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[o]" accesskey="o" class=""><span>Logg inn</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Fleire val" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personlege verktøy" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-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-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personlege verktøy</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Brukarmeny" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_nn.wikipedia.org&uselang=nn"><span>Gåver</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spesial:Opprett_konto&returnto=Arkeikum" title="Me oppfordrar til at du oppretter ein konto og loggar inn, men det er ikkje påkravd."><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Opprett konto</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spesial:Logg_inn&returnto=Arkeikum" title="Det er ikkje obligatorisk å logga inn, men medfører mange fordelar. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Logg inn</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Sider for utlogga bidragsytarar <a href="/wiki/Hjelp:Introduksjon" aria-label="Lær meir om redigering"><span>lær meir</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Spesial:Bidraga_mine" title="Liste over endringar gjorde frå denne IP-adressa [y]" accesskey="y"><span>Bidrag</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Spesial:Diskusjonssida_mi" title="Diskusjon om endringar gjorde av denne ip-adressa [n]" accesskey="n"><span>Diskusjon</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Nettstad"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Innhald" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innhald</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">gøym</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Byrjinga</div> </a> </li> <li id="toc-Jorda_i_arkeikum" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Jorda_i_arkeikum"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Jorda i arkeikum</span> </div> </a> <button aria-controls="toc-Jorda_i_arkeikum-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>Vis/skjul underseksjonen Jorda i arkeikum</span> </button> <ul id="toc-Jorda_i_arkeikum-sublist" class="vector-toc-list"> <li id="toc-Miljø_i_arkeikum" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Miljø_i_arkeikum"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Miljø i arkeikum</span> </div> </a> <ul id="toc-Miljø_i_arkeikum-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Geologi_i_arkeikum" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Geologi_i_arkeikum"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Geologi i arkeikum</span> </div> </a> <ul id="toc-Geologi_i_arkeikum-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Liv_i_arkeikum" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Liv_i_arkeikum"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Liv i arkeikum</span> </div> </a> <ul id="toc-Liv_i_arkeikum-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kjelder" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kjelder"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Kjelder</span> </div> </a> <ul id="toc-Kjelder-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bakgrunnsstoff" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bakgrunnsstoff"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Bakgrunnsstoff</span> </div> </a> <ul id="toc-Bakgrunnsstoff-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="Innhald" 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="Vis/skjul innhaldslista" > <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">Vis/skjul innhaldslista</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">Arkeikum</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="Gå til ein artikkel på eit anna språk. Tilgjengeleg på 76 språk" > <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-76" 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">76 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Arkeikum" title="Arkeikum – norsk bokmål" lang="nb" hreflang="nb" data-title="Arkeikum" data-language-autonym="Norsk bokmål" data-language-local-name="norsk bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Arkeikum" title="Arkeikum – svensk" lang="sv" hreflang="sv" data-title="Arkeikum" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Ark%C3%A6ikum" title="Arkæikum – dansk" lang="da" hreflang="da" data-title="Arkæikum" data-language-autonym="Dansk" data-language-local-name="dansk" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Arge%C3%AFkum" title="Argeïkum – afrikaans" lang="af" hreflang="af" data-title="Argeïkum" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%84%D8%AF%D9%87%D8%B1_%D8%A7%D9%84%D8%B3%D8%AD%D9%8A%D9%82" title="الدهر السحيق – arabisk" lang="ar" hreflang="ar" data-title="الدهر السحيق" data-language-autonym="العربية" data-language-local-name="arabisk" 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/Arxey" title="Arxey – aserbajdsjansk" lang="az" hreflang="az" data-title="Arxey" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%86%E0%A6%B0%E0%A7%8D%E0%A6%95%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%A8" title="আর্কিয়ান – bengali" lang="bn" hreflang="bn" data-title="আর্কিয়ান" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-map-bms mw-list-item"><a href="https://map-bms.wikipedia.org/wiki/Arkeozoikum" title="Arkeozoikum – banyumasan" lang="jv-x-bms" hreflang="jv-x-bms" data-title="Arkeozoikum" data-language-autonym="Basa Banyumasan" data-language-local-name="banyumasan" class="interlanguage-link-target"><span>Basa Banyumasan</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9" title="Архей – belarusisk" lang="be" hreflang="be" data-title="Архей" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B0%D0%B9" title="Архай – bulgarsk" lang="bg" hreflang="bg" data-title="Архай" data-language-autonym="Български" data-language-local-name="bulgarsk" 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/Arhaik" title="Arhaik – bosnisk" lang="bs" hreflang="bs" data-title="Arhaik" data-language-autonym="Bosanski" data-language-local-name="bosnisk" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Arkean" title="Arkean – bretonsk" lang="br" hreflang="br" data-title="Arkean" data-language-autonym="Brezhoneg" data-language-local-name="bretonsk" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Arque%C3%A0" title="Arqueà – katalansk" lang="ca" hreflang="ca" data-title="Arqueà" data-language-autonym="Català" data-language-local-name="katalansk" 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/Archaikum" title="Archaikum – tsjekkisk" lang="cs" hreflang="cs" data-title="Archaikum" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Archeaidd" title="Archeaidd – walisisk" lang="cy" hreflang="cy" data-title="Archeaidd" data-language-autonym="Cymraeg" data-language-local-name="walisisk" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Archaikum" title="Archaikum – tysk" lang="de" hreflang="de" data-title="Archaikum" data-language-autonym="Deutsch" data-language-local-name="tysk" 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/Arhaikum" title="Arhaikum – estisk" lang="et" hreflang="et" data-title="Arhaikum" data-language-autonym="Eesti" data-language-local-name="estisk" 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%91%CF%81%CF%87%CE%B1%CE%B9%CE%BF%CE%B6%CF%89%CE%B9%CE%BA%CF%8C%CF%82_%CE%BC%CE%B5%CE%B3%CE%B1%CE%B1%CE%B9%CF%8E%CE%BD%CE%B1%CF%82" title="Αρχαιοζωικός μεγααιώνας – gresk" lang="el" hreflang="el" data-title="Αρχαιοζωικός μεγααιώνας" data-language-autonym="Ελληνικά" data-language-local-name="gresk" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Archean" title="Archean – engelsk" lang="en" hreflang="en" data-title="Archean" data-language-autonym="English" data-language-local-name="engelsk" 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/E%C3%B3n_arcaico" title="Eón arcaico – spansk" lang="es" hreflang="es" data-title="Eón arcaico" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Arkeano" title="Arkeano – esperanto" lang="eo" hreflang="eo" data-title="Arkeano" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Arkear" title="Arkear – baskisk" lang="eu" hreflang="eu" data-title="Arkear" data-language-autonym="Euskara" data-language-local-name="baskisk" 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/%D9%86%D8%AE%D8%B3%D8%AA%E2%80%8C%D8%B2%DB%8C%D8%B3%D8%AA%DB%8C" title="نخست‌زیستی – persisk" lang="fa" hreflang="fa" data-title="نخست‌زیستی" data-language-autonym="فارسی" data-language-local-name="persisk" 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/Arch%C3%A9en" title="Archéen – fransk" lang="fr" hreflang="fr" data-title="Archéen" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/An_tAe%C3%B3n_Airc%C3%A9ach" title="An tAeón Aircéach – irsk" lang="ga" hreflang="ga" data-title="An tAeón Aircéach" data-language-autonym="Gaeilge" data-language-local-name="irsk" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Arcaico" title="Arcaico – galisisk" lang="gl" hreflang="gl" data-title="Arcaico" data-language-autonym="Galego" data-language-local-name="galisisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%8B%9C%EC%83%9D%EB%88%84%EB%8C%80" title="시생누대 – koreansk" lang="ko" hreflang="ko" data-title="시생누대" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B1%D6%80%D5%AD%D5%A5%D5%B5%D5%A1%D5%B6_%D5%A4%D5%A1%D6%80%D5%A1%D5%B7%D6%80%D5%BB%D5%A1%D5%B6" title="Արխեյան դարաշրջան – armensk" lang="hy" hreflang="hy" data-title="Արխեյան դարաշրջան" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%95%E0%A4%BF%E0%A4%AF%E0%A4%BE%E0%A4%88_%E0%A4%87%E0%A4%93%E0%A4%A8" title="आर्कियाई इओन – hindi" lang="hi" hreflang="hi" data-title="आर्कियाई इओन" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Arhaik" title="Arhaik – kroatisk" lang="hr" hreflang="hr" data-title="Arhaik" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" 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/Arkaikum" title="Arkaikum – indonesisk" lang="id" hreflang="id" data-title="Arkaikum" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" 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/Upphafs%C3%B6ld" title="Upphafsöld – islandsk" lang="is" hreflang="is" data-title="Upphafsöld" data-language-autonym="Íslenska" data-language-local-name="islandsk" 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/Archeano" title="Archeano – italiensk" lang="it" hreflang="it" data-title="Archeano" data-language-autonym="Italiano" data-language-local-name="italiensk" 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%90%D7%A8%D7%9B%D7%90%D7%99%D7%A7%D7%95%D7%9F" title="ארכאיקון – hebraisk" lang="he" hreflang="he" data-title="ארכאיקון" data-language-autonym="עברית" data-language-local-name="hebraisk" 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%86%E0%B2%B0%E0%B3%8D%E0%B2%95%E0%B2%BF%E0%B2%AF%E0%B2%A8%E0%B3%8D_%E0%B2%95%E0%B2%B2%E0%B3%8D%E0%B2%AA" title="ಆರ್ಕಿಯನ್ ಕಲ್ಪ – kannada" lang="kn" hreflang="kn" data-title="ಆರ್ಕಿಯನ್ ಕಲ್ಪ" 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%90%E1%83%A0%E1%83%A5%E1%83%94%E1%83%A3%E1%83%9A%E1%83%98_%E1%83%94%E1%83%A0%E1%83%90" title="არქეული ერა – georgisk" lang="ka" hreflang="ka" data-title="არქეული ერა" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9" title="Архей – kasakhisk" lang="kk" hreflang="kk" data-title="Архей" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-avk mw-list-item"><a href="https://avk.wikipedia.org/wiki/Arxea" title="Arxea – kotava" lang="avk" hreflang="avk" data-title="Arxea" data-language-autonym="Kotava" data-language-local-name="kotava" class="interlanguage-link-target"><span>Kotava</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Archaicum" title="Archaicum – latin" lang="la" hreflang="la" data-title="Archaicum" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Arhajs" title="Arhajs – latvisk" lang="lv" hreflang="lv" data-title="Arhajs" data-language-autonym="Latviešu" data-language-local-name="latvisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Arch%C4%97jus" title="Archėjus – litauisk" lang="lt" hreflang="lt" data-title="Archėjus" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Arcaica" title="Arcaica – lingua franca nova" lang="lfn" hreflang="lfn" data-title="Arcaica" data-language-autonym="Lingua Franca Nova" data-language-local-name="lingua franca nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Archaikum" title="Archaikum – ungarsk" lang="hu" hreflang="hu" data-title="Archaikum" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A7%D8%B1%D9%83%D9%8A%D8%A7" title="اركيا – egyptisk arabisk" lang="arz" hreflang="arz" data-title="اركيا" data-language-autonym="مصرى" data-language-local-name="egyptisk arabisk" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Arkean" title="Arkean – malayisk" lang="ms" hreflang="ms" data-title="Arkean" data-language-autonym="Bahasa Melayu" data-language-local-name="malayisk" 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/Arche%C3%AFcum" title="Archeïcum – nederlandsk" lang="nl" hreflang="nl" data-title="Archeïcum" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" 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/%E5%A4%AA%E5%8F%A4%E4%BB%A3" title="太古代 – japansk" lang="ja" hreflang="ja" data-title="太古代" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Archaikum" title="Archaikum – nordfrisisk" lang="frr" hreflang="frr" data-title="Archaikum" data-language-autonym="Nordfriisk" data-language-local-name="nordfrisisk" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Arquean" title="Arquean – oksitansk" lang="oc" hreflang="oc" data-title="Arquean" data-language-autonym="Occitan" data-language-local-name="oksitansk" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Arxey" title="Arxey – usbekisk" lang="uz" hreflang="uz" data-title="Arxey" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A2%D8%B1%DA%A9%DB%8C%D9%86" title="آرکین – vestpunjabi" lang="pnb" hreflang="pnb" data-title="آرکین" data-language-autonym="پنجابی" data-language-local-name="vestpunjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Archaikum" title="Archaikum – lågtysk" lang="nds" hreflang="nds" data-title="Archaikum" data-language-autonym="Plattdüütsch" data-language-local-name="lågtysk" 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/Archaik" title="Archaik – polsk" lang="pl" hreflang="pl" data-title="Archaik" data-language-autonym="Polski" data-language-local-name="polsk" 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/Arqueano" title="Arqueano – portugisisk" lang="pt" hreflang="pt" data-title="Arqueano" data-language-autonym="Português" data-language-local-name="portugisisk" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Arhaic" title="Arhaic – rumensk" lang="ro" hreflang="ro" data-title="Arhaic" data-language-autonym="Română" data-language-local-name="rumensk" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9" title="Архей – russisk" lang="ru" hreflang="ru" data-title="Архей" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9,_(%D0%B3%D0%B5%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Архей, (геология) – sakha" lang="sah" hreflang="sah" data-title="Архей, (геология)" data-language-autonym="Саха тыла" data-language-local-name="sakha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Archean" title="Archean – skotsk" lang="sco" hreflang="sco" data-title="Archean" data-language-autonym="Scots" data-language-local-name="skotsk" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%86%E0%B6%9A%E0%B7%92%E0%B6%BA%E0%B7%8F%E0%B6%B1%E0%B7%94" title="ආකියානු – singalesisk" lang="si" hreflang="si" data-title="ආකියානු" data-language-autonym="සිංහල" data-language-local-name="singalesisk" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Archaean" title="Archaean – enkel engelsk" lang="en-simple" hreflang="en-simple" data-title="Archaean" data-language-autonym="Simple English" data-language-local-name="enkel engelsk" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Archaikum" title="Archaikum – slovakisk" lang="sk" hreflang="sk" data-title="Archaikum" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Arhaik" title="Arhaik – slovensk" lang="sl" hreflang="sl" data-title="Arhaik" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Arkeyaan" title="Arkeyaan – somali" lang="so" hreflang="so" data-title="Arkeyaan" data-language-autonym="Soomaaliga" data-language-local-name="somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B0%D0%B8%D0%BA" title="Архаик – serbisk" lang="sr" hreflang="sr" data-title="Архаик" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh badge-Q70893996 mw-list-item" title=""><a href="https://sh.wikipedia.org/wiki/Arhej" title="Arhej – serbokroatisk" lang="sh" hreflang="sh" data-title="Arhej" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" 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/Arkeeinen_eoni" title="Arkeeinen eoni – finsk" lang="fi" hreflang="fi" data-title="Arkeeinen eoni" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-tl badge-Q70893996 mw-list-item" title=""><a href="https://tl.wikipedia.org/wiki/Archean" title="Archean – tagalog" lang="tl" hreflang="tl" data-title="Archean" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9" title="Архей – tatarisk" lang="tt" hreflang="tt" data-title="Архей" data-language-autonym="Татарча / tatarça" data-language-local-name="tatarisk" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9A%E0%B8%A3%E0%B8%A1%E0%B8%A2%E0%B8%B8%E0%B8%84%E0%B8%AD%E0%B8%B2%E0%B8%A3%E0%B9%8C%E0%B9%80%E0%B8%84%E0%B8%B5%E0%B8%A2%E0%B8%99" title="บรมยุคอาร์เคียน – thai" lang="th" hreflang="th" data-title="บรมยุคอาร์เคียน" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%90%D1%80%D1%85%D0%B5%D0%B9" title="Архей – tadsjikisk" lang="tg" hreflang="tg" data-title="Архей" data-language-autonym="Тоҷикӣ" data-language-local-name="tadsjikisk" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Arkeen" title="Arkeen – tyrkisk" lang="tr" hreflang="tr" data-title="Arkeen" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" 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%90%D1%80%D1%85%D0%B5%D0%B9%D1%81%D1%8C%D0%BA%D0%B8%D0%B9_%D0%B5%D0%BE%D0%BD" title="Архейський еон – ukrainsk" lang="uk" hreflang="uk" data-title="Архейський еон" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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/Li%C3%AAn_%C4%91%E1%BA%A1i_Th%C3%A1i_c%E1%BB%95" title="Liên đại Thái cổ – vietnamesisk" lang="vi" hreflang="vi" data-title="Liên đại Thái cổ" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%A4%AA%E5%8F%A4%E5%AE%99" title="太古宙 – wu" lang="wuu" hreflang="wuu" data-title="太古宙" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%A4%AA%E5%8F%A4%E5%AE%99" title="太古宙 – kantonesisk" lang="yue" hreflang="yue" data-title="太古宙" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%A4%AA%E5%8F%A4%E5%AE%99" title="太古宙 – kinesisk" lang="zh" hreflang="zh" data-title="太古宙" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q104168#sitelinks-wikipedia" title="Endra mellomspråklege lenkjer" class="wbc-editpage">Endra lenkjer</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namnerom"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Arkeikum" title="Vis innhaldssida [c]" accesskey="c"><span>Artikkel</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Diskusjon:Arkeikum&action=edit&redlink=1" rel="discussion" class="new" title="Diskusjon om innhaldssida (sida finst ikkje) [t]" accesskey="t"><span>Diskusjon</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" 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mw-list-item"><a href="/w/index.php?title=Arkeikum&action=edit" title="Endre kjeldekoden til sida [e]" accesskey="e"><span>Endre wikiteksten</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Arkeikum&action=history"><span>Sjå historikken</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Ålment </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Spesial:Lenkjer_hit/Arkeikum" title="Liste over alle wikisidene som har lenkjer hit [j]" accesskey="j"><span>Lenkjer hit</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Spesial:Relaterte_endringar/Arkeikum" rel="nofollow" title="Nylege endringar på sider denne sida lenkjar til [k]" accesskey="k"><span>Relaterte endringar</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=nn" title="Last opp filer [u]" accesskey="u"><span>Last opp fil</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Spesial:Spesialsider" title="Liste over spesialsider [q]" accesskey="q"><span>Spesialsider</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Arkeikum&oldid=3540323" title="Fast lenkje til denne versjonen av sida"><span>Fast lenkje</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Arkeikum&action=info" title="Meir informasjon om sida"><span>Sideinformasjon</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Spesial:Siter&page=Arkeikum&id=3540323&wpFormIdentifier=titleform" title="Informasjon om korleis ein siterer denne sida"><span>Siter denne sida</span></a></li><li id="t-urlshortener" class="mw-list-item"><a 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href="/w/index.php?title=Arkeikum&printable=yes" title="Utskriftsversjon av sida [p]" accesskey="p"><span>Utskriftsversjon</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="Sideverktøy"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Utsjånad"> <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">Utsjånad</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">gøym</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">Frå Wikipedia – det frie oppslagsverket</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="nn" dir="ltr"><table class="wikitable" align="right" style="margin-left:1em; width:em"> <tbody><tr> <td align="center" colspan="2" style="background-color:rgb(226,0,122)"><b>Arkeikum</b><br /><i>3800 - 2500 million år sidan</i> </td></tr> <tr> <td align="center" colspan="2"><div id="Container" class="toccolours" style="text-align: left; padding:0.5em 0 0 0; border-style:none; ; padding:0 0.5em; margin:auto;"><div id="Title" style="background-color:rgb(226,0,122); font-weight:bold; padding:0.2em; text-align:center; margin:0.6em 0 1.2em 0">Geologiske periodar</div><div id="Contains-Timeline-Scale-Notes"><div style="text-align:right; position:relative; top:-1em;"><small><a href="/wiki/Mal:Eon_grafisk_tidslinje" title="Mal:Eon grafisk tidslinje"><span style="color:#002bb8;" title="Sjå denen tidslinja på ei eiga side">sjå</span></a> • <a href="/w/index.php?title=Maldiskusjon:Eon_grafisk_tidslinje&action=edit&redlink=1" class="new" title="Maldiskusjon:Eon grafisk tidslinje (sida finst ikkje)"><span style="color:#002bb8;" title="Diskuter denne malen">diskuter</span></a> • <span class="noprint plainlinksneverexpand" style="color:#002bb8;" title="Du kan endre denen tidslinja. Bruk førehandsvis før du lagrar."><a class="external text" href="https://nn.wikipedia.org/w/index.php?title=Mal:Eon_grafisk_tidslinje&action=edit">endre</a></span></small></div><div id="Scale" style="width:3.1em; position:relative; top:-0.82em; float:left; height:36em; padding:0px"><div style="float:right; position:absolute; right:-1px; top:35.470543027739em;"><span style="font-size:86%;white-space:nowrap;">-4500 —</span></div><div style="float:right; position:absolute; right:-1px; top:33.499957303976em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:31.529371580213em;"><span style="font-size:86%;white-space:nowrap;">-4000 —</span></div><div style="float:right; position:absolute; right:-1px; top:29.558785856449em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:27.588200132686em;"><span style="font-size:86%;white-space:nowrap;">-3500 —</span></div><div style="float:right; position:absolute; right:-1px; top:25.617614408923em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:23.64702868516em;"><span style="font-size:86%;white-space:nowrap;">-3000 —</span></div><div style="float:right; position:absolute; right:-1px; top:21.676442961396em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:19.705857237633em;"><span style="font-size:86%;white-space:nowrap;">-2500 —</span></div><div style="float:right; position:absolute; right:-1px; top:17.73527151387em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:15.764685790106em;"><span style="font-size:86%;white-space:nowrap;">-2000 —</span></div><div style="float:right; position:absolute; right:-1px; top:13.794100066343em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:11.82351434258em;"><span style="font-size:86%;white-space:nowrap;">-1500 —</span></div><div style="float:right; position:absolute; right:-1px; top:9.8529286188165em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:7.8823428950532em;"><span style="font-size:86%;white-space:nowrap;">-1000 —</span></div><div style="float:right; position:absolute; right:-1px; top:5.9117571712899em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:3.9411714475266em;"><span style="font-size:86%;white-space:nowrap;">-500 —</span></div><div style="float:right; position:absolute; right:-1px; top:1.9705857237633em;"><span style="font-size:86%;white-space:nowrap;">–</span></div><div style="float:right; position:absolute; right:-1px; top:0em;"><span style="font-size:86%;white-space:nowrap;">0 —</span></div></div><div id="ScaleBar" style="width:1px; float:left; height:36em; padding:0; background-color:#242020"></div><div id="Timeline" class="toccolours" style="font-size:100%; width:100%; height:36em; padding:0px; float:left; width:6.8em; border:none; background-color:;"><div class="bar" style="font-size:100%; background-color:rgb(221,47,135); border-width:0.04em; border-style:solid none; position:absolute; text-align:center; margin-top:29.952903001202em; height:5.9670969987979em; margin-left:0em; width:3.944em;"><div class="nudge" style="font-size:100%; position:relative; top:-0.86em; left:-0em;"><span style="position:relative; align:center; vertical-align:middle; bottom:-3.023548499399em;"><span style="font-size:90%"><a href="/wiki/Hadeikum" title="Hadeikum">Hadeikum</a></span></span></div></div><div class="bar" style="font-size:100%; background-color:rgb(226,0,122); border-width:0.04em; border-style:solid none; position:absolute; text-align:center; margin-top:19.705857237633em; height:10.167045763569em; margin-left:0em; width:3.944em;"><div class="nudge" style="font-size:100%; position:relative; top:-0.86em; left:-0em;"><span style="position:relative; align:center; vertical-align:middle; bottom:-5.1235228817846em;"><span style="font-size:90%"><a class="mw-selflink selflink">Arkeikum</a></span></span></div></div><div class="bar" style="font-size:100%; background-color:rgb(232,82,113); border-width:0.04em; border-style:solid none; position:absolute; text-align:center; margin-top:4.2722298491188em; height:15.353627388514em; margin-left:0em; width:3.944em;"><div class="nudge" style="font-size:100%; position:relative; top:-1.61em; left:-0em;"><span style="position:relative; align:center; vertical-align:middle; bottom:-7.7168136942571em;"><a href="/wiki/Proterozoikum" title="Proterozoikum">Protero<br />-zoikum</a></span></div></div><div class="bar" style="font-size:100%; background-color:rgb(154,217,221); border-width:0.04em; border-style:solid none; position:absolute; text-align:center; margin-top:0em; height:4.1922298491188em; margin-left:0em; width:3.944em;"><div class="nudge" style="font-size:100%; 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font-size:100%; position:absolute; text-align:center; margin-top:18em;"><div id="nudge" style="text-size:100%; float:left; position:relative; text-align:left; top:-0.75em; left:-0em; width:0em;"><span style="position:relative; width:auto; font-size:90%; color:black; vertical-align:middle; line-height:100%; bottom:0;"></span></div></div><div id="bar" style="width:auto; font-size:100%; position:absolute; text-align:center; margin-top:18em;"><div id="nudge" style="text-size:100%; float:left; position:relative; text-align:left; top:-0.75em; left:-0em; width:7em;"><span style="position:relative; width:auto; font-size:90%; color:black; vertical-align:middle; line-height:100%; bottom:0;"></span></div></div></div></div><div id="Legend" class="toccolours" style="margin-left:3.1em; border-style:none; float:left; clear:both;"></div><div id="Caption" class="toccolours" style="margin:0 auto; padding:0 auto; border-style:none; clear:both; text-align:center; width:11.3em">Skala:<br />Millionar år sidan</div></div> </td></tr></tbody></table> <p><b>Arkeikum</b> er eit geologisk <a href="/wiki/Eon" title="Eon">eon</a> som kom før <a href="/wiki/Proterozoikum" title="Proterozoikum">proterozoikum</a> og <a href="/wiki/Paleoproterozoikum" title="Paleoproterozoikum">paleoproterozoikum</a>, i tida eldre enn 2,5 milliardar år sidan. I staden for å basere seg på <a href="/wiki/Stratigrafi" title="Stratigrafi">stratigrafi</a> er denne datoen definert <a href="/wiki/Kronometrisk" class="mw-redirect" title="Kronometrisk">kronometrisk</a>. Den nedre grensa (starttidspunktet) er ikkje offisielt godkjend av <a href="/wiki/International_Commission_on_Stratigraphy" title="International Commission on Stratigraphy">International Commission on Stratigraphy</a>, men vert vanlegvis sett til 3,8 milliardar år sida, ved slutten av eonet <a href="/wiki/Hadeikum" title="Hadeikum">hadeikum</a>. I eldre litteratur vart hadeikum rekna som ein del av arkeikum. Namnet kjem frå det <a href="/wiki/Gammalgresk" class="mw-redirect" title="Gammalgresk">gammalgreske</a> Αρχή (<a href="/wiki/Arkhe" title="Arkhe">arkhē</a>) og tyder 'byrjing, opphav'. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Jorda_i_arkeikum">Jorda i arkeikum</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=1" title="Endre bolk: Jorda i arkeikum" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=1" title="Rediger kildekoden til seksjonen Jorda i arkeikum"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Prototierra_Planetario_Medell%C3%ADn.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Prototierra_Planetario_Medell%C3%ADn.JPG/220px-Prototierra_Planetario_Medell%C3%ADn.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Prototierra_Planetario_Medell%C3%ADn.JPG/330px-Prototierra_Planetario_Medell%C3%ADn.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/39/Prototierra_Planetario_Medell%C3%ADn.JPG/440px-Prototierra_Planetario_Medell%C3%ADn.JPG 2x" data-file-width="2848" data-file-height="2134" /></a><figcaption>Rekonstruksjon av jorda i arkeikum ved <a href="/wiki/Planetarium" title="Planetarium">planetariet</a> i <a href="/wiki/Medell%C3%ADn" title="Medellín">Medellín</a>.</figcaption></figure> <p>Ved byrjinga av arkeikum var varmestraumen frå jorda om lag tre gonger så høg som i dag, og var framleis dobbelt så høg som på byrjinga av <a href="/wiki/Proterozoikum" title="Proterozoikum">proterozoikum</a> (2,5 milliardar år sidan). Den ekstra varmen kan ha vore restar av varmen frå då planeten vart danna, delvis varme frå danninga av jernkjerna, og delvis på grunn av større radiogen varme produsert av kortvarige radionuklidar som <a href="/wiki/Uran" title="Uran">uran</a>-235. </p><p>Det meste av <a href="/wiki/Bergart" title="Bergart">bergartar</a> frå arkeikum som framleis eksisterer er <a href="/wiki/Metamorf_bergart" title="Metamorf bergart">metamorfe</a> og <a href="/wiki/Vulkansk_bergart" class="mw-redirect" title="Vulkansk bergart">vulkanske bergartar</a>. Den <a href="/wiki/Vulkan" title="Vulkan">vulkanske</a> aktiviteten var mykje større på denne tida enn i dag, med mange <a href="/w/index.php?title=Heitepunkt&action=edit&redlink=1" class="new" title="Heitepunkt (sida finst ikkje)">heitepunkt</a>, <a href="/wiki/Riftdal" class="mw-redirect" title="Riftdal">riftdalar</a> og utbrot av forskjellig lava, som den uvanlege <a href="/wiki/Komatiitt" title="Komatiitt">komatiitt</a>-lavaen. I dei <a href="/wiki/Kraton" title="Kraton">kratonske</a> krystallrestane i berglaga frå arkeikum som eksisterer i dag er det mykje intrusjon av vulkanske bergartar. Dette er magma som har trengt inn i bergartane, men storkna før dei braut ut på jordoverflata. Døme på bergartar frå perioden er store smelta lag og omfangsrike plutoniske massar av <a href="/wiki/Granitt" title="Granitt">granitt</a>, <a href="/wiki/Dioritt" title="Dioritt">dioritt</a>, <a href="/w/index.php?title=Ultramafiske_til_mafiske_intrusjonslag&action=edit&redlink=1" class="new" title="Ultramafiske til mafiske intrusjonslag (sida finst ikkje)">ultramafiske til mafiske intrusjonslag</a>, <a href="/wiki/Anortositt" title="Anortositt">anortosittar</a> og <a href="/w/index.php?title=Monozonitt&action=edit&redlink=1" class="new" title="Monozonitt (sida finst ikkje)">monozonittar</a> kalla <a href="/w/index.php?title=Sanukitoidar&action=edit&redlink=1" class="new" title="Sanukitoidar (sida finst ikkje)">sanukitoidar</a> </p><p>Jorda i tidleg arkeiukum kan ha hatt ei forskjellig tekotonisk form. Enkelte forskarar meiner at fordi jorda var varmare, var <a href="/wiki/Platetektonikk" title="Platetektonikk">platetektonikken</a> meir aktiv enn i dag, og dette førte til større resirkulering av jordskorpa. Denne kan ha hindra <a href="/wiki/Kraton" title="Kraton">kratonisering</a> og danning av kontinent før mantelen vart avkjølt og <a href="/wiki/Konveksjon" title="Konveksjon">konveksjonen</a> minka. Andre meiner den subkontinentale <a href="/wiki/Litosf%C3%A6ren" title="Litosfæren">litosfæriske</a> mantelen var for flytande til å <a href="/w/index.php?title=Subduksjon&action=edit&redlink=1" class="new" title="Subduksjon (sida finst ikkje)">subdusere</a>, og at mangelen på bergartar frå arkeikum i dag kjem av erosjon frå tektonisk aktivitet i nyare tid. Problemstillinga om det eksisterte platetektonikk eller ikkje i arkeikum er i dag eit forskingsområde innan geovitskap.<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> </p><p>Det fanst ingen store kontinent før seint i arkeikum. Små <i>protokontinent</i> var vanleg, men stor geologisk aktivitet hindra dei i å samle seg saman. Desse <a href="/wiki/Felsisk" class="mw-redirect" title="Felsisk">felsiske</a> protokontinenta oppstod truleg rundt <a href="/wiki/Heiteflekk" class="mw-redirect" title="Heiteflekk">heiteflekker</a> og ikkje ved <a href="/wiki/Subduksjonssone" class="mw-redirect" title="Subduksjonssone">subduksjonssoner</a>. Dei oppstod ved <a href="/w/index.php?title=Magmadifferensiering&action=edit&redlink=1" class="new" title="Magmadifferensiering (sida finst ikkje)">magmadifferensiering</a> av mafiske bergartar som produserte intermediære eller mafiske bergartar, mafisk magma som smelta meir felsisk stein og tvinga <a href="/w/index.php?title=Granittisering&action=edit&redlink=1" class="new" title="Granittisering (sida finst ikkje)">granittisering</a> av intermediære bergartar, <a href="/wiki/Magma" title="Magma">delvis smelting</a> av mafiske bergartar, og metamorfisk endring av felsiske sedimentære bergartar. Slike bitar av kontinent har truleg ikkje vortne bevart, med mindre dei var flytande nok eller heldige nok til å unngå kraftige subduksjonssoner.<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> </p><p>Ei forklåring på den generelle mangelen på bergartar frå hadeikum (eldre enn 3,8 milliardar år) er dei store mengdene av stoff frå utanfor solsystemet som fanst i det unge solsystemet. Sjølv etter planeten oppstod eksisterte det store mengder <a href="/wiki/Asteroide" title="Asteroide">asteroidar</a> og <a href="/wiki/Meteoritt" title="Meteoritt">meteorittar</a> og desse bombarderte Jorda fram til om lag 3,8 milliardar år sidan. Ein periode med særleg store impaktorar vert kalla <a href="/w/index.php?title=Det_seine_tunge_bombardementet&action=edit&redlink=1" class="new" title="Det seine tunge bombardementet (sida finst ikkje)">det seine tunge bombardementet</a> og dette kan ha hindra danninga av jordskorpe ved at dei tidlege protokontinenta rett og slett vart knuste sunde. </p> <div class="mw-heading mw-heading3"><h3 id="Miljø_i_arkeikum"><span id="Milj.C3.B8_i_arkeikum"></span>Miljø i arkeikum</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=2" title="Endre bolk: Miljø i arkeikum" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=2" title="Rediger kildekoden til seksjonen Miljø i arkeikum"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Atmosæren under arkeikum ser ut til å ha mangla fritt <a href="/wiki/Oksygen" title="Oksygen">oksygen</a>. Temperaturane ser ut til å ha vorte nær dagens temperaturar frå om lag 500 millionar år etter jorda oppstod. Det eksisterte flytande vatn, noko ein ser på den sterkt deformerte <a href="/wiki/Gneis" title="Gneis">gneisen</a> produsert av omskaping av <a href="/wiki/Sediment" title="Sediment">sedimentære</a> <a href="/w/index.php?title=Protolitt&action=edit&redlink=1" class="new" title="Protolitt (sida finst ikkje)">protolittar</a>. Astronomar trur sola var om lag ein tredel svakare enn i dag, og dette kan ha medverka til lågare globale temperaturar enn ein elles kunne forventa. Dette trur ein kan ha ført til større mengder drivhusgassar enn seinare i historia til Jorda. </p><p>Mot slutten av arkeikum, for om lag 2,6 milliardar år sidan, kan den platetektoniske aktiviteten ha vore ganske lik det ein ser i dag. Det finst godt bevarte sedimentbasseng og spor av <a href="/wiki/Vulkanboge" title="Vulkanboge">vulkanbogar</a>, <a href="/wiki/Rift" title="Rift">rifter</a> på kontinent, kollisjonar mellom kontinent og omfattande global <a href="/wiki/Orogenese" title="Orogenese">orogenese</a>, som tyder på at eitt eller kanskje fleire <a href="/wiki/Superkontinent" title="Superkontinent">superkontinent</a> oppstod og vart øydelagde. Det eksisterte flytande vatn og ein veit det eksisterte djupe havbasseng på grunn av <a href="/w/index.php?title=Lagdelte_jernrike_bergartar&action=edit&redlink=1" class="new" title="Lagdelte jernrike bergartar (sida finst ikkje)">lagdelte jernrike bergartar</a>, lægje av <a href="/wiki/Chert" title="Chert">chert</a>, kjemiske sediment og <a href="/wiki/Putelava" title="Putelava">putebasalt</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Geologi_i_arkeikum">Geologi i arkeikum</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=3" title="Endre bolk: Geologi i arkeikum" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=3" title="Rediger kildekoden til seksjonen Geologi i arkeikum"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Canadianshield.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Canadianshield.gif/220px-Canadianshield.gif" decoding="async" width="220" height="229" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Canadianshield.gif/330px-Canadianshield.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/22/Canadianshield.gif/440px-Canadianshield.gif 2x" data-file-width="500" data-file-height="520" /></a><figcaption><a href="/w/index.php?title=Grunnfjellsskjoldet&action=edit&redlink=1" class="new" title="Grunnfjellsskjoldet (sida finst ikkje)">Grunnfjellsskjoldet</a> i Nord-Amerika har den største overflata av bergartar frå arkeikum i verda.</figcaption></figure> <p>Sjølv om ein kjenner til enkelte mineralkorn frå hadeikum, er dei eldste bergartane på jordoverflata frå arkeikum eller noko eldre. Bergartar frå arkeikum har ein funne på <a href="/wiki/Gr%C3%B8nland" title="Grønland">Grønland</a>, <a href="/w/index.php?title=Grunnfjellsskjoldet&action=edit&redlink=1" class="new" title="Grunnfjellsskjoldet (sida finst ikkje)">Grunnfjellsskjoldet</a>, <a href="/wiki/Det_baltiske_skjoldet" title="Det baltiske skjoldet">Det baltiske skjoldet</a>, <a href="/wiki/Skottland" title="Skottland">Skottland</a>, <a href="/wiki/India" title="India">India</a>, <a href="/wiki/Brasil" title="Brasil">Brasil</a>, <a href="/wiki/Vest-Australia" title="Vest-Australia">Vest-Australia</a> og det sørlege <a href="/wiki/Afrika" title="Afrika">Afrika</a>. Sjølv om dei fyrste <a href="/wiki/Kontinent" title="Kontinent">kontinenta</a> oppstod under dette <a href="/wiki/Eon" title="Eon">eonet</a>, utgjer bergartar frå denne tidsalderen berre 7 % av dei noverande <a href="/wiki/Kraton" title="Kraton">kratona</a> i verda, og erosjon og øydelegging av eldre bergartar kan ha skjedd. Spor tyder på at kontinental skorpe tilsvarande 5-40 % av den noverande jordskorpa oppstod under arkeikum.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>I motsetnad til proterozoikum, er bergartane frå arkeikum ofte kraftig omforma djuphavssediment, som <a href="/wiki/Gr%C3%A5vakke" title="Gråvakke">gråvakke</a>, <a href="/wiki/Leirstein" class="mw-redirect" title="Leirstein">leirstein</a>, vulkanske sediment, og <a href="/w/index.php?title=Lagdelte_jernrike_bergartar&action=edit&redlink=1" class="new" title="Lagdelte jernrike bergartar (sida finst ikkje)">lagdelte jernrike bergartar</a>. <a href="/wiki/Karbonat" title="Karbonat">Karbonatbergartar</a> er sjeldne, noko som indikerer at hava var surare på grunn av oppløyst <a href="/wiki/Karbondioksid" title="Karbondioksid">karbondioksid</a> enn i proterozoikum.<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> <a href="/w/index.php?title=Gr%C3%B8nsteinbelte&action=edit&redlink=1" class="new" title="Grønsteinbelte (sida finst ikkje)">Grønsteinbelta</a> er typiske formasjonar frå arkeikum og består av ulike lag av omforma mafiske vulkanske- og sedimentære bergartar. </p><p>I <a href="/wiki/Noreg" title="Noreg">Noreg</a> finn ein grunnfjellbergartar frå arkeikum i <a href="/wiki/Lofoten" title="Lofoten">Lofoten</a> og <a href="/wiki/Finnmark" class="mw-redirect" title="Finnmark">Finnmark</a>. <sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Liv_i_arkeikum">Liv i arkeikum</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=4" title="Endre bolk: Liv i arkeikum" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=4" title="Rediger kildekoden til seksjonen Liv i arkeikum"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Stromatolites_in_Sharkbay.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Stromatolites_in_Sharkbay.jpg/220px-Stromatolites_in_Sharkbay.jpg" decoding="async" width="220" height="164" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Stromatolites_in_Sharkbay.jpg/330px-Stromatolites_in_Sharkbay.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Stromatolites_in_Sharkbay.jpg/440px-Stromatolites_in_Sharkbay.jpg 2x" data-file-width="2440" data-file-height="1816" /></a><figcaption><a href="/wiki/Stromatolitt" title="Stromatolitt">Stromatolittar</a> i Australia. <div style="font-size:85%">Foto: Paul Harrison</div> </figcaption></figure> <p>Fossil av cyanobakterielle matter (<a href="/wiki/Stromatolitt" title="Stromatolitt">stromatolittar</a>) er funne gjennom heile arkeikum, men vert særleg vanleg seint i eonet, medan det ein meiner er fossil av <a href="/wiki/Bakterie" class="mw-redirect" title="Bakterie">bakteriar</a> er funne i <a href="/wiki/Chert" title="Chert">chertlag</a>.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> I tillegg til bakteriar har ein òg funne mikrofossilar av <a href="/wiki/Ekstremofilar" title="Ekstremofilar">ekstremofilar</a> i arkeikum. </p><p>Det fanst truleg liv gjennom heile arkeikum, men var truleg avgrensa til enkle eincella organismar kalla <a href="/w/index.php?title=Prokaryota&action=edit&redlink=1" class="new" title="Prokaryota (sida finst ikkje)">prokaryota</a> (tidlegare kalla monera). Det er ingen kjende fossil av <a href="/wiki/Eukaryotar" title="Eukaryotar">eukaryotar</a>, men dei kan ha utvikla seg gjennom arkeikum utan å ha etterlate fossil.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Ein har enno ikkje funne spor etter ultramikroskopiske intracellulær replikatorar som <a href="/wiki/Virus" title="Virus">virus</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Kjelder">Kjelder</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=5" title="Endre bolk: Kjelder" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=5" title="Rediger kildekoden til seksjonen Kjelder"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small"> <ul><li><i>Denne artikkelen bygger på «<a href="https://en.wikipedia.org/wiki/Archean" class="extiw" title="en:Archean">Archean</a>» frå <a href="https://en.wikipedia.org/wiki/Main_Page" class="extiw" title="en:Main Page">Wikipedia på engelsk</a>, den 17. august 2008.</i> <ul><li><i><a href="https://en.wikipedia.org/wiki/Main_Page" class="extiw" title="en:Main Page">Wikipedia på engelsk</a> oppgav desse kjeldene:</i></li></ul></li></ul> </div> <style data-mw-deduplicate="TemplateStyles:r3318915">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.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">Stanley, Steven M. <i>Earth System History.</i> New York: W.H. Freeman and Company, 1999. <a href="/wiki/Spesial:Bokkjelder/0716728826" class="internal mw-magiclink-isbn">ISBN 0-7167-2882-6</a> s. 297-301</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">Stanley, s. 297-301</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Stanley, pp. 301-2</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">John D. Cooper, Richard H. Miller, and Jacqueline Patterson, <i>A Trip Through Time: Principles of Historical Geology</i>, (Columbus: Merrill Publishing Company, 1986), s. 180.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.toyen.uio.no/geomus/leksi/a/arkeikum.htm">Arkeikum</a> på GeoLeksi</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text">Stanley, 307</span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text">Stanley, s. 306, 323</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bakgrunnsstoff">Bakgrunnsstoff</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arkeikum&veaction=edit&section=6" title="Endre bolk: Bakgrunnsstoff" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Arkeikum&action=edit&section=6" title="Rediger kildekoden til seksjonen Bakgrunnsstoff"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.stratigraphy.org/geowhen/stages/Archean.html">GeoWhen database</a></li> <li><a rel="nofollow" class="external text" href="http://www.utdallas.edu/~rjstern/PlateTectonicsStart/">Kor tid startar platetektonikken?</a></li> <li><a rel="nofollow" class="external text" href="http://www.palaeos.com/Archean/Archean.htm">Arkeikum</a> - <i>Paleos</i></li></ul> <table class="toccolours" style="margin-left:auto; margin-right:auto;text-align:center;"> <tbody><tr> <th style="background:rgb(226,0,122);" colspan="3"><a href="/wiki/Prekambrium" title="Prekambrium">Prekambrium</a> </th> <th style="background:rgb(154,217,221);width:100px;" rowspan="2"><a href="/wiki/Fanerozoikum" title="Fanerozoikum">Fanerozoikum</a> </th> <th>  </th></tr> <tr> <th style="background:rgb(221,47,135);width:100px;"><a href="/wiki/Hadeikum" title="Hadeikum">Hadeikum </a> </th> <th style="background:rgb(226,0,122);width:100px;"><a class="mw-selflink selflink">Arkeikum</a> </th> <th style="background:rgb(232,82,113);width:100px;"><a href="/wiki/Proterozoikum" title="Proterozoikum">Proterozoikum</a> </th></tr></tbody></table> <table class="toccolours" style="margin-left:auto; margin-right:auto; width:36em; text-align:center"> <tbody><tr> <th style="background:rgb(226,0,122);" colspan="4"><a class="mw-selflink selflink">Arkeikum</a> </th></tr> <tr> <th style="background:rgb(221,47,135); width:8em;"><a href="/wiki/Eoarkeikum" title="Eoarkeikum">Eoarkeikum</a> </th> <th style="background:rgb(233,96,155); width:8em;"><a href="/wiki/Paleoarkeikum" title="Paleoarkeikum">Paleoarkeikum</a> </th> <th 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