg.png" decoding="async" width="220" height="133" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/52/Pacific_Ring_of_Fire.svg/330px-Pacific_Ring_of_Fire.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/52/Pacific_Ring_of_Fire.svg/440px-Pacific_Ring_of_Fire.svg.png 2x" data-file-width="942" data-file-height="569" /></a><figcaption>Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the so-called Pacific Ring of fire, a zone of frequent earthquakes and volcanic eruptions.</figcaption></figure> <div class="mw-heading mw-heading4"><h4 id="Ring_of_Fire">Ring of Fire</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=11" title="Edit section: Ring of Fire"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Ring of Fire is situated around the <a href="/wiki/Pacific_Ocean" title="Pacific Ocean">Pacific Ocean</a>, created from several converging plate boundaries.<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> Its intense <a href="/wiki/Volcanism" title="Volcanism">volcanism</a> and <a href="/wiki/Seismic" class="mw-redirect" title="Seismic">seismic</a> activity poses a major threat for disastrous earthquakes, <a href="/wiki/Tsunami" title="Tsunami">tsunamis</a>, and volcanic eruptions.<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> Any <a href="/wiki/Early_warning_system" title="Early warning system">early warning systems</a> and mitigation techniques for these disastrous events will require marine geology of coastal and <a href="/wiki/Island_arc" title="Island arc">island arc</a> environments to predict events.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Economic_benefits">Economic benefits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=12" title="Edit section: Economic benefits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Resource_exploration">Resource exploration</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=13" title="Edit section: Resource exploration"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Marine geology has several methods of detecting geological features below the sea.<sup id="cite_ref-:12_2-3" class="reference"><a href="#cite_note-:12-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:92_13-6" class="reference"><a href="#cite_note-:92-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:102_14-4" class="reference"><a href="#cite_note-:102-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:13_15-1" class="reference"><a href="#cite_note-:13-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> One of the economic benefits of geological surveying of the seafloor is determining valuable resources that can be extracted.<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> The two major resources <a href="/wiki/Deep_sea_mining" title="Deep sea mining">mined</a> at sea include oil and minerals. Over the last 30 years, deep-sea mining has generated between $9 -$11 billion <a href="/wiki/United_States_dollar" title="United States dollar">USD</a> in the <a href="/wiki/United_States" title="United States">United States of America</a>.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> Although this sector seems profitable, it is a high risk, high reward industry with many harmful environmental impacts.<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> </p><p>Some of the major minerals extracted from the sea include nickel, <a href="/wiki/Copper" title="Copper">copper</a>, <a href="/wiki/Cobalt" title="Cobalt">cobalt</a>, <a href="/wiki/Manganese" title="Manganese">manganese</a>, <a href="/wiki/Zinc" title="Zinc">zinc</a>, <a href="/wiki/Gold" title="Gold">gold</a>, and other metals.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> These minerals are commonly formed around <a href="/wiki/Volcanism" title="Volcanism">volcanic activity</a>, more specifically hydrothermal vents and <a href="/wiki/Manganese_nodule" title="Manganese nodule">polymetallic nodules</a>.<sup id="cite_ref-47" class="reference"><a href="#cite_note-47"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> These vents emit large volumes of super-heated, metal infused fluids that rise and rapidly cool when mixed with the cold <a href="/wiki/Seawater" title="Seawater">seawater</a>. The <a href="/wiki/Chemical_reaction" title="Chemical reaction">chemical reaction</a> causes <a href="/wiki/Sulfur" title="Sulfur">sulfur</a> and minerals to <a href="/wiki/Precipitation_(chemistry)" title="Precipitation (chemistry)">precipitate</a> and from chimneys, towers, and mineral-rich deposits on the sea floor.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Manganese_nodule" title="Manganese nodule">Polymetallic nodules</a>, also known as <a href="/wiki/Manganese_nodule" title="Manganese nodule">manganese nodules</a>, are rounded <a href="/wiki/Ore" title="Ore">ores</a> formed over millions of years from precipitating metals from seawater and sediment pore water.<sup id="cite_ref-:23_50-0" class="reference"><a href="#cite_note-:23-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> They are typically found unattached, spread across the abyssal seafloor and contain metals crucial for building batteries and touch screens, including cobalt, nickel, copper, and manganese.<sup id="cite_ref-:23_50-1" class="reference"><a href="#cite_note-:23-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original(1).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg/220px-2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg/330px-2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e9/2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg/440px-2015-04-14_18-20-14_Sonne_SO239_157ROV11_Logo_original%281%29.jpg 2x" data-file-width="6544" data-file-height="3680" /></a><figcaption>Manganese nodules on the seafloor in the Clarion–Clipperton zone. The image was taken with ROV KIEL 6000 during expedition SO239 with FS SONNE in April 2015.</figcaption></figure> <p>A popular area for <a href="/wiki/Deep_sea_mining" title="Deep sea mining">deep-sea mining</a>, located in the <a href="/wiki/Pacific_Ocean" title="Pacific Ocean">Pacific Ocean</a>, in the <a href="/wiki/Clarion%E2%80%93Clipperton_zone" title="Clarion–Clipperton zone">Clarion–Clipperton zone (CCZ)</a>. The CCZ is approximately 4,500,000 square kilometers constructed of various submarine <a href="/wiki/Fracture_zone" title="Fracture zone">fracture zones</a>.<sup id="cite_ref-:24_51-0" class="reference"><a href="#cite_note-:24-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> It has been divided into 16 mining claims and 9 sections dedicated to conservation.<sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> According to the <a href="/wiki/International_Seabed_Authority" title="International Seabed Authority">International Seabed Authority (ISA)</a>, there is an estimated 21 billion tons (Bt) of nodules; 5.95 Bt of manganese, 0.27 Bt of nickel, 0.23 Bt of copper, and 0.05 Bt of cobalt. It is a highly sought-after area for mining because of the yield of minerals it possesses.<sup id="cite_ref-:25_53-0" class="reference"><a href="#cite_note-:25-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-54" class="reference"><a href="#cite_note-54"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Offshore_energy_development">Offshore energy development</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=14" title="Edit section: Offshore energy development"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Marine geology also has many applications on the subject of offshore energy development.<sup id="cite_ref-55" class="reference"><a href="#cite_note-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> Offshore energy is the generation of <a href="/wiki/Electricity" title="Electricity">electricity</a> using ocean-based resources. This includes using <a href="/wiki/Wind_power" title="Wind power">wind</a>, <a href="/wiki/Thermal" title="Thermal">thermal</a><sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="not hot air, nor thermal power? (April 2024)">clarification needed</span></a></i>&#93;</sup>, <a href="/wiki/Wave" title="Wave">wave</a>, and <a href="/wiki/Tidal_power" title="Tidal power">tidal</a> movement to convert to energy.<sup id="cite_ref-56" class="reference"><a href="#cite_note-56"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup> Understanding the seafloor and geological features can help develop the <a href="/wiki/Infrastructure" title="Infrastructure">infrastructure</a> to support these <a href="/wiki/Renewable_energy" title="Renewable energy">renewable energy sources</a>.<sup id="cite_ref-57" class="reference"><a href="#cite_note-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> Underwater geological features can dictate ocean properties, such as <a href="/wiki/Current_(fluid)" title="Current (fluid)">currents</a> and <a href="/wiki/Temperature" title="Temperature">temperatures</a>, which are crucial for location placement of the necessary infrastructure to produce energy.<sup id="cite_ref-58" class="reference"><a href="#cite_note-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> </p><p>The stability of the seafloor is important for the creation of offshore <a href="/wiki/Wind_turbine" title="Wind turbine">wind turbines</a>.<sup id="cite_ref-59" class="reference"><a href="#cite_note-59"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup> Most turbines are secured to the seafloor using <a href="/wiki/Deep_foundation" title="Deep foundation">monopiles</a>, if the water depth is greater than 15 meters.<sup id="cite_ref-:26_60-0" class="reference"><a href="#cite_note-:26-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> There must be inserted in areas that are not at risk to <a href="/wiki/Deposition_(geology)" title="Deposition (geology)">sediment deposition</a>, <a href="/wiki/Erosion" title="Erosion">erosion</a>, or <a href="/wiki/Tectonics" title="Tectonics">tectonic</a> activity. <a href="/wiki/Surveying" title="Surveying">Surveying</a> the geological area before development is needed to insure proper support of the <a href="/wiki/Wind_turbine" title="Wind turbine">turbines</a> and forces applied to them.<sup id="cite_ref-:26_60-1" class="reference"><a href="#cite_note-:26-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> Another example why marine geology is needed for future energy projects is to understand <a href="/wiki/Wave" title="Wave">wave</a> and <a href="/wiki/Current_(water)" class="mw-redirect" title="Current (water)">current</a> patterns.<sup id="cite_ref-61" class="reference"><a href="#cite_note-61"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup> Analyzing the effects that the seafloor has on water movement can help support planning and location selection of generators offshore and optimize energy farming.<sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Environmental_impacts_and_mitigation">Environmental impacts and mitigation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=15" title="Edit section: Environmental impacts and mitigation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Habitat_mapping_and_conservation">Habitat mapping and conservation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=16" title="Edit section: Habitat mapping and conservation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Marine geology has a key role in <a href="/wiki/Habitat" title="Habitat">habitat</a> mapping and conservation. With global events causing potentially irreversible damage to the sea habitats, such as <a href="/wiki/Deep_sea_mining" title="Deep sea mining">deep-sea mining</a> and <a href="/wiki/Bottom_trawling" title="Bottom trawling">bottom trawling</a>, marine geology can help us study and mitigate the effects of these activity.<sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> </p><p>The CCZ has been surveyed and mapped to designate specific areas for mining and for conservation. The <a href="/wiki/International_Seabed_Authority" title="International Seabed Authority">International Seabed Authority</a> has set aside approximately 160,000 square kilometers of seabed within the CCZ as the area is rich with <a href="/wiki/Biodiversity" title="Biodiversity">biodiversity</a> and <a href="/wiki/Habitat" title="Habitat">habitats</a>.<sup id="cite_ref-:24_51-1" class="reference"><a href="#cite_note-:24-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> The zone houses over 5,000 species, including <a href="/wiki/Sea_cucumber" title="Sea cucumber">sea cucumbers</a>, <a href="/wiki/Coral" title="Coral">corals</a>, <a href="/wiki/Crab" title="Crab">crabs</a>, <a href="/wiki/Shrimp" title="Shrimp">shrimps</a>, <a href="/wiki/Hexactinellid" title="Hexactinellid">glass sponges</a>, and members of the <a href="/wiki/Spider" title="Spider">spider family</a> and, has been an area where new species of <a href="/wiki/Sea_worm" title="Sea worm">sea worms</a> have been discovered.<sup id="cite_ref-:25_53-1" class="reference"><a href="#cite_note-:25-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> Furthermore, 90% of the species have yet to be identified.<sup id="cite_ref-64" class="reference"><a href="#cite_note-64"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup> Proper marine survey techniques have protected thousands of habitats and species by dedicating it to conservation. </p><p>Bottom trawling also poses a detrimental effects to the sea and using marine geology techniques can be helpful at mitigating them.<sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup> Bottom trawling, generally a <a href="/wiki/Commercial_fishing" title="Commercial fishing">commercial fishing</a> technique, involves dragging a large net that herds and captures a target species, such as <a href="/wiki/Fish" title="Fish">fish</a> or crabs.<sup id="cite_ref-66" class="reference"><a href="#cite_note-66"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup> During this process, the net damages the seafloor by scraping and removing animals and vegetation living on the seabed, including <a href="/wiki/Coral_reef" title="Coral reef">coral reefs</a>, <a href="/wiki/Shark" title="Shark">sharks</a>, and <a href="/wiki/Sea_turtle" title="Sea turtle">sea turtles</a>.<sup id="cite_ref-67" class="reference"><a href="#cite_note-67"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> It can tear up <a href="/wiki/Root_system" title="Root system">root systems</a> and animal <a href="/wiki/Burrow" title="Burrow">burrows</a>, which can directly affect the sediment distribution.<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> This can lead to the change in <a href="/wiki/Chemistry" title="Chemistry">chemistry</a> and <a href="/wiki/Nutrition" title="Nutrition">nutriment</a> levels in the sea water.<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup> Marine geology can determine areas which have been damaged to employ habitat restoration techniques. It can also help determine areas that have not been affecting by bottom trawling and employ conservation protection. </p> <div class="mw-heading mw-heading3"><h3 id="Sediment_transportation_and_coastal_erosion">Sediment transportation and coastal erosion</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=17" title="Edit section: Sediment transportation and coastal erosion"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Sediment_transport" title="Sediment transport">Sediment transportation</a> and <a href="/wiki/Coastal_erosion" title="Coastal erosion">coastal erosion</a> is a complex subject that is necessary to understand to protect infrastructure and the environment.<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Coastal_erosion" title="Coastal erosion">Coastal erosion</a> is the process of sediment and materials breaking down and transported due to the effects of the <a href="/wiki/Sea" title="Sea">sea</a>.<sup id="cite_ref-71" class="reference"><a href="#cite_note-71"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> This can lead to destruction animal habitats, fishing industries, and infrastructure.<sup id="cite_ref-72" class="reference"><a href="#cite_note-72"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> In the United States, damages to properties and infrastructure has caused approximately $500 million per year, and an additional $150 million a year is dedicated to mitigation from the <a href="/wiki/Federal_government_of_the_United_States" title="Federal government of the United States">U.S. federal government</a>.<sup id="cite_ref-73" class="reference"><a href="#cite_note-73"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup> Marine geology supports the study of sediment types, <a href="/wiki/Current_(fluid)" title="Current (fluid)">current patterns</a>, and <a href="/wiki/Seabed" title="Seabed">ocean topography</a> to predict erosional trends which can protect these environments.<sup id="cite_ref-74" class="reference"><a href="#cite_note-74"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Natural_hazard_assessment">Natural hazard assessment</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=18" title="Edit section: Natural hazard assessment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2004_Indonesia_Tsunami_Complete.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/47/2004_Indonesia_Tsunami_Complete.gif/220px-2004_Indonesia_Tsunami_Complete.gif" decoding="async" width="220" height="202" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/4/47/2004_Indonesia_Tsunami_Complete.gif 1.5x" data-file-width="300" data-file-height="276" /></a><figcaption>Model of the earthquake epicenter and tsunami extent of the 2004 Indian Ocean earthquake</figcaption></figure> <p>Earthquakes are one of the most common <a href="/wiki/Natural_disaster" title="Natural disaster">natural disasters</a>.<sup id="cite_ref-:27_75-0" class="reference"><a href="#cite_note-:27-75"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup> Furthermore, they can cause other disasters, such as tsunamis and <a href="/wiki/Landslide" title="Landslide">landslides</a>, such as the <a href="/wiki/2004_Indian_Ocean_earthquake_and_tsunami" title="2004 Indian Ocean earthquake and tsunami">underwater earthquake in the Indian Ocean</a> occurred at a <a href="/wiki/Magnitude_(earthquake)" class="mw-redirect" title="Magnitude (earthquake)">magnitude</a> of 9.1 which then triggered a tsunami that caused waves to reach a height of at least 30&#160;ft and killed approximately 230,000 people in 13 different countries.<sup id="cite_ref-76" class="reference"><a href="#cite_note-76"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-77" class="reference"><a href="#cite_note-77"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> Marine geology and understanding plate boundaries supports the development of <a href="/wiki/Early_warning_system" title="Early warning system">early warning systems</a> and other mitigation techniques to protect the people and environments who may be susceptible to <a href="/wiki/Natural_disaster" title="Natural disaster">natural disasters</a>.<sup id="cite_ref-78" class="reference"><a href="#cite_note-78"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> Many <a href="/wiki/Earthquake_early_warning_system" title="Earthquake early warning system">earthquake early warning systems</a> (EEWS) are in place and more are being developed.<sup id="cite_ref-79" class="reference"><a href="#cite_note-79"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-80" class="reference"><a href="#cite_note-80"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Future_research">Future research</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=19" title="Edit section: Future research"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Seafloor_mapping_and_bathymetry">Seafloor mapping and bathymetry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=20" title="Edit section: Seafloor mapping and bathymetry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Many section of the oceans are permanently dark, low temperatures, and are under extreme pressure, making them difficult to observe.<sup id="cite_ref-:29_81-0" class="reference"><a href="#cite_note-:29-81"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup> According to the <a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">National Oceanic and Atmospheric Administration</a> (NOAA), only 23% of the seafloor has been mapped in detail and one of the leading projects in exploration is developing high-resolution maps of the seafloor. The <i><a href="/wiki/NOAAS_Okeanos_Explorer" title="NOAAS Okeanos Explorer">Okeanos Explorer</a></i>, a vessel owned by NOAA, has already mapped over 2 million km<sup>2</sup> of the seafloor using <a href="/wiki/Multibeam_echosounder" title="Multibeam echosounder">multibeam sonar</a> since 2008, but this technique has proved to be too time-consuming.<sup id="cite_ref-:28_82-0" class="reference"><a href="#cite_note-:28-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> </p><p>The importance of mapping the seafloor has been recognized by governments and scientists alike. Because of this, an international collaboration effort to create a high-definition map of the entire seafloor was developed, called the <a href="/wiki/Nippon_Foundation-GEBCO_Seabed_2030_Project" class="mw-redirect" title="Nippon Foundation-GEBCO Seabed 2030 Project">Nippon Foundation-GEBCO Seabed 2030 Project</a>. This committee has a set goal to have the project finished by 2030. To reach their goal, they are equipping old, new, and <a href="/wiki/Vehicular_automation" title="Vehicular automation">autonomous vehicles</a> with <a href="/wiki/Sonar" title="Sonar">sonar</a>, <a href="/wiki/Sensor" title="Sensor">sensors</a>, and other <a href="/wiki/Geographic_information_system" title="Geographic information system">GIS</a> based technology to reach their goal.<sup id="cite_ref-:28_82-1" class="reference"><a href="#cite_note-:28-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=21" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Portal:Geology" title="Portal:Geology">Geology portal</a></li> <li><a href="/wiki/Portal:Oceans" title="Portal:Oceans">Oceans portal</a></li> <li><a href="/wiki/Bathymetric_chart" title="Bathymetric chart">Bathymetric chart</a></li> <li><a href="/wiki/Hawaiian-Emperor_seamount_chain" class="mw-redirect" title="Hawaiian-Emperor seamount chain">Hawaiian-Emperor seamount chain</a></li> <li><a href="/wiki/Hydrogeology" title="Hydrogeology">Hydrogeology</a></li> <li><a href="/wiki/Pelagic_sediments" class="mw-redirect" title="Pelagic sediments">Pelagic sediments</a></li> <li><a href="/wiki/Seafloor_mapping" class="mw-redirect" title="Seafloor mapping">Seafloor mapping</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=22" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-:02-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-:02_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:02_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output 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Retrieved <span class="nowrap">2024-04-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.boem.gov&amp;rft.atitle=Boldly+Explore+Where+No+One+Has+Explored+Before+%7C+Bureau+of+Ocean+Energy+Management&amp;rft_id=https%3A%2F%2Fwww.boem.gov%2Fnewsroom%2Focean-science-news%2Fboldly-explore-where-no-one-has-explored%23%3A~%3Atext%3DToday%2C%2520over%252080%2525%2520of%2520the%2Cto%2520explore%2520the%2520vast%2520ocean.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarine+geology" class="Z3988"></span></span> </li> <li id="cite_note-:28-82"><span class="mw-cite-backlink">^ <a href="#cite_ref-:28_82-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:28_82-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://oceanexplorer.noaa.gov/explainers/mapping.html">"Seafloor Mapping"</a>. <i>oceanexplorer.noaa.gov</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2024-04-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=oceanexplorer.noaa.gov&amp;rft.atitle=Seafloor+Mapping&amp;rft_id=https%3A%2F%2Foceanexplorer.noaa.gov%2Fexplainers%2Fmapping.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarine+geology" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Sources">Sources</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=23" title="Edit section: Sources"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li>Erickson, Jon, 1996, <i>Marine Geology: Undersea Landforms and Life Forms</i>, Facts on File <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/0-8160-3354-4" title="Special:BookSources/0-8160-3354-4">0-8160-3354-4</a></li> <li>"What is the Ring of Fire?&#160;: Ocean Exploration Facts: NOAA Office of Ocean Exploration and Research". <i>oceanexplorer.noaa.gov</i>. Retrieved 2023-02-10.</li> <li>Atwood, Trisha B.; Witt, Andrew; Mayorga, Juan; Hammill, Edd; Sala, Enric (2020). "Global Patterns in Marine Sediment Carbon Stocks". <i>Frontiers in Marine Science</i>. <b>7</b>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:10.3389/fmars.2020.00165/full. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a>&#160;2296-7745.</li> <li>Merino, Nancy; Aronson, Heidi S.; Bojanova, Diana P.; Feyhl-Buska, Jayme; Wong, Michael L.; Zhang, Shu; Giovannelli, Donato (2019). "Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context". <i>Frontiers in Microbiology</i>. <b>10</b>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:10.3389/fmicb.2019.00780/full. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a>&#160;1664-302X.</li></ol> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Marine_geology&amp;action=edit&amp;section=24" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://soundwaves.usgs.gov/"><i>Soundwaves</i> Coastal Science &amp; Research News from Across the USGS</a></li> <li><a rel="nofollow" class="external text" href="http://www.ngdc.noaa.gov/mgg/aboutmgg/aboutwdcmgg.html">Marine Geology and Geophysics – NOAA</a></li> <li><a rel="nofollow" class="external text" href="https://walrus.wr.usgs.gov/pacmaps/">Pacific Seafloor Mapping Project – USGS</a></li> <li><a rel="nofollow" class="external text" href="http://web.mit.edu/mit-whoi/www/research/mgg/">Marine Geology and Geophysics at MIT</a></li> <li><a rel="nofollow" class="external text" href="http://www-odp.tamu.edu/">Ocean Drilling Program</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output 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2x" data-file-width="100" data-file-height="100" /></span></span> <b><a href="/wiki/Wikipedia:Geology" class="mw-redirect" title="Wikipedia:Geology">Geology</a></b></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Physical_oceanography" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Physical_oceanography" 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title="Ballantine scale">Ballantine scale</a></li> <li><a href="/wiki/Modulational_instability" title="Modulational instability">Benjamin–Feir instability</a></li> <li><a href="/wiki/Boussinesq_approximation_(water_waves)" title="Boussinesq approximation (water waves)">Boussinesq approximation</a></li> <li><a href="/wiki/Breaking_wave" title="Breaking wave">Breaking wave</a></li> <li><a href="/wiki/Clapotis" title="Clapotis">Clapotis</a></li> <li><a href="/wiki/Cnoidal_wave" title="Cnoidal wave">Cnoidal wave</a></li> <li><a href="/wiki/Cross_sea" title="Cross sea">Cross sea</a></li> <li><a href="/wiki/Dispersion_(water_waves)" title="Dispersion (water waves)">Dispersion</a></li> <li><a href="/wiki/Edge_wave" title="Edge wave">Edge wave</a></li> <li><a href="/wiki/Equatorial_wave" title="Equatorial wave">Equatorial waves</a></li> <li><a href="/wiki/Gravity_wave" title="Gravity wave">Gravity wave</a></li> <li><a href="/wiki/Green%27s_law" title="Green&#39;s law">Green's law</a></li> <li><a href="/wiki/Infragravity_wave" title="Infragravity wave">Infragravity wave</a></li> <li><a href="/wiki/Internal_wave" title="Internal wave">Internal wave</a></li> <li><a href="/wiki/Iribarren_number" title="Iribarren number">Iribarren number</a></li> <li><a href="/wiki/Kelvin_wave" title="Kelvin wave">Kelvin wave</a></li> <li><a href="/wiki/Kinematic_wave" title="Kinematic wave">Kinematic wave</a></li> <li><a href="/wiki/Longshore_drift" title="Longshore drift">Longshore drift</a></li> <li><a href="/wiki/Luke%27s_variational_principle" title="Luke&#39;s variational principle">Luke's variational principle</a></li> <li><a href="/wiki/Mild-slope_equation" title="Mild-slope equation">Mild-slope equation</a></li> <li><a href="/wiki/Radiation_stress" title="Radiation stress">Radiation stress</a></li> <li><a href="/wiki/Rogue_wave" title="Rogue wave">Rogue wave</a></li> <li><a href="/wiki/Rossby_wave" title="Rossby wave">Rossby wave</a></li> <li><a href="/wiki/Rossby-gravity_waves" title="Rossby-gravity waves">Rossby-gravity waves</a></li> <li><a href="/wiki/Sea_state" title="Sea state">Sea state</a></li> <li><a href="/wiki/Seiche" title="Seiche">Seiche</a></li> <li><a href="/wiki/Significant_wave_height" title="Significant wave height">Significant wave height</a></li> <li><a href="/wiki/Soliton" title="Soliton">Soliton</a></li> <li><a href="/wiki/Stokes_drift" title="Stokes drift">Stokes drift</a></li> <li><a href="/wiki/Stokes_problem" title="Stokes problem">Stokes problem</a></li> <li><a href="/wiki/Stokes_wave" title="Stokes wave">Stokes wave</a></li> <li><a href="/wiki/Swell_(ocean)" title="Swell (ocean)">Swell</a></li> <li><a href="/wiki/Trochoidal_wave" title="Trochoidal wave">Trochoidal wave</a></li> <li><a href="/wiki/Tsunami" title="Tsunami">Tsunami</a> <ul><li><a href="/wiki/Megatsunami" title="Megatsunami">megatsunami</a></li></ul></li> <li><a href="/wiki/Undertow_(water_waves)" title="Undertow (water waves)">Undertow</a></li> <li><a href="/wiki/Ursell_number" title="Ursell number">Ursell number</a></li> <li><a href="/wiki/Wave_action_(continuum_mechanics)" title="Wave action (continuum mechanics)">Wave action</a></li> <li><a href="/wiki/Wave_base" title="Wave base">Wave base</a></li> <li><a href="/wiki/Wave_height" title="Wave height">Wave height</a></li> <li><a href="/wiki/Wave_nonlinearity" title="Wave nonlinearity">Wave nonlinearity</a></li> <li><a href="/wiki/Wave_power" title="Wave power">Wave power</a></li> <li><a href="/wiki/Wave_radar" title="Wave radar">Wave radar</a></li> <li><a href="/wiki/Wave_setup" title="Wave setup">Wave setup</a></li> <li><a href="/wiki/Wave_shoaling" title="Wave shoaling">Wave shoaling</a></li> <li><a href="/wiki/Wave_turbulence" title="Wave turbulence">Wave turbulence</a></li> <li><a href="/wiki/Wave%E2%80%93current_interaction" title="Wave–current interaction">Wave–current interaction</a></li> <li><a href="/wiki/Waves_and_shallow_water" title="Waves and shallow water">Waves and shallow water</a> <ul><li><a href="/wiki/One-dimensional_Saint-Venant_equations" class="mw-redirect" title="One-dimensional Saint-Venant equations">one-dimensional Saint-Venant equations</a></li> <li><a href="/wiki/Shallow_water_equations" title="Shallow water equations">shallow water equations</a></li></ul></li> <li><a href="/wiki/Wind_fetch" title="Wind fetch">Wind fetch</a></li> <li><a href="/wiki/Wind_setup" title="Wind setup">Wind setup</a></li> <li><a href="/wiki/Wind_wave" title="Wind wave">Wind wave</a> <ul><li><a href="/wiki/Wind_wave_model" title="Wind wave model">model</a></li></ul></li></ul> </div></td><td class="noviewer navbox-image" rowspan="10" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Upwelling.svg" class="mw-file-description" title="Upwelling"><img alt="Upwelling" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Upwelling.svg/120px-Upwelling.svg.png" decoding="async" width="120" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Upwelling.svg/180px-Upwelling.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Upwelling.svg/240px-Upwelling.svg.png 2x" data-file-width="365" data-file-height="242" /></a></span><br /><br /><br /><br /><br /><br /><span typeof="mw:File"><a href="/wiki/File:Antarctic_bottom_water.svg" class="mw-file-description" title="Antarctic bottom water"><img alt="Antarctic bottom water" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Antarctic_bottom_water.svg/120px-Antarctic_bottom_water.svg.png" decoding="async" width="120" height="76" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Antarctic_bottom_water.svg/180px-Antarctic_bottom_water.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Antarctic_bottom_water.svg/240px-Antarctic_bottom_water.svg.png 2x" data-file-width="745" data-file-height="470" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Ocean_current" title="Ocean current">Circulation</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atmospheric_circulation" title="Atmospheric circulation">Atmospheric circulation</a></li> <li><a href="/wiki/Baroclinity" title="Baroclinity">Baroclinity</a></li> <li><a href="/wiki/Boundary_current" title="Boundary current">Boundary current</a></li> <li><a href="/wiki/Coriolis_force" title="Coriolis force">Coriolis force</a></li> <li><a href="/wiki/Coriolis%E2%80%93Stokes_force" title="Coriolis–Stokes force">Coriolis–Stokes force</a></li> <li><a href="/wiki/Craik%E2%80%93Leibovich_vortex_force" title="Craik–Leibovich vortex force">Craik–Leibovich vortex force</a></li> <li><a href="/wiki/Downwelling" title="Downwelling">Downwelling</a></li> <li><a href="/wiki/Eddy_(fluid_dynamics)" title="Eddy (fluid dynamics)">Eddy</a></li> <li><a href="/wiki/Ekman_layer" title="Ekman layer">Ekman layer</a></li> <li><a href="/wiki/Ekman_spiral" title="Ekman spiral">Ekman spiral</a></li> <li><a href="/wiki/Ekman_transport" title="Ekman transport">Ekman transport</a></li> <li><a href="/wiki/El_Ni%C3%B1o%E2%80%93Southern_Oscillation" title="El Niño–Southern Oscillation">El Niño–Southern Oscillation</a></li> <li><a href="/wiki/General_circulation_model" title="General circulation model">General circulation model</a></li> <li><a href="/wiki/Geochemical_Ocean_Sections_Study" title="Geochemical Ocean Sections Study">Geochemical Ocean Sections Study</a></li> <li><a href="/wiki/Geostrophic_current" title="Geostrophic current">Geostrophic current</a></li> <li><a href="/wiki/Global_Ocean_Data_Analysis_Project" title="Global Ocean Data Analysis Project">Global Ocean Data Analysis Project</a></li> <li><a href="/wiki/Gulf_Stream" title="Gulf Stream">Gulf Stream</a></li> <li><a href="/wiki/Humboldt_Current" title="Humboldt Current">Humboldt Current</a></li> <li><a href="/wiki/Hydrothermal_circulation" title="Hydrothermal circulation">Hydrothermal circulation</a></li> <li><a href="/wiki/Langmuir_circulation" title="Langmuir circulation">Langmuir circulation</a></li> <li><a href="/wiki/Longshore_drift" title="Longshore drift">Longshore drift</a></li> <li><a href="/wiki/Loop_Current" title="Loop Current">Loop Current</a></li> <li><a href="/wiki/Modular_Ocean_Model" title="Modular Ocean Model">Modular Ocean Model</a></li> <li><a href="/wiki/Ocean_current" title="Ocean current">Ocean current</a></li> <li><a href="/wiki/Ocean_dynamical_thermostat" title="Ocean dynamical thermostat">Ocean dynamical thermostat</a></li> <li><a href="/wiki/Ocean_dynamics" title="Ocean dynamics">Ocean dynamics</a></li> <li><a href="/wiki/Ocean_gyre" title="Ocean gyre">Ocean gyre</a></li> <li><a href="/wiki/Overflow_(oceanography)" title="Overflow (oceanography)">Overflow</a></li> <li><a href="/wiki/Princeton_Ocean_Model" title="Princeton Ocean Model">Princeton Ocean Model</a></li> <li><a href="/wiki/Rip_current" title="Rip current">Rip current</a></li> <li><a href="/wiki/Subsurface_ocean_current" title="Subsurface ocean current">Subsurface ocean current</a></li> <li><a href="/wiki/Sverdrup_balance" title="Sverdrup balance">Sverdrup balance</a></li> <li><a href="/wiki/Thermohaline_circulation" title="Thermohaline circulation">Thermohaline circulation</a> <ul><li><a href="/wiki/Shutdown_of_thermohaline_circulation" class="mw-redirect" title="Shutdown of thermohaline circulation">shutdown</a></li></ul></li> <li><a href="/wiki/Upwelling" title="Upwelling">Upwelling</a></li> <li><a href="/wiki/Whirlpool" title="Whirlpool">Whirlpool</a></li> <li><a href="/wiki/Wind_generated_current" title="Wind generated current">Wind generated current</a></li> <li><a href="/wiki/World_Ocean_Circulation_Experiment" title="World Ocean Circulation Experiment">World Ocean Circulation Experiment</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Tide" title="Tide">Tides</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amphidromic_point" title="Amphidromic point">Amphidromic point</a></li> <li><a href="/wiki/Earth_tide" title="Earth tide">Earth tide</a></li> <li><a href="/wiki/Head_of_tide" title="Head of tide">Head of tide</a></li> <li><a href="/wiki/Internal_tide" title="Internal tide">Internal tide</a></li> <li><a href="/wiki/Lunitidal_interval" title="Lunitidal interval">Lunitidal interval</a></li> <li><a href="/wiki/Perigean_spring_tide" title="Perigean spring tide">Perigean spring tide</a></li> <li><a href="/wiki/Rip_tide" title="Rip tide">Rip tide</a></li> <li><a href="/wiki/Rule_of_twelfths" title="Rule of twelfths">Rule of twelfths</a></li> <li><a href="/wiki/Slack_tide" title="Slack tide">Slack tide</a></li> <li><a href="/wiki/Theory_of_tides" title="Theory of tides">Theory of tides</a></li> <li><a href="/wiki/Tidal_bore" title="Tidal bore">Tidal bore</a></li> <li><a href="/wiki/Tidal_force" title="Tidal force">Tidal force</a></li> <li><a href="/wiki/Tidal_power" title="Tidal power">Tidal power</a></li> <li><a href="/wiki/Tidal_race" title="Tidal race">Tidal race</a></li> <li><a href="/wiki/Tidal_range" title="Tidal range">Tidal range</a></li> <li><a href="/wiki/Tidal_resonance" title="Tidal resonance">Tidal resonance</a></li> <li><a href="/wiki/Tide_gauge" title="Tide gauge">Tide gauge</a></li> <li><a href="/wiki/Tideline" title="Tideline">Tideline</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Landform" title="Landform">Landforms</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abyssal_fan" title="Abyssal fan">Abyssal fan</a></li> <li><a href="/wiki/Abyssal_plain" title="Abyssal plain">Abyssal plain</a></li> <li><a href="/wiki/Atoll" title="Atoll">Atoll</a></li> <li><a href="/wiki/Bathymetric_chart" title="Bathymetric chart">Bathymetric chart</a></li> <li><a href="/wiki/Carbonate_platform" title="Carbonate platform">Carbonate platform</a></li> <li><a href="/wiki/Coastal_geography" title="Coastal geography">Coastal geography</a></li> <li><a href="/wiki/Cold_seep" title="Cold seep">Cold seep</a></li> <li><a href="/wiki/Continental_margin" title="Continental margin">Continental margin</a></li> <li><a href="/wiki/Continental_rise" title="Continental rise">Continental rise</a></li> <li><a href="/wiki/Continental_shelf" title="Continental shelf">Continental shelf</a></li> <li><a href="/wiki/Contourite" title="Contourite">Contourite</a></li> <li><a href="/wiki/Guyot" title="Guyot">Guyot</a></li> <li><a href="/wiki/Hydrography" title="Hydrography">Hydrography</a></li> <li><a href="/wiki/Knoll_(oceanography)" title="Knoll (oceanography)">Knoll</a></li> <li><a href="/wiki/Ocean_bank" title="Ocean bank">Ocean bank</a></li> <li><a href="/wiki/Oceanic_basin" title="Oceanic basin">Oceanic basin</a></li> <li><a href="/wiki/Oceanic_plateau" title="Oceanic plateau">Oceanic plateau</a></li> <li><a href="/wiki/Oceanic_trench" title="Oceanic trench">Oceanic trench</a></li> <li><a href="/wiki/Passive_margin" title="Passive margin">Passive margin</a></li> <li><a href="/wiki/Seabed" title="Seabed">Seabed</a></li> <li><a href="/wiki/Seamount" title="Seamount">Seamount</a></li> <li><a href="/wiki/Submarine_canyon" title="Submarine canyon">Submarine canyon</a></li> <li><a href="/wiki/Submarine_volcano" title="Submarine volcano">Submarine volcano</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Plate_tectonics" title="Plate tectonics">Plate<br />tectonics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Convergent_boundary" title="Convergent boundary">Convergent boundary</a></li> <li><a href="/wiki/Divergent_boundary" title="Divergent boundary">Divergent boundary</a></li> <li><a href="/wiki/Fracture_zone" title="Fracture zone">Fracture zone</a></li> <li><a href="/wiki/Hydrothermal_vent" title="Hydrothermal vent">Hydrothermal vent</a></li> <li><a class="mw-selflink selflink">Marine geology</a></li> <li><a href="/wiki/Mid-ocean_ridge" title="Mid-ocean ridge">Mid-ocean ridge</a></li> <li><a href="/wiki/Mohorovi%C4%8Di%C4%87_discontinuity" title="Mohorovičić discontinuity">Mohorovičić discontinuity</a></li> <li><a href="/wiki/Oceanic_crust" title="Oceanic crust">Oceanic crust</a></li> <li><a href="/wiki/Outer_trench_swell" title="Outer trench swell">Outer trench swell</a></li> <li><a href="/wiki/Ridge_push" title="Ridge push">Ridge push</a></li> <li><a href="/wiki/Seafloor_spreading" title="Seafloor spreading">Seafloor spreading</a></li> <li><a href="/wiki/Slab_pull" title="Slab pull">Slab pull</a></li> <li><a href="/wiki/Slab_suction" title="Slab suction">Slab suction</a></li> <li><a href="/wiki/Slab_window" title="Slab window">Slab window</a></li> <li><a href="/wiki/Subduction" title="Subduction">Subduction</a></li> <li><a href="/wiki/Transform_fault" title="Transform fault">Transform fault</a></li> <li><a href="/wiki/Vine%E2%80%93Matthews%E2%80%93Morley_hypothesis" title="Vine–Matthews–Morley hypothesis">Vine–Matthews–Morley hypothesis</a></li> <li><a href="/wiki/Volcanic_arc" title="Volcanic arc">Volcanic arc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Ocean zones</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Benthic_zone" title="Benthic zone">Benthic</a></li> <li><a href="/wiki/Deep_ocean_water" title="Deep ocean water">Deep ocean water</a></li> <li><a href="/wiki/Deep_sea" title="Deep sea">Deep sea</a></li> <li><a href="/wiki/Littoral_zone" title="Littoral zone">Littoral</a></li> <li><a href="/wiki/Mesopelagic_zone" title="Mesopelagic zone">Mesopelagic</a></li> <li><a href="/wiki/Oceanic_zone" title="Oceanic zone">Oceanic</a></li> <li><a href="/wiki/Pelagic_zone" title="Pelagic zone">Pelagic</a></li> <li><a href="/wiki/Photic_zone" title="Photic zone">Photic</a></li> <li><a href="/wiki/Surf_zone" title="Surf zone">Surf</a></li> <li><a href="/wiki/Swash" title="Swash">Swash</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Sea_level" title="Sea level">Sea level</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Deep-ocean_Assessment_and_Reporting_of_Tsunamis" title="Deep-ocean Assessment and Reporting of Tsunamis">Deep-ocean Assessment and Reporting of Tsunamis</a></li> <li><a href="/wiki/Global_Sea_Level_Observing_System" title="Global Sea Level Observing System">Global Sea Level Observing System</a></li> <li><a href="/wiki/North_West_Shelf_Operational_Oceanographic_System" title="North West Shelf Operational Oceanographic System">North West Shelf Operational Oceanographic System</a></li> <li><a href="/wiki/Sea-level_curve" title="Sea-level curve">Sea-level curve</a></li> <li><a href="/wiki/Sea_level_drop" title="Sea level drop">Sea level drop</a></li> <li><a href="/wiki/Sea_level_rise" title="Sea level rise">Sea level rise</a></li> <li><a href="/wiki/World_Geodetic_System" title="World Geodetic System">World Geodetic System</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Acoustical_oceanography" class="mw-redirect" title="Acoustical oceanography">Acoustics</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Deep_scattering_layer" title="Deep scattering layer">Deep scattering layer</a></li> <li><a href="/wiki/Ocean_acoustic_tomography" title="Ocean acoustic tomography">Ocean acoustic tomography</a></li> <li><a href="/wiki/Sofar_bomb" title="Sofar bomb">Sofar bomb</a></li> <li><a href="/wiki/SOFAR_channel" title="SOFAR channel">SOFAR channel</a></li> <li><a href="/wiki/Underwater_acoustics" title="Underwater acoustics">Underwater acoustics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Satellites</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Jason-1" title="Jason-1">Jason-1</a></li> <li><a href="/wiki/OSTM/Jason-2" title="OSTM/Jason-2">OSTM/Jason-2</a></li> <li><a href="/wiki/Jason-3" title="Jason-3">Jason-3</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ocean_acidification" title="Ocean acidification">Acidification</a></li> <li><a href="/wiki/Argo_(oceanography)" title="Argo (oceanography)">Argo</a></li> <li><a href="/wiki/Benthic_lander" title="Benthic lander">Benthic lander</a></li> <li><a href="/wiki/Color_of_water" title="Color of water">Color of water</a></li> <li><a href="/wiki/DSV_Alvin" title="DSV Alvin">DSV <i>Alvin</i></a></li> <li><a href="/wiki/Marginal_sea" class="mw-redirect" title="Marginal sea">Marginal sea</a></li> <li><a href="/wiki/Marine_energy" title="Marine energy">Marine energy</a></li> <li><a href="/wiki/Marine_pollution" title="Marine pollution">Marine pollution</a></li> <li><a href="/wiki/Mooring_(oceanography)" title="Mooring (oceanography)">Mooring</a></li> <li><a href="/wiki/National_Oceanographic_Data_Center" title="National Oceanographic Data Center">National Oceanographic Data Center</a></li> <li><a href="/wiki/Ocean" title="Ocean">Ocean</a></li> <li><a href="/wiki/Ocean_exploration" title="Ocean exploration">Explorations</a></li> <li><a href="/wiki/Ocean_observations" title="Ocean observations">Observations</a></li> <li><a href="/wiki/Ocean_reanalysis" title="Ocean reanalysis">Reanalysis</a></li> <li><a href="/wiki/Ocean_surface_topography" title="Ocean surface topography">Ocean surface topography</a></li> <li><a href="/wiki/Ocean_temperature" title="Ocean temperature">Ocean temperature</a></li> <li><a href="/wiki/Ocean_thermal_energy_conversion" title="Ocean thermal energy conversion">Ocean thermal energy conversion</a></li> <li><a href="/wiki/Oceanography" title="Oceanography">Oceanography</a> <ul><li><a href="/wiki/Outline_of_oceanography" title="Outline of oceanography">Outline of oceanography</a></li></ul></li> <li><a href="/wiki/Pelagic_sediment" title="Pelagic sediment">Pelagic sediment</a></li> <li><a href="/wiki/Sea_surface_microlayer" title="Sea surface microlayer">Sea surface microlayer</a></li> <li><a href="/wiki/Sea_surface_temperature" title="Sea surface temperature">Sea surface temperature</a></li> <li><a href="/wiki/Seawater" title="Seawater">Seawater</a></li> <li><a href="/wiki/Science_On_a_Sphere" title="Science On a Sphere">Science On a Sphere</a></li> <li><a href="/wiki/Ocean_stratification" title="Ocean stratification">Stratification</a></li> <li><a href="/wiki/Thermocline" title="Thermocline">Thermocline</a></li> <li><a href="/wiki/Underwater_glider" title="Underwater glider">Underwater glider</a></li> <li><a href="/wiki/Water_column" title="Water column">Water column</a></li> <li><a href="/wiki/World_Ocean_Atlas" title="World Ocean Atlas">World Ocean Atlas</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" 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href="https://commons.wikimedia.org/wiki/Category:Physical_oceanography" class="extiw" title="commons:Category:Physical oceanography">Commons</a></li> <li><span class="nowrap"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Waves_in_pacifica_1.jpg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Waves_in_pacifica_1.jpg/16px-Waves_in_pacifica_1.jpg" decoding="async" width="16" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Waves_in_pacifica_1.jpg/24px-Waves_in_pacifica_1.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/45/Waves_in_pacifica_1.jpg/32px-Waves_in_pacifica_1.jpg 2x" data-file-width="2000" data-file-height="1358" /></a></span> </span><a href="/wiki/Portal:Oceans" title="Portal:Oceans">Oceans&#32;portal</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" 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class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Géologie sous-marine"><a rel="nofollow" class="external text" href="https://catalogue.bnf.fr/ark:/12148/cb119315661">France</a></span></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Géologie sous-marine"><a rel="nofollow" class="external text" href="https://data.bnf.fr/ark:/12148/cb119315661">BnF data</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.ndl.go.jp/auth/ndlna/00564654">Japan</a></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="mořská geologie"><a rel="nofollow" class="external text" href="https://aleph.nkp.cz/F/?func=find-c&amp;local_base=aut&amp;ccl_term=ica=ph124159&amp;CON_LNG=ENG">Czech Republic</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" 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