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class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Middle Jurassic</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. 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interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Xur%C3%A1sicu_Mediu" title="Xurásicu Mediu – Asturian" lang="ast" hreflang="ast" data-title="Xurásicu Mediu" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Srednja_jura" title="Srednja jura – Bosnian" lang="bs" hreflang="bs" data-title="Srednja jura" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Mitteljura" title="Mitteljura – German" lang="de" hreflang="de" data-title="Mitteljura" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Middle_Jurassic" title="Middle Jurassic – English" lang="en" hreflang="en" data-title="Middle Jurassic" data-language-autonym="English" data-language-local-name="English" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Jur%C3%A1sico_Medio" title="Jurásico Medio – Spanish" lang="es" hreflang="es" data-title="Jurásico Medio" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Jurasiko_Ertain" title="Jurasiko Ertain – Basque" lang="eu" hreflang="eu" data-title="Jurasiko Ertain" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%98%D9%88%D8%B1%D8%A7%D8%B3%DB%8C%DA%A9_%D9%85%DB%8C%D8%A7%D9%86%D9%87" title="ژوراسیک میانه – Persian" lang="fa" hreflang="fa" data-title="ژوراسیک میانه" 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/Jurassique_moyen" title="Jurassique moyen – French" lang="fr" hreflang="fr" data-title="Jurassique moyen" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AE%E0%A4%A7%E0%A5%8D%E0%A4%AF_%E0%A4%9C%E0%A5%81%E0%A4%B0%E0%A5%88%E0%A4%B8%E0%A4%BF%E0%A4%95_%E0%A4%AF%E0%A5%81%E0%A4%97" title="मध्य जुरैसिक युग – Hindi" lang="hi" hreflang="hi" data-title="मध्य जुरैसिक युग" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Jura_Tengah" title="Jura Tengah – Indonesian" lang="id" hreflang="id" data-title="Jura Tengah" 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-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Mi%C3%B0j%C3%BArat%C3%ADmabili%C3%B0" title="Miðjúratímabilið – Icelandic" lang="is" hreflang="is" data-title="Miðjúratímabilið" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Giurassico_medio" title="Giurassico medio – Italian" lang="it" hreflang="it" data-title="Giurassico medio" 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%99%D7%95%D7%A8%D7%94_%D7%AA%D7%99%D7%9B%D7%95%D7%9F" title="יורה תיכון – Hebrew" lang="he" hreflang="he" data-title="יורה תיכון" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Iurassicum_medium" title="Iurassicum medium – Latin" lang="la" hreflang="la" data-title="Iurassicum medium" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/K%C3%B6z%C3%A9ps%C5%91_jura" title="Középső jura – Hungarian" lang="hu" hreflang="hu" data-title="Középső jura" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Jura_Tengah" title="Jura Tengah – Malay" lang="ms" hreflang="ms" data-title="Jura Tengah" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Dogger" title="Dogger – Dutch" lang="nl" hreflang="nl" data-title="Dogger" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E4%B8%AD%E6%9C%9F%E3%82%B8%E3%83%A5%E3%83%A9%E7%B4%80" title="中期ジュラ紀 – Japanese" lang="ja" hreflang="ja" data-title="中期ジュラ紀" 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-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Mellomjura" title="Mellomjura – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Mellomjura" 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-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Middeljura" title="Middeljura – Low German" lang="nds" hreflang="nds" data-title="Middeljura" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Jura_%C5%9Brodkowa" title="Jura środkowa – Polish" lang="pl" hreflang="pl" data-title="Jura środkowa" 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/Jur%C3%A1ssico_M%C3%A9dio" title="Jurássico Médio – Portuguese" lang="pt" hreflang="pt" data-title="Jurássico Médio" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D1%80%D0%B5%D0%B4%D0%BD%D1%8F%D1%8F_%D1%8E%D1%80%D0%B0" title="Средняя юра – Russian" lang="ru" hreflang="ru" data-title="Средняя юра" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Srednja_jura" title="Srednja jura – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Srednja jura" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Keskijurakausi" title="Keskijurakausi – Finnish" lang="fi" hreflang="fi" data-title="Keskijurakausi" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Mellersta_jura" title="Mellersta jura – Swedish" lang="sv" hreflang="sv" data-title="Mellersta jura" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Orta_Jura" title="Orta Jura – Turkish" lang="tr" hreflang="tr" data-title="Orta Jura" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%BE%D0%B3%D0%B3%D0%B5%D1%80" title="Доггер – Ukrainian" lang="uk" hreflang="uk" data-title="Доггер" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Trung_Jura" title="Trung Jura – Vietnamese" lang="vi" hreflang="vi" data-title="Trung Jura" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li> </ul> <div 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accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Simple English Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>The <b>Middle Jurassic</b> is the second <a href="/wiki/Geology" title="Geology">geological</a> <a href="/wiki/Epoch_(geology)" title="Epoch (geology)">epoch</a> in the <a href="/wiki/Jurassic" title="Jurassic">Jurassic</a>. It began 174.1 <a href="/wiki/Million" class="mw-redirect" title="Million">million</a> years ago, and ended at 163.5 million years ago. </p><p>In the Middle Jurassic, <a href="/wiki/Pangaea" title="Pangaea">Pangaea</a> began to split apart. It began to separate into <a href="/wiki/Laurasia" title="Laurasia">Laurasia</a> and <a href="/wiki/Gondwana" title="Gondwana">Gondwana</a>, and the <a href="/wiki/Atlantic_Ocean" title="Atlantic Ocean">Atlantic Ocean</a> formed. <a href="/wiki/Tectonic" class="mw-redirect" title="Tectonic">Tectonic</a> activities closed the <a href="/wiki/Paleo-Tethys_Ocean" class="mw-redirect" title="Paleo-Tethys Ocean">Paleo-Tethys Ocean</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> A subduction zone<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> on the coast of western <a href="/wiki/North_America" title="North America">North America</a> continues to create the ancestral <a href="/wiki/Rocky_Mountains" title="Rocky Mountains">Rocky Mountains</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Life_of_the_epoch">Life of the epoch</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Middle_Jurassic&veaction=edit&section=1" title="Change section: Life of the epoch" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=1" title="Edit section's source code: Life of the epoch"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Marine_life">Marine life</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Middle_Jurassic&veaction=edit&section=2" title="Change section: Marine life" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=2" title="Edit section's source code: Marine life"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>During this time, marine life (including <a href="/wiki/Ammonite" title="Ammonite">ammonites</a> and <a href="/wiki/Bivalve" title="Bivalve">bivalves</a>) flourished. <a href="/wiki/Ichthyosaur" title="Ichthyosaur">Ichthyosaurs</a>, although common, are reduced in diversity. A type of <a href="/wiki/Crocodilia" title="Crocodilia">crocodilians</a> first appeared. </p><p><a href="/wiki/Plesiosaur" title="Plesiosaur">Plesiosaurs</a> became common at this time. The top marine predators, the <a href="/wiki/Pliosaur" title="Pliosaur">pliosaurs</a>, grew to the size of <a href="/wiki/Orca" class="mw-redirect" title="Orca">killer whales</a> and larger e.g. <i><a href="/wiki/Pliosaurus" title="Pliosaurus">Pliosaurus</a></i>, <i><a href="/wiki/Liopleurodon" title="Liopleurodon">Liopleurodon</a></i>. </p> <div class="mw-heading mw-heading3"><h3 id="Terrestrial_life">Terrestrial life</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Middle_Jurassic&veaction=edit&section=3" title="Change section: Terrestrial life" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=3" title="Edit section's source code: Terrestrial life"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>New types of <a href="/wiki/Dinosaur" title="Dinosaur">dinosaurs</a> evolved on land. <i><a href="/wiki/Cetiosaurus" title="Cetiosaurus">Cetiosaurus</a></i> was an early sauropod found in England in the mid-19th century.<sup id="cite_ref-Dodson_3-0" class="reference"><a href="#cite_note-Dodson-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>The environment in which <i>Cetiosaurus</i> lived was <a href="/wiki/Floodplain" title="Floodplain">floodplain</a> and open <a href="/wiki/Woodland" title="Woodland">woodland</a>. <a href="/wiki/Brachiosauridae" class="mw-redirect" title="Brachiosauridae">Brachiosaurs</a> and <i><a href="/wiki/Megalosaurus" title="Megalosaurus">Megalosaurus</a></i> also lived in this <a href="/wiki/Environment" title="Environment">environment</a>. </p><p>The <a href="/wiki/Cynodont" title="Cynodont">cynodont</a> <a href="/wiki/Therapsid" title="Therapsid">therapsids</a> flourished with the dinosaurs, but they were only <a href="/wiki/Shrew" title="Shrew">shrew</a>-sized. None grew larger than a <a href="/wiki/Badger" title="Badger">badger</a>. One group of cynodonts, the <a href="/w/index.php?title=Trithelodont&action=edit&redlink=1" class="new" title="Trithelodont (not yet started)">Trithelodonts</a> were becoming rare and eventually became extinct at the end of this epoch. The <a href="/wiki/Tritylodont" title="Tritylodont">Tritylodonts</a> were still common, though. In this epoch "true" <a href="/wiki/Mammal" title="Mammal">mammals</a> evolved from a group of cynodonts. </p> <div class="mw-heading mw-heading3"><h3 id="Flora">Flora</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Middle_Jurassic&veaction=edit&section=4" title="Change section: Flora" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=4" title="Edit section's source code: Flora"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Conifer" title="Conifer">Conifers</a> were dominant in the Middle Jurassic. Other plants, such as <a href="/wiki/Ginkgo" title="Ginkgo">ginkgoes</a>, <a href="/wiki/Cycad" title="Cycad">cycads</a>, and <a href="/wiki/Fern" title="Fern">ferns</a> were also common. These are the trees which the large herbivores ate. </p> <div class="mw-heading mw-heading2"><h2 id="Related_pages">Related pages</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Middle_Jurassic&veaction=edit&section=5" title="Change section: Related pages" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=5" title="Edit section's source code: Related pages"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Jurassic" title="Jurassic">Jurassic</a></li> <li><a href="/wiki/Lower_Jurassic" title="Lower Jurassic">Lower Jurassic</a></li> <li><a href="/wiki/Upper_Jurassic" title="Upper Jurassic">Upper Jurassic</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=Middle_Jurassic&veaction=edit&section=6" title="Change section: References" class="mw-editsection-visualeditor"><span>change</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Middle_Jurassic&action=edit&section=6" title="Edit section's source code: References"><span>change source</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r9724317">.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"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">The Tethys Ocean: an ancient seaway approximately in the position of the <a href="/wiki/Mediterranean" class="mw-redirect" title="Mediterranean">Mediterranean</a>.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">Formed by an oceanic plate sliding under a continental plate.</span> </li> <li id="cite_note-Dodson-3"><span class="mw-cite-backlink"><a href="#cite_ref-Dodson_3-0">↑</a></span> <span class="reference-text">"Cetiosaurus." In: Dodson, Peter et al. <i>The Age of Dinosaurs</i>. Publications International, p65. <style data-mw-deduplicate="TemplateStyles:r9724332">.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 .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-7853-0443-6" title="Special:BookSources/0-7853-0443-6">0-7853-0443-6</a>.</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r9724332"><cite id="CITEREFUpchurch_P_&_Martin_J2002" class="citation journal cs1">Upchurch P & Martin J (2002). "The Rutland <i>Cetiosaurus</i>: the anatomy and relationships of a Middle Jurassic British sauropod dinosaur". <i>Palaeontology</i>. <b>45</b> (6): 1049–1074. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1111%2F1475-4983.00275">10.1111/1475-4983.00275</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:84628061">84628061</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Palaeontology&rft.atitle=The+Rutland+Cetiosaurus%3A+the+anatomy+and+relationships+of+a+Middle+Jurassic+British+sauropod+dinosaur.&rft.volume=45&rft.issue=6&rft.pages=1049-1074&rft.date=2002&rft_id=info%3Adoi%2F10.1111%2F1475-4983.00275&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A84628061%23id-name%3DS2CID&rft.au=Upchurch+P+%26+Martin+J&rfr_id=info%3Asid%2Fsimple.wikipedia.org%3AMiddle+Jurassic" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles nomobile"><style data-mw-deduplicate="TemplateStyles:r9122492">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output 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template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Geological_history_of_Earth" title="Template talk:Geological history of Earth"><abbr title="Discuss this template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">t</abbr></a></li><li class="nv-edit"><a class="external text" href="https://simple.wikipedia.org/w/index.php?title=Template:Geological_history_of_Earth&action=edit"><abbr title="Edit this template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">e</abbr></a></li></ul></div><div id="Geological_history_of_Earth" style="font-size:114%;margin:0 4em"><a href="/wiki/Geological_history_of_Earth" title="Geological history of Earth">Geological history of Earth</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cainozoic" title="Cainozoic">Cenozoic era<br /><style data-mw-deduplicate="TemplateStyles:r6670383">'"`UNIQ--templatestyles-0000000D-QINU`"'</style><span class="nobold">(the last 66 million years)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Quaternary" title="Quaternary">Quaternary <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(the last 2.588 million years)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Holocene" title="Holocene">Holocene (the last 11,650 years)</a></li> <li><a href="/wiki/Pleistocene" title="Pleistocene">Pleistocene (11,650 years ago–2.588 million years ago)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Neogene" title="Neogene">Neogene <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(2.588 million years ago–23.03</span></a> <a href="/wiki/Mya" class="mw-redirect" title="Mya">mya</a><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">)</span></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pliocene" title="Pliocene">Pliocene (2.588–5.333 mya)</a></li> <li><a href="/wiki/Miocene" title="Miocene">Miocene (5.333–23.03 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Palaeogene" title="Palaeogene">Palaeogene <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(23.03 million years ago–66 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Oligocene" title="Oligocene">Oligocene (23.03–33.9 mya)</a></li> <li><a href="/wiki/Eocene" title="Eocene">Eocene (33.9–56.0 mya)</a></li> <li><a href="/wiki/Palaeocene" title="Palaeocene">Palaeocene (56.0–66.0 mya)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mesozoic" title="Mesozoic">Mesozoic era<br /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(66 million years ago–251.902 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Cretaceous" title="Cretaceous">Cretaceous <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(66 million years ago–145.0 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Late_Cretaceous" class="mw-redirect" title="Late Cretaceous">Late (66.0–100.5 mya)</a></li> <li><a href="/wiki/Early_Cretaceous" class="mw-redirect" title="Early Cretaceous">Early (100.5–145.0 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Jurassic" title="Jurassic">Jurassic <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(145 million years ago–201.3 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Late_Jurassic" class="mw-redirect" title="Late Jurassic">Late (145.0–163.5 mya)</a></li> <li><a class="mw-selflink selflink">Middle (163.5–174.1 mya)</a></li> <li><a href="/wiki/Early_Jurassic" class="mw-redirect" title="Early Jurassic">Early (174.1–201.3 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Triassic" title="Triassic">Triassic <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(201.3–251.902 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Late_Triassic" class="mw-redirect" title="Late Triassic">Late (201.3–237 mya)</a></li> <li><a href="/wiki/Middle_Triassic" title="Middle Triassic">Middle (237–247.2 mya)</a></li> <li><a href="/wiki/Early_Triassic" class="mw-redirect" title="Early Triassic">Early (247.2–251.902 mya)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Palaeozoic" title="Palaeozoic">Palaeozoic era<br /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(251.902–541.0 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Permian" title="Permian">Permian <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(251.902–298.9 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Lopingian&action=edit&redlink=1" class="new" title="Lopingian (not yet started)">Lopingian (251.902–259.8 mya)</a></li> <li><a href="/w/index.php?title=Guadalupian&action=edit&redlink=1" class="new" title="Guadalupian (not yet started)">Guadalupian (259.8–272.3 mya)</a></li> <li><a href="/wiki/Cisuralian" title="Cisuralian">Cisuralian (272.3–298.9 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Carboniferous" title="Carboniferous">Carboniferous <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(298.9–358.9 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pennsylvanian" title="Pennsylvanian">Pennsylvanian (298.9–323.2 mya)</a></li> <li><a href="/wiki/Mississippian" class="mw-redirect" title="Mississippian">Mississippian (323.2–358.9 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Devonian" title="Devonian">Devonian <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(358.9–419.2 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Late_Devonian&action=edit&redlink=1" class="new" title="Late Devonian (not yet started)">Late (358.9–382.7 mya)</a></li> <li><a href="/w/index.php?title=Middle_Devonian&action=edit&redlink=1" class="new" title="Middle Devonian (not yet started)">Middle (382.7–393.3 mya)</a></li> <li><a href="/wiki/Early_Devonian" class="mw-redirect" title="Early Devonian">Early (393.3–419.2 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Silurian" title="Silurian">Silurian <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(419.2–443.8 Mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Pridoli_epoch&action=edit&redlink=1" class="new" title="Pridoli epoch (not yet started)">Pridoli (419.2–423.0 mya)</a></li> <li><a href="/w/index.php?title=Ludlow_epoch&action=edit&redlink=1" class="new" title="Ludlow epoch (not yet started)">Ludlow (423.0–427.4 mya)</a></li> <li><a href="/wiki/Wenlock_(Silurian)" class="mw-redirect" title="Wenlock (Silurian)">Wenlock (427.4–433.4 mya)</a></li> <li><a href="/w/index.php?title=Llandovery_epoch&action=edit&redlink=1" class="new" title="Llandovery epoch (not yet started)">Llandovery (433.4–443.8 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Ordovician" title="Ordovician">Ordovician <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(443.8–485.4 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Late_Ordovician&action=edit&redlink=1" class="new" title="Late Ordovician (not yet started)">Late (443.8–458.4 mya)</a></li> <li><a href="/w/index.php?title=Middle_Ordovician&action=edit&redlink=1" class="new" title="Middle Ordovician (not yet started)">Middle (458.4–470.0 mya)</a></li> <li><a href="/w/index.php?title=Early_Ordovician&action=edit&redlink=1" class="new" title="Early Ordovician (not yet started)">Early (470.0–485.4 mya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Cambrian" title="Cambrian">Cambrian <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(485.4–541.0 mya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Furongian&action=edit&redlink=1" class="new" title="Furongian (not yet started)">Furongian (485.4–497 mya)</a></li> <li><a href="/w/index.php?title=Miaolingian&action=edit&redlink=1" class="new" title="Miaolingian (not yet started)">Miaolingian (497–509 mya)</a></li> <li><a href="/w/index.php?title=Cambrian_Series_2&action=edit&redlink=1" class="new" title="Cambrian Series 2 (not yet started)">Series 2 (509–521 mya)</a></li> <li><a href="/w/index.php?title=Terreneuvian&action=edit&redlink=1" class="new" title="Terreneuvian (not yet started)">Terreneuvian (521–541.0 mya)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Proterozoic" title="Proterozoic">Proterozoic eon<br /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(541.0 mya–2.5 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Neoproterozoic" title="Neoproterozoic">Neoproterozoic era <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(541.0 mya–1 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ediacaran" title="Ediacaran">Ediacaran (541.0–~635 mya)</a></li> <li><a href="/wiki/Cryogenian" title="Cryogenian">Cryogenian (~635–~720 mya)</a></li> <li><a href="/wiki/Tonian" title="Tonian">Tonian (~720 mya–1 Gya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Mesoproterozoic" title="Mesoproterozoic">Mesoproterozoic era <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(1–1.6 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stenian" title="Stenian">Stenian (1–1.2 Gya)</a></li> <li><a href="/wiki/Ectasian" title="Ectasian">Ectasian (1.2–1.4 Gya)</a></li> <li><a href="/wiki/Calymmian" title="Calymmian">Calymmian (1.4–1.6 Gya)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:20.5em"><a href="/wiki/Palaeoproterozoic" title="Palaeoproterozoic">Palaeoproterozoic era <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(1.6–2.5 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Statherian" title="Statherian">Statherian (1.6–1.8 Gya)</a></li> <li><a href="/wiki/Orosirian" title="Orosirian">Orosirian (1.8–2.05 Gya)</a></li> <li><a href="/wiki/Rhyacian" title="Rhyacian">Rhyacian (2.05–2.3 Gya)</a></li> <li><a href="/wiki/Siderian" title="Siderian">Siderian (2.3–2.5 Gya)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Archean" class="mw-redirect" title="Archean">Archean eon <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(2.5–4 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Eras" scope="row" class="navbox-group" style="width:20.5em">Eras</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Neoarchean" class="mw-redirect" title="Neoarchean">Neoarchean (2.5–2.8 Gya)</a></li> <li><a href="/wiki/Mesoarchean" class="mw-redirect" title="Mesoarchean">Mesoarchean (2.8–3.2 Gya)</a></li> <li><a href="/w/index.php?title=Palaeoarchean&action=edit&redlink=1" class="new" title="Palaeoarchean (not yet started)">Palaeoarchean (3.2–3.6 Gya)</a></li> <li><a href="/wiki/Eoarchean" class="mw-redirect" title="Eoarchean">Eoarchean (3.6–4 Gya)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hadean" title="Hadean">Hadean eon <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r6670383"><span class="nobold">(4–4.6 Gya)</span></a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:20.5em"> </th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="/w/index.php?title=Tya_(unit)&action=edit&redlink=1" class="new" title="Tya (unit) (not yet started)">kya</a> = thousands years ago. <a href="/wiki/Mya_(unit)" title="Mya (unit)">mya</a> = millions years ago. <a href="/w/index.php?title=Billion_years&action=edit&redlink=1" class="new" title="Billion years (not yet started)">Gya</a> = billions years ago. <br /><i>See also:</i> <a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geologic time scale</a>,</div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://simple.wikipedia.org/w/index.php?title=Middle_Jurassic&oldid=8329684">https://simple.wikipedia.org/w/index.php?title=Middle_Jurassic&oldid=8329684</a>"</div></div> <div 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