A Tale of Two Submerged Continents

<!doctype html> <html lang="en" class="story-desktop ui-ie7 ui-ie"> <head prefix="og: https://ogp.me/ns# fb: https://ogp.me/ns/fb#"> <meta charset="utf-8"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <link rel="dns-prefetch" href="https://cdn.britannica.com/mendel-resources/3-130"> <link rel="preconnect" href="https://cdn.britannica.com/mendel-resources/3-130"> <link rel="preload" as="script" href="https://www.googletagservices.com/tag/js/gpt.js" /> <link rel="icon" href="/favicon.png" /> <meta name="description" content="In February 2017 studies of Earth鈥檚 geological and geophysical features revealed evidence of ancient continents in the Indian and Pacific Oceans." /> <meta name="keywords" content="spotlight, Mauritia, Zealandia, paleocontinent, Mauritius, continent, Earth, continental crust, zircon, gravity, geophysics, Pangea, Gondwana" /> <link rel="canonical" href="https://www.britannica.com/story/a-tale-of-two-submerged-continents" /> <title>A Tale of Two Submerged Continents | Britannica</title> <script type="text/javascript" data-type="Init Mendel"> window.$UI = {}; window.Constants = {"LICENSE_URL": "/bps/license","DEFAULT_TEST_VERSION": "A","DEFAULT_STATE": "XX","QUIZ_URL": "/quiz","SPOTLIGHT_BROWSE_URL": "/stories/spotlight","CONTENT_TYPE_TEXT": "text/plain;charset=UTF-8","TOPIC_FACTS_DATA_URL": "/facts","QUIZ_BROWSE_IMAGE_QUIZZES": "images","TOPIC_MEDIA_PATH": "/images-videos","USER_PROFILE_URL": "/user","DEBUG_URL": "/debug","ONE_GOOD_FACT_URL": "/one-good-fact","ERROR_404_URL": "/error404","PROCON_CITED_IN_THE_NEWS_URL": "/procon/ProCon-in-the-News","PROCON_URL": "/procon","TOPIC_PAGE_CONTENT_AJAX_URL": "/topic-content/page","INFINITE_SCROLL_PREFIX_URL": "/scroll","TOPIC_TOP_QUESTION_BROWSE_URL": "/questions","CC_USD": "USD","domain": "britannica.com","SURVEY_URL": "/survey","CATEGORY_BROWSE_URL": "/browse","STORY_BROWSE_URL": "/stories","COUNTRY_US": "US","OPEN_MEDIA_OVERLAY_PARAMETER": "/media","NEWSLETTER_SUBSCRIPTION_URL": "/newsletter-subscription","MAINTENANCE_ERROR_URL": "https://maintenance.eb.com","IMARS_EDITOR_ID": "12365882","PROFILE_EB_EDITOR_URL": "/editor","WEB_INF_RESOURCES_PATH": "WEB-INF/resources","AI_ABOUT_PAGE_URL": "/about-britannica-ai","TOPIC_ADDITIONAL_INFO_PATH": "/additional-info","SUDOKU_GAME_URL": "/games/sudoku","CC_INR": "INR","ARTICLE_PRINT_URL": "/print/article","FIRST_EDITION_URL": "/subscriber/firstedition","WW1_PORTAL_URL": "/discover/World-War-I","MENDEL_COOKIE": "__mendel","DEMYSTIFIED_BROWSE_URL": "/stories/demystified","LIST_BROWSE_URL": "/list/browse","PROFILE_EXPERT_URL": "/contributor","ASSEMBLY_IMAGE_URL": "/image/assembly","DAY_IN_HISTORY_URL": "/on-this-day","DEFAULT_CURRENCY": "USD","CONTENT_TYPE_XML": "text/xml;charset=UTF-8","PORTAL_FINANCE_BROWSE_URL_PREFIX": "/money/browse","MONEY_IMARS_CATEGORY": "13000","AJAX_PREFIX_URL": "/ajax","TOPIC_BROWSE_URL": "/topic-browse","MARKETING_CONTENT": "/marketing-content","ENV_RUNTIME": "runtime","GALLERY_URL": "/gallery","topicUrlClassesList": "topic|animal|art|biography|event|place|plant|science|sports|technology|procon","CONTENT_TYPE_HTML": "text/html;charset=UTF-8","ENV_LOCAL": "override","MEDIA_OVERLAY_URL": "/media-overlay","CHATBOT_PAGE_URL": "/chatbot","NEWSLETTER_PAGE_URL": "/newsletters","ENV_DEV": "development","MEDIA_URL": "/media","TOPIC_TOP_QUESTION_URL": "/question","PORTAL_FINANCE_URL_PREFIX": "/money","PODCASTS_URL": "/podcasts","STAND_ALONE_VIDEO_URL": "/video","MORE_ON_THIS_DAY_URL": "/more-on-this-day","TOPIC_QUOTES_URL": "/quotes","SEARCH_PAGE_URL": "/search","PROCON_CLASS": "PROCON","KUSTOM_MENDEL_APPLICATION_ID": "1","TOPIC_CONTENT_AJAX_URL": "/topic-content/topic","ENV_BRANCH": "branch","ERROR_URL": "/error","MAIN_VERSION": "mainVersion","DEFAULT_S3_REGION": "US_EAST_1","TOPIC_COLLECTION_URL": "/summary","LOGINBOX_URL": "/auth/loginbox","ONE_GOOD_FACT_BROWSE_URL": "/one-good-fact/all-good-facts","QUIZ_BROWSE_URL": "/quiz/browse","BIO_BROWSE_URL": "/browse/biographies","LIST_URL": "/list","TIGHTROPE_QUIZ_URL": "/quiz/tightrope","ALPHA_BROWSE_URL": "/sitemap","CONTENT_TYPE_JSON": "application/json","DICTIONARY_URL": "/dictionary","COBRAND_IMAGE_URL": "/image/cobrand","PROCON_IN_THE_NEWS_URL": "/procon/pro-and-con-issues-in-the-news","PROCON_BROWSE_URL": "/procon","QUIZ_BROWSE_VOCAB_QUIZZES": "vocabulary-quizzes","SUBMISSION_URL": "/submission","EB_LOG_OUT": "/auth2/logout","ENV_PRODUCTION": "production","EXPLORE_PORTAL_URL": "/explore","TOPIC_AJAX_URL": "/ajax/topic","TOPIC_SUMMARY_BROWSE_URL": "/summaries","WTFACT_BROWSE_URL": "/stories/wtfact","VIDEO_CHANNEL_URL": "/videos","GALLERY_BROWSE_URL": "/gallery/browse","CACHE_URL": "/cache","PROCON_ABOUT_URL": "/procon/About-ProCon","COMPANION_BROWSE_URL": "/stories/companion","MEDIA_FOLDER": "/eb-media","SHOW_ALL_CONTRIBUTORS": "/additional-info#contributors","BRITANNICA_EDITORS_ID": "4419","ENV_CACHE_DISABLED": "mendelCache","CALCULATORS_BROWSE_URL": "/calculators","STORY_URL": "/story","DEFAULT_COUNTRY": "US","NAVBAR_URL": "/ajax/navbar","EB_LOGIN_URL": "/auth/eb-login","NEW_ARTICLES_URL": "/new-articles",}; window.CDN = "https://cdn.britannica.com"; window.CAM_LOGIN_URL = "https://cam.britannica.com"; window.CAM_SIGN_UP_URL = "https://cam.britannica.com/registration" window.Mendel = { "config" : { "domain": "britannica.com", "page": "Story", "videoPlayerId": "UyMCoK2v", "sharedUrl": "https://www.britannica.com/story/a-tale-of-two-submerged-continents", "amuselabsUrl": "https://cdn3.amuselabs.com", "resourcesPrefixUrl": "https://cdn.britannica.com/mendel-resources/3-130/[url]?v=3.130.14", "date": 20241125, "userInfo": { "type": "ANONYMOUS" ,"currency": "AUUS" ,"country": "SG" ,"state": "XX" ,"timezone": "Asia/Singapore" ,"bcomId": "5004818054585366606" ,"hasAds": true ,"testVersion": "A" ,"adsTestVersion": "A" ,"consumerId": "" ,"instId": "" ,"consumerUserName": "" ,"instUserName": "" ,"cognito": null }, "tvs":{ "r":[25,25,25,25], "a": [25,25,25,25]}, "isLoggedInAsUser": false, "isPhone": false, "isDesktop": true, "logoutUrl": "/auth2/logout", "selfServiceUrl": "https://myaccount.britannica.com", "cdnUrl": "https://cdn.britannica.com", "chatbotApi": "https://www.britannica.com/chat-api", "fetchOffset": 800, "mendelCookieName": "__mendel", "mendelCookie": {"surveyShown":false,"visitedTopicId":0,"currentDate":20241125}, "autocompleteToSearchPage": false,"pagesInfo": [{"url":"a-tale-of-two-submerged-continents","title":"A Tale of Two Submerged Continents"},{"url":"7-banned-books-through-time","title":"11 Banned Books Through Time"},{"url":"why-is-it-called-black-friday","title":"Why Is It Called Black Friday?"},{"url":"why-is-thanksgiving-in-the-us-celebrated-on-a-thursday","title":"Why Is Thanksgiving in the U.S. Celebrated on a Thursday?"},{"url":"why-do-we-eat-turkey-on-thanksgiving","title":"Why Do We Eat Turkey on Thanksgiving?"},{"url":"why-is-the-mona-lisa-so-famous","title":"Why Is the <em>Mona Lisa</em> So Famous?"},{"url":"why-is-ireland-two-countries","title":"Why Is Ireland Two Countries?"},{"url":"pro-and-con-gun-control","title":"Pro and Con: Gun Control"},{"url":"the-rise-of-the-machines-pros-and-cons-of-the-industrial-revolution","title":"The Rise of the Machines: Pros and Cons of the Industrial Revolution"},{"url":"was-santa-claus-a-real-person","title":"Was Santa Claus a Real Person?"},{"url":"causes-of-the-great-depression","title":"Causes of the Great Depression"}] ,"currentFeature": 6187 ,"storyType": "SPOTLIGHT" }, "GA": {"leg":"A","adLeg":"A","userType":"ANONYMOUS","pageType":"Story","pageSubtype":"SPOTLIGHT","gisted":false,"pageNumber":1,"hasSummarizeButton":false,"hasAskButton":false} }; </script> <meta property="fb:app_id" content="1887621861548296"/ <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:site" content="@britannica" /> <meta name="twitter:image" content="https://cdn.britannica.com/66/194766-131-05DBB9E1/canyon-swell-reef-sunlight-water-surface-Pacific.jpg" /> <meta name="twitter:description" content="In February 2017 studies of Earth鈥檚 geological and geophysical features revealed evidence of ancient continents in the Indian and Pacific Oceans."/> <meta property="og:type" content="ARTICLE"/> <meta property="og:title" content="A Tale of Two Submerged Continents | Britannica"/> <meta property="og:description" content="In February 2017 studies of Earth鈥檚 geological and geophysical features revealed evidence of ancient continents in the Indian and Pacific Oceans."/> <meta property="og:site_name" content="Encyclopedia Britannica" /> <meta property="og:url" content="https://www.britannica.com/story/a-tale-of-two-submerged-continents"/> <meta property="og:image" content="https://cdn.britannica.com/66/194766-131-05DBB9E1/canyon-swell-reef-sunlight-water-surface-Pacific.jpg" /> <meta property="og:image:type" content="image/jpeg" /> <script type="text/javascript" data-type="init opengraph"> Mendel.openGraph = {"type":"ARTICLE","title":"A Tale of Two Submerged Continents","description":"In February 2017 studies of Earth鈥檚 geological and geophysical features revealed evidence of ancient continents in the Indian and Pacific Oceans.","imageUrl":"https://cdn.britannica.com/66/194766-131-05DBB9E1/canyon-swell-reef-sunlight-water-surface-Pacific.jpg","imageType":"image/jpeg","pageUrl":"https://www.britannica.com/story/a-tale-of-two-submerged-continents"}</script> <link rel="preconnect" href="https://fonts.googleapis.com/"> <link rel="dns-prefetch" href="https://fonts.googleapis.com/" > <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons"> <link href="https://cdn.britannica.com/mendel-resources/3-130/dist/vendor-bundle.css?v=3.130.14" rel="stylesheet" /> <link href="https://cdn.britannica.com/mendel-resources/3-130/dist/mendel-css.css?v=3.130.14" rel="stylesheet" /> <link href="https://cdn.britannica.com/mendel-resources/3-130/dist/story-page.css?v=3.130.14" rel="stylesheet" /> <script type="text/javascript"> if (self !== top) { top.location = self.location; } // if ('scrollRestoration' in history) { history.scrollRestoration = 'manual'; } </script> <script src="https://cdn.britannica.com/mendel-resources/3-130/js/at.js?v=3.130.14" async ></script> <script> dataLayer = []; </script> <script type="text/javascript">(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-5W6NC8'); </script> </head> <body data-leg="A" class="popular-topics-story user-ANONYMOUS user-ads md-desktop leg-ab-ie">  <script>Mendel.config.adProvider='ay';</script> <script async src="https://securepubads.g.doubleclick.net/tag/js/gpt.js"></script> <script> window.googletag = window.googletag || {cmd: []}; googletag.cmd.push(function() { googletag.defineSlot('/15510053/CMP_1x1', [1, 1], 'div-gpt-ad-1709766812090-0').addService(googletag.pubads()); googletag.pubads().enableSingleRequest(); googletag.enableServices(); }); </script> <script async defer src="https://launchpad-wrapper.privacymanager.io/0ccc6fe8-1870-4ad8-b47b-6d029ac116fc/launchpad-liveramp.js"></script> <script async src="https://JRyhoywLYXNLYMAhs.ay.delivery/manager/JRyhoywLYXNLYMAhs" type="text/javascript" referrerpolicy="no-referrer-when-downgrade" ></script><div class="ie-warning d-flex align-items-center align-self-center justify-content-center site-alert bg-orange"> <div> You are using an <strong>outdated</strong> browser. Please <a class="text-white text-underscore" href="https://browsehappy.com/">upgrade your browser</a> to improve your experience and security. </div> </div> <script id="json-navbar-info" type="application/json"> {"topSectionLinks":[{"title":"Ask the Chatbot","url":"/chatbot","navbarId":"CHATBOT"},{"title":"Games & Quizzes","url":"/quiz/browse","navbarId":"QUIZZES"},{"title":"ProCon","url":"/procon","navbarId":"PROCON"},{"title":"History & Society","url":"/History-Society","navbarId":"HISTORY"},{"title":"Science & Tech","url":"/Science-Tech","selected":true,"navbarId":"SCIENCE"},{"title":"Biographies","url":"/Biographies","navbarId":"BIOS"},{"title":"Animals & Nature","url":"/Animals-Nature","navbarId":"ANIMALS"},{"title":"Geography & Travel","url":"/Geography-Travel","navbarId":"GEOGRAPHY"},{"title":"Arts & Culture","url":"/Arts-Culture","navbarId":"ART"},{"title":"Money","url":"/money","navbarId":"MONEY"},{"title":"Videos","url":"/videos","navbarId":"VIDEOS"}],"selectedSuperCategory":{"id":6,"title":"Science & Tech","url":"Science-Tech","description":"Explore science and technology; astronomy; biology; chemistry; earth science; mathematics; physics; technology, agriculture, cars, computers, engineering, industry, inventions, communication","keywords":"astronomy; biology; chemistry; earth science; mathematics; physics; technology, agriculture, cars, computers, engineering, industry, inventions, communication","classId":"SCIENCE","sortOrder":2},"selectedNavbarLink":{"title":"Science & Tech","url":"/Science-Tech","selected":true,"navbarId":"SCIENCE"}} </script> <script id="json-hamburger-menu" type="application/json"> {"britannicaMenu1":[{"title":"Home","url":"/"},{"title":"ProCon","url":"/procon"},{"title":"History & Society","url":"/History-Society"},{"title":"Science & Tech","url":"/Science-Tech"},{"title":"Biographies","url":"/Biographies"},{"title":"Animals & Nature","url":"/Animals-Nature"},{"title":"Geography & Travel","url":"/Geography-Travel"},{"title":"Arts & Culture","url":"/Arts-Culture"},{"title":"Money","url":"/money"}],"britannicaMenu2":[{"title":"Games & Quizzes","url":"/quiz/browse"},{"title":"Videos","url":"/videos"},{"title":"On This Day","url":"/on-this-day"},{"title":"One Good Fact","url":"/one-good-fact"},{"title":"Dictionary","url":"/dictionary"},{"title":"New Articles","url":"/new-articles"}],"browseByCategory":[{"title":{"id":5,"title":"History & Society","url":"/History-Society"},"links":[{"title":"Lifestyles & Social Issues","url":"/browse/Lifestyles-Social-Issues"},{"title":"Philosophy & Religion","url":"/browse/Philosophy-Religion"},{"title":"Politics, Law & Government","url":"/browse/Politics-Law-Government"},{"title":"World History","url":"/browse/World-History"}]},{"title":{"id":6,"title":"Science & Tech","url":"/Science-Tech"},"links":[{"title":"Health & Medicine","url":"/browse/Health-Medicine"},{"title":"Science","url":"/browse/Science"},{"title":"Technology","url":"/browse/Technology"}]},{"title":{"id":3,"title":"Biographies","url":"/Biographies"},"links":[{"title":"Browse Biographies","url":"/browse/biographies"}]},{"title":{"id":1,"title":"Animals & Nature","url":"/Animals-Nature"},"links":[{"title":"Birds, Reptiles & Other Vertebrates","url":"/browse/Birds-Reptiles-Vertebrates"},{"title":"Bugs, Mollusks & Other Invertebrates","url":"/browse/Bugs-Mollusks-Invertebrates"},{"title":"Environment","url":"/browse/Environment"},{"title":"Fossils & Geologic Time","url":"/browse/Fossil-Geologic-Time"},{"title":"Mammals","url":"/browse/Mammals"},{"title":"Plants","url":"/browse/Plants"}]},{"title":{"id":4,"title":"Geography & Travel","url":"/Geography-Travel"},"links":[{"title":"Geography & Travel","url":"/browse/Geography-Travel"}]},{"title":{"id":2,"title":"Arts & Culture","url":"/Arts-Culture"},"links":[{"title":"Entertainment & Pop Culture","url":"/browse/Entertainment-Pop-Culture"},{"title":"Literature","url":"/browse/Literature"},{"title":"Sports & Recreation","url":"/browse/Sports-Recreation"},{"title":"Visual Arts","url":"/browse/Visual-Arts"}]}],"browseByFeature":[{"title":"Companions","url":"/stories/companion"},{"title":"Demystified","url":"/stories/demystified"},{"title":"Image Galleries","url":"/gallery/browse"},{"title":"Lists","url":"/list/browse"},{"title":"Podcasts","url":"/podcasts"},{"title":"Spotlight","url":"/stories/spotlight"},{"title":"Summaries","url":"/summary"},{"title":"The Forum","url":"/stories/the-forum"},{"title":"Top Questions","url":"/question"},{"title":"#WTFact","url":"/stories/wtfact"}],"moreFromBritannica":[{"title":"Britannica Kids","url":"https://kids.britannica.com/","newTab":true}],"menuType":"DEFAULT"} </script> <header id="header" class="bg-navy-dark"> <div class="global-nav-top-bar"> <div class="grid gx-0 h-100 justify-content-between align-items-center container-lg mx-auto p-0 position-relative"> <div class="d-flex align-items-center"> <button class="d-flex align-items-center justify-self-start js-toggle js-toggle-hamburger btn btn-link link-white btn-sm rounded-0 p-10"> <div class="hamburger-tooltip"> <em class="material-icons d-inline-block font-24" id="nav-toggle" data-icon="menu"></em> </div> <em class="material-icons d-inline-block font-24 global-nav-search-icon" id="nav-search-icon" data-icon="search" ></em> </button> <a href="/" class="d-flex align-items-center justify-content-center ml-10"> <img loading="lazy" src="https://cdn.britannica.com/mendel/eb-logo/MendelNewThistleLogo.png" alt="Encyclopedia Britannica" class="global-nav-logo global-nav-logo-left" /> </a> <div class="global-nav-top-search-bar global-nav-top-search-container global-nav-search-container" id="global-nav-top-search-bar"> <form method="get" action="/search" id="global-nav-search" class="md-search-form m-0 global-nav-search-bar-small"> <div class="search-box position-relative col-100"> <label class="sr-only" for="global-nav-search-query">Search Britannica</label> <input name="query" id="global-nav-search-query" placeholder="Search Britannica..." class="form-control form-control-lg rounded-lg font-16 search-query pl-20 pr-70 shadow-sm" maxlength="200" autocomplete="off" aria-label="Search Britannica" /> <button class="search-reset-btn btn btn-link px-10 position-absolute top-0 h-100 d-none" type="reset"> <em class="material-icons" data-icon="close"></em> </button> <button class="search-submit btn btn-link text-blue px-10 position-absolute top-0 right-0 h-100" type="submit" disabled> <span class="sr-only">Click here to search</span> <em class="material-icons search-icon" data-icon="search"></em> </button> </div> </form> </div> </div> <a href="/" class="d-flex align-items-center justify-content-center"> <img loading="lazy" src="https://cdn.britannica.com/mendel/eb-logo/MendelNewThistleLogo.png" alt="Encyclopedia Britannica" class="global-nav-center global-nav-logo non-homepage-logo" /> </a> <form method="get" action="/search" id="global-nav-search" class="md-search-form m-0 global-nav-search-bar-small global-nav-center search global-nav-center-search-container"> <div class="search-box position-relative col-100"> <label class="sr-only" for="global-nav-search-query">Search Britannica</label> <input name="query" id="global-nav-search-query" placeholder="Search Britannica..." class="form-control form-control-lg rounded-lg font-16 search-query pl-20 pr-70 shadow-sm" maxlength="200" autocomplete="off" aria-label="Search Britannica" /> <button class="search-reset-btn btn btn-link px-10 position-absolute top-0 h-100 d-none" type="reset"> <em class="material-icons" data-icon="close"></em> </button> <button class="search-submit btn btn-link text-blue px-10 position-absolute top-0 right-0 h-100" type="submit" disabled> <span class="sr-only">Click here to search</span> <em class="material-icons search-icon" data-icon="search"></em> </button> </div> </form> <div class="col-35 col-sm-auto text-right order-3 mr-lg-15 align-items-center d-flex justify-content-end"> <div class="d-none d-md-inline-block"> <SPAN class="marketing-HEADER_SUBSCRIPTION_DESKTOP2 marketing-content" data-marketing-id="HEADER_SUBSCRIPTION_DESKTOP2"><a href="https://subscription.britannica.com/subscribe?partnerCode=BP_Black_Friday_AUUS" class="subscribe-link btn btn-sm btn-outline-white-orange py-5 mr-10" target="_blank" rel="noopener"> Subscribe </a></SPAN></div> <div class="d-inline-block d-md-none mr-5 mr-sm-10"> <SPAN class="marketing-HEADER_SUBSCRIPTION_MOBILE marketing-content" data-marketing-id="HEADER_SUBSCRIPTION_MOBILE"><a href="https://subscription.britannica.com/subscribe?partnerCode=BP_Black_Friday_AUUS" class="subscribe-link btn btn-xs btn-orange-dark p-5" target="_blank" rel="noopener"> Subscribe </a></SPAN></div> <button class="js-toggle-user-dropdown js-toggle btn btn-sm btn-link link-white rounded-0 px-md-15 pl-5 pr-5"> <span class="d-none d-md-inline-block mr-5">Login</span> <em class="material-icons d-inline-block d-md-none font-16 font-sm-20" data-icon="account_circle"></em> <div class="d-none dropdown-menu-subscription-link">https://subscription.britannica.com/subscribe?partnerCode=BP_Black_Friday_AUUS</div> <em class="material-icons inactive-icon d-inline-block font-18" data-icon="keyboard_arrow_down"></em> <em class="material-icons active-icon d-inline-block font-18" data-icon="keyboard_arrow_up"></em> </button> </div> </div> </div> <div class="d-none hamburger-menu-subscription-link"><DIV class="marketing-HAMBURGER_MENU_CTA marketing-content" data-marketing-id="HAMBURGER_MENU_CTA"><a href="https://premium.britannica.com/premium-membership/?utm_source=premium&utm_medium=hamburger-menu&utm_campaign=black-friday-2024" class="subscribe-link btn btn-sm btn-orange py-5" target="_blank"> Subscribe <span class="d-none d-md-inline"> Now</span> </a></DIV></div> <div id="global-nav-react"> <div class="d-none"> <ul> <li><a href="/">Home</a></li> <li><a href="/procon">ProCon</a></li> <li><a href="/History-Society">History & Society</a></li> <li><a href="/Science-Tech">Science & Tech</a></li> <li><a href="/Biographies">Biographies</a></li> <li><a href="/Animals-Nature">Animals & Nature</a></li> <li><a href="/Geography-Travel">Geography & Travel</a></li> <li><a href="/Arts-Culture">Arts & Culture</a></li> <li><a href="/money">Money</a></li> </ul> <ul> <li><a href="/quiz/browse">Games & Quizzes</a></li> <li><a href="/videos">Videos</a></li> <li><a href="/on-this-day">On This Day</a></li> <li><a href="/one-good-fact">One Good Fact</a></li> <li><a href="/dictionary">Dictionary</a></li> <li><a href="/new-articles">New Articles</a></li> </ul> <a href="/History-Society">History & Society</a> <ul> <li><a href="/browse/Lifestyles-Social-Issues">Lifestyles & Social Issues</a></li> <li><a href="/browse/Philosophy-Religion">Philosophy & Religion</a></li> <li><a href="/browse/Politics-Law-Government">Politics, Law & Government</a></li> <li><a href="/browse/World-History">World History</a></li> </ul> <a href="/Science-Tech">Science & Tech</a> <ul> <li><a href="/browse/Health-Medicine">Health & Medicine</a></li> <li><a href="/browse/Science">Science</a></li> <li><a href="/browse/Technology">Technology</a></li> </ul> <a href="/Biographies">Biographies</a> <ul> <li><a href="/browse/biographies">Browse Biographies</a></li> </ul> <a href="/Animals-Nature">Animals & Nature</a> <ul> <li><a href="/browse/Birds-Reptiles-Vertebrates">Birds, Reptiles & Other Vertebrates</a></li> <li><a href="/browse/Bugs-Mollusks-Invertebrates">Bugs, Mollusks & Other Invertebrates</a></li> <li><a href="/browse/Environment">Environment</a></li> <li><a href="/browse/Fossil-Geologic-Time">Fossils & Geologic Time</a></li> <li><a href="/browse/Mammals">Mammals</a></li> <li><a href="/browse/Plants">Plants</a></li> </ul> <a href="/Geography-Travel">Geography & Travel</a> <ul> <li><a href="/browse/Geography-Travel">Geography & Travel</a></li> </ul> <a href="/Arts-Culture">Arts & Culture</a> <ul> <li><a href="/browse/Entertainment-Pop-Culture">Entertainment & Pop Culture</a></li> <li><a href="/browse/Literature">Literature</a></li> <li><a href="/browse/Sports-Recreation">Sports & Recreation</a></li> <li><a href="/browse/Visual-Arts">Visual Arts</a></li> </ul> <ul> <li><a href="/stories/companion">Companions</a></li> <li><a href="/stories/demystified">Demystified</a></li> <li><a href="/gallery/browse">Image Galleries</a></li> <li><a href="/list/browse">Lists</a></li> <li><a href="/podcasts">Podcasts</a></li> <li><a href="/stories/spotlight">Spotlight</a></li> <li><a href="/summary">Summaries</a></li> <li><a href="/stories/the-forum">The Forum</a></li> <li><a href="/question">Top Questions</a></li> <li><a href="/stories/wtfact">#WTFact</a></li> </ul> <ul> <li><a href="https://kids.britannica.com/">Britannica Kids</a></li> </ul> </div> </div> </header> <div class="bg-navy-dark"> <div class="container-lg p-0 d-flex justify-content-center global-nav-categories-bar overflow-hidden"> <div class="slider js-slider position-relative d-inline-flex align-items-center mw-100 global-nav-slider category-snap-slider"> <div class="slider-container js-slider-container overflow-hidden d-flex font-14 overflow-hidden text-nowrap mx-5"> <a class="nav-bar-category mx-5 category-link-CHATBOT " href="/chatbot">Ask the Chatbot</a> <a class="nav-bar-category mx-5 category-link-QUIZZES " href="/quiz/browse">Games & Quizzes</a> <a class="nav-bar-category mx-5 category-link-PROCON " href="/procon">ProCon</a> <a class="nav-bar-category mx-5 category-link-HISTORY " href="/History-Society">History & Society</a> <a class="nav-bar-category mx-5 category-link-SCIENCE selected selected" href="/Science-Tech">Science & Tech</a> <a class="nav-bar-category mx-5 category-link-BIOS " href="/Biographies">Biographies</a> <a class="nav-bar-category mx-5 category-link-ANIMALS " href="/Animals-Nature">Animals & Nature</a> <a class="nav-bar-category mx-5 category-link-GEOGRAPHY " href="/Geography-Travel">Geography & Travel</a> <a class="nav-bar-category mx-5 category-link-ART " href="/Arts-Culture">Arts & Culture</a> <a class="nav-bar-category mx-5 category-link-MONEY " href="/money">Money</a> <a class="nav-bar-category mx-5 category-link-VIDEOS " href="/videos">Videos</a> </div> <button disabled class="prev-button js-prev-button position-absolute btn btn-circle shadow btn-blue " aria-label="Previous"> <span class="material-icons md-24" data-icon="keyboard_arrow_left"></span> </button> <button disabled class="next-button js-next-button position-absolute btn btn-circle shadow btn-blue " aria-label="Next"> <span class="material-icons md-24" data-icon="keyboard_arrow_right"></span> </button> </div> </div> </div> <main> <div class="md-page-wrapper"> <div id="content" class="md-content"> <script type="application/ld+json"> {"headline":"A Tale of Two Submerged Continents","image":{"url":"https://cdn.britannica.com/66/194766-131-05DBB9E1/canyon-swell-reef-sunlight-water-surface-Pacific.jpg","@type":"ImageObject"},"author":[{"name":"John P. Rafferty","url":"https://www.britannica.com/editor/John-P-Rafferty/6747","@type":"Person"}],"keywords":"A Tale of Two Submerged Continents","url":"https://www.britannica.com/story/a-tale-of-two-submerged-continents","description":"In February 2017 studies of Earth鈥檚 geological and geophysical features revealed evidence of ancient continents in the Indian and Pacific Oceans.","publisher":{"logo":{"url":"https://corporate.britannica.com/wp-content/themes/eb-corporate/_img/logo.png","@type":"ImageObject"},"name":"Encyclopedia Britannica","@type":"Organization"},"@context":"https://schema.org","@type":"article"} </script> <main id="story-container" class="SPOTLIGHT"> <div class="story-content"> <div class="story-content story-container qa-content" data-bc-category="Science" data-feature-id="6187"> <div class="md-article-container"> <div class="feature-container container-lg p-0 pb-40 p-md-20"> <aside class="d-none d-lg-block feature-left-rail p-20 pb-60 clear-catfish-ad"> <div class="feature-section"> <div class="label mb-15 font-serif">Discover</div> <div class="mobile-carousel-items"> <ul class="pl-0 lr-image-list font-14 m-0 mb-30 d-flex flex-md-column slider-container js-slider-container overflow-hidden discover"> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/quiz/quick-quiz-this-land-is-your-land" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/95/168695-131-11055CC5/Geography-Something-globe-Europe-Eurasia-Africa.jpg?w=68&h=68&s=crop" alt="7:023 Geography: Think of Something Big, globe showing Africa, Europe, and Eurasia" /> </a> <div class="link-container"> <a class="" href="/quiz/quick-quiz-this-land-is-your-land">Quick Quiz: This Land Is Your Land</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/quiz/international-waters" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/00/168200-131-0AE52F37/Aquanauts-divers-Underwater-Treasure-treasure-underwater.jpg?w=68&h=68&s=crop" alt="1:116 Aquanauts: Underwater Treasure, divers searching for treasure underwater" /> </a> <div class="link-container"> <a class="" href="/quiz/international-waters">International Waters</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/quiz/world-geography-fact-or-fiction" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/10/141210-131-9B237977/Perito-Moreno-glacier-Patagonia-Argentina.jpg?w=68&h=68&s=crop" alt="Perito Moreno glacier, Patagonia, Argentina." /> </a> <div class="link-container"> <a class="" href="/quiz/world-geography-fact-or-fiction">World Geography: Fact or Fiction?</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/where-does-the-name-europe-come-from" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/24/199024-131-FFEE0BC4/Map-view-globe-Europe.jpg?w=68&h=68&s=crop" alt="Map view of Europe on a geographical globe." /> </a> <div class="link-container"> <a class="" href="/story/where-does-the-name-europe-come-from">Where Does the Name <em>Europe</em> Come From?</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/spotting-a-supercontinent-how-pangea-was-discovered" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/46/136146-131-1D431D5C/Distribution-landmasses-regions-seas-ocean-basins-locations.jpg?w=68&h=68&s=crop" alt="Paleogeography and paleoceanography of Early Triassic time. The present-day coastlines and tectonic boundaries of the configured continents are shown at the lower right. Continents, continental drift, plate tectonics, Pangea, Laurussia, Gondwana." /> </a> <div class="link-container"> <a class="" href="/story/spotting-a-supercontinent-how-pangea-was-discovered">Spotting a Supercontinent: How Pangea Was Discovered</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/quiz/water-and-its-varying-forms" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/02/157502-131-7C5D3A67/water-glass-background.jpg?w=68&h=68&s=crop" alt="water glass on white background. (drink; clear; clean water; liquid)" /> </a> <div class="link-container"> <a class="" href="/quiz/water-and-its-varying-forms">Water and its Varying Forms</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/quiz/all-about-oceans-and-seas-quiz" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/48/172748-131-287B3EAC/wave-ocean-sea-waves-hurricane-cyclone-storm.jpg?w=68&h=68&s=crop" alt="wave. ocean. Cresting ocean wave. Large sea waves. storm, hurricane, tropical cyclone" /> </a> <div class="link-container"> <a class="" href="/quiz/all-about-oceans-and-seas-quiz">All About Oceans and Seas Quiz</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/list/americas-5-most-notorious-cold-cases-including-one-you-may-have-thought-was-already-solved" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/71/196471-131-8FEA8DDD/Daily-Police-Bulletin-Elizabeth-Short-Black-Dahlia-January-1947.jpg?w=68&h=68&s=crop" alt="Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that" /> </a> <div class="link-container"> <a class="" href="/list/americas-5-most-notorious-cold-cases-including-one-you-may-have-thought-was-already-solved">America鈥檚 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/pro-and-con-gun-control" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/05/228405-131-07C0139F/pro-con-artwork.jpg?w=68&h=68&s=crop" alt="Artwork for themes for Pro-Con articles." /> </a> <div class="link-container"> <a class="" href="/story/pro-and-con-gun-control">Pro and Con: Gun Control</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/why-is-thanksgiving-in-the-us-celebrated-on-a-thursday" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/06/212906-131-C791368A/Thanksgiving-celebration-food-table-spread.jpg?w=68&h=68&s=crop" alt="Thanksgiving Celebration Traditional Dinner Setting Food Concept" /> </a> <div class="link-container"> <a class="" href="/story/why-is-thanksgiving-in-the-us-celebrated-on-a-thursday">Why Is Thanksgiving in the U.S. Celebrated on a Thursday?</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/was-santa-claus-a-real-person" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/92/202092-131-ACFF5B40/Santa-Claus-sleigh.jpg?w=68&h=68&s=crop" alt="Santa Claus flying in his sleigh, christmas, reindeer" /> </a> <div class="link-container"> <a class="" href="/story/was-santa-claus-a-real-person">Was Santa Claus a Real Person?</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/list/timeline-of-the-american-civil-rights-movement" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/17/177117-131-A08C82B6/African-Americans-front-voting-rights-White-House-1965.jpg?w=68&h=68&s=crop" alt="African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights." /> </a> <div class="link-container"> <a class="" href="/list/timeline-of-the-american-civil-rights-movement">Timeline of the American Civil Rights Movement</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/7-banned-books-through-time" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/34/166534-131-FEA58963/Cheshire-Cat-Lewis-Carroll-Alices-Adventures-in.jpg?w=68&h=68&s=crop" alt="The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)" /> </a> <div class="link-container"> <a class="" href="/story/7-banned-books-through-time">11 Banned Books Through Time</a> </div> <div class="item-separator d-md-none"></div> </li> <li class="mb-10 mr-10 mr-md-0 d-inline-flex"> <a href="/story/the-rise-of-the-machines-pros-and-cons-of-the-industrial-revolution" class="d-block mr-10"> <img loading="lazy" src="https://cdn.britannica.com/17/167717-131-94C99B30/boys-mill-Macon-Georgia-1909.jpg?w=68&h=68&s=crop" alt="Young boys working in a thread spinning mill in Macon, Georgia, 1909. Boys are so small they have to climb onto the spinning frame to reach and fix broken threads and put back empty bobbins. Child labor. Industrial revolution" /> </a> <div class="link-container"> <a class="" href="/story/the-rise-of-the-machines-pros-and-cons-of-the-industrial-revolution">The Rise of the Machines: Pros and Cons of the Industrial Revolution</a> </div> </li> </ul> </div> </div> </aside> <div class="reading-channel"> <div class="grey-box w-100 grey-box-middle"> <div class="grey-box-content mx-auto w-100"> <script type="application/ld+json"> { "@context" : "https://schema.org", "@type" : "BreadcrumbList", "itemListElement" : [ { "@type" : "ListItem", "position" : 1, "item" : { "@id" : "https://www.britannica.com/stories/spotlight", "name": "Spotlight" } } , { "@type" : "ListItem", "position" : 2, "item" : { "@id" : "https://www.britannica.com/stories/spotlight/Science", "name": "Science" } } ] } </script> <nav class="breadcrumb mt-20 mb-30"> <span class="breadcrumb-item "> <a href="/" class="link-gray-600">Home</a> </span> <span class="breadcrumb-item "> <a class="link-gray-600" href="/stories/spotlight">Spotlight</a> </span> <span class="breadcrumb-item "> <a class="link-gray-600" href="/stories/spotlight/Science">Science</a> </span> </nav> <div class="mb-5"> <a class="SCIENCE font-weight-semi-bold super-category-badge rounded font-14" href="/Science-Tech"> Science & Tech </a> </div> <div> <div class="d-block d-md-none md-feature-tools float-right mb-15" style="right:20px" data-feature-id="6187"> <button class="js-tooltip-actions ml-10 btn btn-xs btn-outline-blue border shadow-sm pr-10" > <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="more_vert"></em> Actions </button> <div class="md-actions-popover popover popover-sm py-5 px-0 dropdown-menu"> <div> <button class="js-modal qa-cite-modal-button btn btn-sm btn-link gtm-topic-tool " data-modal="[data-feature-id=6187] .sm-cite-modal"> <em class="material-icons mr-5 ml-n10 my-n5 md-icon" data-icon="verified"></em> Cite </button> <div class="sm-cite-modal size-lg d-none"> <div class="md-modal-body"> <div class="h2 font-serif d-flex align-items-center pb-15 border-bottom mb-15"> <em class="material-icons text-blue mr-10">verified</em>Cite </div> <div class="font-serif"> While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. </div> <div class="label mt-20 mb-10">Select Citation Style</div> <select class="js-citation-format-select form-select"> <option selected value="mla">MLA</option> <option value="apa">APA</option> <option value="chicago">Chicago Manual of Style</option> </select> <div class="citation font-serif border rounded p-15 mt-20" data-authors="John P. Rafferty" data-title="A Tale of Two Submerged Continents" data-published-date="7 Apr. 2017" data-url="https://www.britannica.com/story/a-tale-of-two-submerged-continents" > <div class="citation-text"></div> </div> <button class="js-copy-citation-button mt-20 btn btn-xs btn-outline-blue border shadow-sm pr-10" > <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="file_copy"></em> <span class="js-citation-status-text">Copy Citation</span> </button> </div> </div> </div> <div> <button class="js-share-modal-button js-modal btn btn-sm btn-link gtm-topic-tool " data-modal="[data-feature-id=6187] .md-share-modal"> <em class="material-icons mr-5 ml-n10 my-n5 md-icon" data-icon="share"></em> Share </button> <div class="md-share-modal size-lg d-none qa-share-modal"> <div class="md-modal-body"> <div class="h2 font-serif d-flex align-items-center pb-15 border-bottom"> <em class="material-icons text-blue mr-10" data-icon="share"></em> Share </div> <div class="label my-20">Share to social media</div> <div class="md-social-toolbar-circle d-flex align-items-start inverted" data-value="share" title="A Tale of Two Submerged Continents" data-url="https://www.britannica.com/story/a-tale-of-two-submerged-continents" > <a class="social-icon facebook justify-content-center d-flex align-items-center align-self-center" data-provider="facebook" href="https://www.facebook.com/BRITANNICA/" target="_blank" rel="noopener"><span>Facebook</span></a> <a class="social-icon x justify-content-center d-flex align-items-center align-self-center" data-provider="x" href="https://x.com/britannica" target="_blank" rel="noopener"><span>X</span></a> </div> <div class="label pt-20 mt-20 mb-5 border-top">URL</div> <a class="font-serif text-truncate d-inline-block" href="https://www.britannica.com/story/a-tale-of-two-submerged-continents">https://www.britannica.com/story/a-tale-of-two-submerged-continents</a> </div> </div> </div> </div> </div> <h1 class="mb-5">A Tale of Two Submerged Continents</h1> <div class="d-none d-md-flex my-15"> <div class="mr-5"> <a href="javascript:window.print()" class=" btn btn-xs btn-outline-blue border shadow-sm pr-10" > <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="print"></em> Print </a> </div> <div class="mr-5"> <button class="js-modal qa-cite-modal-button gtm-topic-tool btn btn-xs btn-outline-blue border shadow-sm pr-10" data-modal="[data-feature-id=6187] .md-cite-modal"> <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="verified"></em> Cite </button> <div class="md-cite-modal size-lg d-none"> <div class="md-modal-body"> <div class="h2 font-serif d-flex align-items-center pb-15 border-bottom mb-15"> <em class="material-icons text-blue mr-10">verified</em>Cite </div> <div class="font-serif"> While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. </div> <div class="label mt-20 mb-10">Select Citation Style</div> <select class="js-citation-format-select form-select"> <option selected value="mla">MLA</option> <option value="apa">APA</option> <option value="chicago">Chicago Manual of Style</option> </select> <div class="citation font-serif border rounded p-15 mt-20" data-authors="John P. Rafferty" data-title="A Tale of Two Submerged Continents" data-published-date="7 Apr. 2017" data-url="https://www.britannica.com/story/a-tale-of-two-submerged-continents" > <div class="citation-text"></div> </div> <button class="js-copy-citation-button mt-20 btn btn-xs btn-outline-blue border shadow-sm pr-10" > <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="file_copy"></em> <span class="js-citation-status-text">Copy Citation</span> </button> </div> </div> </div> <div> <button class="js-share-modal-button js-modal gtm-topic-tool btn btn-xs btn-outline-blue border shadow-sm pr-10" data-modal=".md-share-modal"> <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="share"></em> Share </button> <div class="md-share-modal size-lg d-none qa-share-modal"> <div class="md-modal-body"> <div class="h2 font-serif d-flex align-items-center pb-15 border-bottom"> <em class="material-icons text-blue mr-10" data-icon="share"></em> Share </div> <div class="label my-20">Share to social media</div> <div class="md-social-toolbar-circle d-flex align-items-start inverted" data-value="share" title="A Tale of Two Submerged Continents" data-url="https://www.britannica.com/story/a-tale-of-two-submerged-continents" > <a class="social-icon facebook justify-content-center d-flex align-items-center align-self-center" data-provider="facebook" href="https://www.facebook.com/BRITANNICA/" target="_blank" rel="noopener"><span>Facebook</span></a> <a class="social-icon x justify-content-center d-flex align-items-center align-self-center" data-provider="x" href="https://x.com/britannica" target="_blank" rel="noopener"><span>X</span></a> </div> <div class="label pt-20 mt-20 mb-5 border-top">URL</div> <a class="font-serif text-truncate d-inline-block" href="https://www.britannica.com/story/a-tale-of-two-submerged-continents">https://www.britannica.com/story/a-tale-of-two-submerged-continents</a> </div> </div> </div> </div> <div class="md-byline module-spacing font-12"> <div class="font-serif font-12"> <span class="written-by text-gray-700"> Written by </span> <div class="editor-popover popover p-0"> <a class="d-block p-20 gtm-byline font-12 byline-contributor" href="/editor/John-P-Rafferty/6747" > <div class="editor-title font-16 font-weight-bold">John P. Rafferty</div> <div class="editor-description font-12 font-serif mt-5 clamp-description text-black">John P. Rafferty writes about Earth processes and the environment. He serves currently as the editor of Earth and life sciences, covering climatology, geology, zoology, and other topics that relate to...</div> </a> <div data-popper-arrow></div> </div> <span class="btn btn-link editor-link p-0 qa-byline-link gtm-byline font-12 byline-contributor text-decoration-underline"> John P. Rafferty</span></div> <div class="font-serif font-12 text-gray-700"> <span class="qa-fact-checked-by">Fact-checked by</span> <div class="editor-popover popover p-0"> <a class="d-block p-20 font-12" href="/editor/The-Editors-of-Encyclopaedia-Britannica/4419" > <div class="editor-title font-16 font-weight-bold">The Editors of Encyclopaedia Britannica</div> <div class="editor-description font-12 font-serif mt-5 text-black">Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.</div> </a> <div data-popper-arrow></div> </div> <span class="btn btn-link editor-link p-0 qa-byline-link font-12 "> The Editors of Encyclopaedia Britannica</span></div></div> </div> <article class="topic-content content mt-20"><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media " data-type="image"><a href="https://cdn.britannica.com/66/194766-050-5908DD25/canyon-swell-reef-sunlight-water-surface-Pacific.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*"><img src="https://cdn.britannica.com/66/194766-050-5908DD25/canyon-swell-reef-sunlight-water-surface-Pacific.jpg?w=600&q=60" alt="Small canyon underwater carved by the swell into the fore reef with sunlight through water surface, Huahine island, Pacific ocean, French Polynesia." data-width="1600" data-height="1067" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif line-clamp"><span><button class="js-more-btn d-none btn btn-unstyled font-12 bg-white js-content" aria-label="Toggle more/less fact data"><span class="link-blue">(more)</span></button></span></div><cite class="credit d-block mt-5">漏 Seaphotoart/Dreamstime.com</cite></figcaption></figure><p class="topic-paragraph">In February 2017 separate studies examining Earth鈥檚 geological and geophysical characteristics revealed evidence of ancient sunken <a href="https://www.britannica.com/science/continent" class="md-crosslink " data-show-preview="true">continents</a> in the Indian and Pacific Oceans.</p><span class="MOD1"></span><p class="topic-paragraph">In the first study, a multinational team made up of South African, German, and Norwegian geologists and geophysicists noticed a large region of gravitational anomalies beneath the <a href="https://www.britannica.com/place/Indian-Ocean" class="md-crosslink " data-show-preview="true">Indian Ocean</a>. This difference in <a href="https://www.britannica.com/science/gravity-physics" class="md-crosslink " data-show-preview="true">gravity</a> suggested the presence of a dense mass of continental crust in the Indian Ocean between <a href="https://www.britannica.com/place/Madagascar" class="md-crosslink " data-show-preview="true">Madagascar</a> and India. The scientists reported that the gravity data was later combined with data showing the discovery of <a href="https://www.britannica.com/science/zircon" class="md-crosslink " data-show-preview="true">zircons</a> (a type of silicate mineral of volcanic origin) dated to between 2.5 billion and 3 billion years ago within far younger volcanic rocks on <a href="https://www.britannica.com/place/Mauritius" class="md-crosslink " data-show-preview="true">Mauritius</a> (an island that is thought to have formed about 8 million years ago). The age differences between rocks on the island and the zircons within the rocks suggested that the zircons formed on a landmass much older than the present-day island. The scientists hypothesized that volcanism stemming from the tectonic <a href="https://www.britannica.com/science/hotspot-geology" class="md-crosslink " data-show-preview="true">hotspot</a> that grew into Mauritius could have transported zircons from submerged continental crust to the island鈥檚 surface. The combination of the gravitational data with that provided by the zircons suggested the presence of a large, arc-shaped, submerged landmass (which the scientists called Mauritia) that extends from Mauritius to India鈥檚 southwestern coast.</p><span class="MOD2"></span><p class="topic-paragraph">Similarly, an analysis of gravitational maps of the southern <a href="https://www.britannica.com/place/Pacific-Ocean" class="md-crosslink " data-show-preview="true">Pacific Ocean</a> near Australia鈥檚 eastern coast showed the presence of a large underwater <a href="https://www.britannica.com/science/plateau-landform" class="md-crosslink " data-show-preview="true">plateau</a> upon which present-day <a href="https://www.britannica.com/place/New-Caledonia-French-unique-collectivity-Pacific-Ocean" class="md-crosslink " data-show-preview="true">New Caledonia</a>, <a href="https://www.britannica.com/place/New-Zealand" class="md-crosslink " data-show-preview="true">New Zealand</a>, and other smaller islands sit. Samples taken from the sea floor reveal that the plateau is also made up of continental crust and not the denser <a href="https://www.britannica.com/science/oceanic-crust" class="md-crosslink " data-show-preview="true">oceanic crust</a> common to other underwater features in the ocean. Scientists claimed that this large underwater plateau (which they called Zealandia) was once an emergent continent that was connected to <a href="https://www.britannica.com/place/Gondwana-supercontinent" class="md-crosslink " data-show-preview="true">Gondwana</a> (a supercontinent which lasted from perhaps 600 million to 140 million years ago). Zealandia, it seems, slipped beneath the waves sometime after it broke away from Australia about 80 million years ago. </p><span class="MOD3"></span><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="2"><div class="md-assembly-wrapper card-media " data-type="image"><a href="https://cdn.britannica.com/04/194204-050-32C2AD57/Infographic-continents-evidence-history-Earth.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*"><img src="https://cdn.britannica.com/04/194204-050-32C2AD57/Infographic-continents-evidence-history-Earth.jpg" alt="Paleocontinents infographic. Mauritia, Zealandia, Rodinia, Laurentia, Pangea, Gondwana." data-width="1600" data-height="1067" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif line-clamp"><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/04/194204-050-32C2AD57/Infographic-continents-evidence-history-Earth.jpg" data-href="*">Submerged continents</a><span>The infographic gives more information about the submerged continents of Mauritia and Zealandia.</span><button class="js-more-btn d-none btn btn-unstyled font-12 bg-white js-content" aria-label="Toggle more/less fact data"><span class="link-blue">(more)</span></button></span></div><cite class="credit d-block mt-5">Encyclop忙dia Britannica, Inc./Kenny Chmielewski</cite></figcaption></figure><span class="AM-END-OF-ARTICLE am-inline"></span></article><div class="related-info grid"><div class="col"><div class="learn-more"><h3>Learn More About This Topic</h3><ul class="list-unstyled"><li><a href="https://www.britannica.com/science/continent" class="md-crosslink " data-show-preview="true">What is a continent?</a></li><li><a href="https://www.britannica.com/science/zircon" class="md-crosslink " data-show-preview="true">Which chemical elements are used to create zircon?</a></li><li><a href="https://www.britannica.com/place/Gondwana-supercontinent" class="md-crosslink " data-show-preview="true">Which present-day landmasses were once part of Gondwana?</a></li></ul></div></div><div class="col-md-auto col-100"> <div class="related-feature mb-30"> <div class="box"> <a href="/story/is-australia-an-island" > <div class="feature-type">Story</div> <img loading="lazy" src="https://cdn.britannica.com/86/183586-131-98C46E36/World-Data-Locator-Map-Australia.jpg?w=225&h=120" alt="World Data Locator Map: Australia" /> <strong>Is Australia an Island?</strong> <p>What鈥檚 the difference between an island and a continent anyway?</p> </a> </div> </div> </div></div> </div> </div> </div> <aside class="cm-rightrail d-none d-md-block ad-rail"></aside> </div> </div> </div> </div> </main> <div class="grid gx-0"> <div class="col"> <div class="md-loading hidden display-4 font-weight-normal"></div> <div class="text-center my-20 mb-100"> <button class="md-infinite-load-next btn btn-blue" data-value="next-page">Load More</button> </div> </div> <div class="col-md-da-320 hidden-xs"> </div> </div></div> </div> </main> <div id="md-footer"></div> <noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-5W6NC8" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <script type="text/javascript" id="_informizely_script_tag"> var IzWidget = IzWidget || {}; (function (d) { var scriptElement = d.createElement('script'); scriptElement.type = 'text/javascript'; scriptElement.async = true; scriptElement.src = "https://insitez.blob.core.windows.net/site/f780f33e-a610-4ac2-af81-3eb184037547.js"; var node = d.getElementById('_informizely_script_tag'); node.parentNode.insertBefore(scriptElement, node); } )(document); </script>  <script> window.ap3c = window.ap3c || {}; var ap3c = window.ap3c; ap3c.cmd = ap3c.cmd || []; ap3c.cmd.push(function() { ap3c.init('ZO4siT4cLwnykPnzZWJtd3Byb2Q', 'https://engage.email.britannica.com/'); ap3c.track({v: 0}); }); ap3c.activity = function(act) { ap3c.act = (ap3c.act || []); ap3c.act.push(act); }; var s, t; s = document.createElement('script'); s.type = 'text/javascript'; s.src = "https://engage.email.britannica.com/app.js"; t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(s, t); </script> <script class="marketing-page-info" type="application/json"> {"pageType":"Story","templateName":"SPOTLIGHT","pageNumber":1,"pagesTotal":11,"pageId":6187,"pageLength":null,"initialLoad":true,"lastPageOfScroll":false} </script> <script class="marketing-content-info" type="application/json"> [] </script> <script src="https://cdn.britannica.com/mendel-resources/3-130/js/libs/jquery-3.5.0.min.js?v=3.130.14"></script> <script type="text/javascript" data-type="Init Mendel Code Splitting"> (function() { $.ajax({ dataType: 'script', cache: true, url: 'https://cdn.britannica.com/mendel-resources/3-130/dist/story-page.js?v=3.130.14' }); })(); </script> <script class="analytics-metadata" type="application/json"> {"leg":"A","adLeg":"A","userType":"ANONYMOUS","pageType":"Story","pageSubtype":"SPOTLIGHT","articleTemplateType":null,"gisted":false,"pageNumber":1,"hasSummarizeButton":false,"hasAskButton":false} </script> <script type="text/javascript"> EBStat={accountId:-1,hostnameOverride:'webstats.eb.com',domain:'www.britannica.com', json:''}; </script> <script type="text/javascript"> ( function() { $.ajax( { dataType: 'script', cache: true, url: '//www.britannica.com/webstats/mendelstats.js?v=1' } ) .done( function() { try {writeStat(null,EBStat);} catch(err){} } ); })(); </script> <div id="bc-fixed-dialogue"></div> </body> </html>

CINXE.COM

A Tale of Two Submerged Continents | Britannica