{"id":10507,"date":"2016-01-14T19:14:49","date_gmt":"2016-01-14T18:14:49","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=10507"},"modified":"2016-01-14T19:14:49","modified_gmt":"2016-01-14T18:14:49","slug":"le-plus-grand-canyon-au-monde-pourrait-se-cacher-sous-la-glace-de-lantarctique","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/le-plus-grand-canyon-au-monde-pourrait-se-cacher-sous-la-glace-de-lantarctique\/","title":{"rendered":"Le plus grand canyon au monde pourrait se cacher sous la glace de l&rsquo;Antarctique"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Des scientifiques britanniques viennent de trouver les traces d&rsquo;un canyon g\u00e9ant en Antarctique. Selon les donn\u00e9es satellites, la gorge se situerait sous la calotte glaciaire, au niveau de la Terre de la Reine-Elizabeth. Si la d\u00e9couverte se confirme, ce pourrait \u00eatre le plus grand canyon au monde.<\/p>\n<p>M\u00eame si notre plan\u00e8te commence \u00e0 \u00eatre bien cartographi\u00e9e, de nombreuses zones d&rsquo;ombre subsistent encore. Une d\u00e9couverte r\u00e9alis\u00e9e dans l&rsquo;est de l&rsquo;Antarctique vient une nouvelle fois d&rsquo;en apporter la preuve. Sous la glace du continent, se trouverait un gigantesque canyon.<\/p>\n<p>La trouvaille a \u00e9t\u00e9 r\u00e9alis\u00e9e par des chercheurs de l&rsquo;Universit\u00e9 de Durham, plus pr\u00e9cis\u00e9ment au niveau de la Terre de la Reine-Elizabeth, au sud de l&rsquo;Antarctique. Publi\u00e9e dans la revue Geology, l&rsquo;\u00e9tude indique que la canyon serait invisible \u00e0 l&rsquo;\u00bdil nu. Il aurait ainsi \u00e9t\u00e9 d\u00e9tect\u00e9 gr\u00e2ce \u00e0 la pr\u00e9sence de motifs tr\u00e8s particuliers \u00e0 la surface glac\u00e9e.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Le professeur Steward Jamieson, principal auteur de l&rsquo;\u00e9tude explique \u00e0 la BBC : \u00ab\u00a0Lorsqu&rsquo;on regarde la Terre de la Reine-Elizabeth avec des donn\u00e9es satellites, il semble qu&rsquo;il y ait des motifs lin\u00e9aires sur la surface de la glace, qui, pour nous, ressemblent fortement \u00e0 un canyon\u00a0\u00bb.<\/p>\n<p>Le plus grand canyon au monde ?<\/p>\n<p>Si la d\u00e9couverte est d\u00e9j\u00e0 remarquable, elle ne s&rsquo;arr\u00eate pas l\u00e0 car les dimensions du syst\u00e8me auraient aussi de quoi impressionner. Selon les sp\u00e9cialistes, il pourrait bien atteindre plus de 1.000 kilom\u00e8tres de long pour un kilom\u00e8tre de profondeur par endroits. En comparaison, le Grand Canyon des \u00c9tats-Unis pr\u00e9sente une profondeur similaire mais ne fait que 450 km de long.<br \/>\nCes informations restent encore \u00e0 v\u00e9rifier, notamment via des analyses g\u00e9ologiques sur place, ce qui est pr\u00e9vu tr\u00e8s prochainement. N\u00e9anmoins, si la d\u00e9couverte se confirme, il s&rsquo;agirait du plus grand canyon jamais d\u00e9couvert sur notre plan\u00e8te.<\/p>\n<p>source :\u00a0<a href=\"http:\/\/www.maxisciences.com\/canyon\/le-plus-grand-canyon-au-monde-pourrait-se-cacher-sous-la-glace-de-l-039-antarctique_art36981.html\" target=\"_blank\">http:\/\/www.maxisciences.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"10507\">(464)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Des scientifiques britanniques viennent de trouver les traces d&rsquo;un canyon g\u00e9ant en Antarctique. Selon les donn\u00e9es satellites, la gorge se&#8230;<\/p>\n","protected":false},"author":1,"featured_media":10508,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Le plus grand #canyon au monde pourrait se cacher sous la glace de l'#Antarctique @laterredufutur","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[19],"tags":[1252,156,4808,538,267,2563,5416],"class_list":["post-10507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seismes-et-volcans","tag-antarctique","tag-banquise","tag-canyon","tag-decouverte","tag-glace","tag-profondeur","tag-sous-la-glace","wpcat-19-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/antarctique.jpeg?fit=1024%2C768&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-2Jt","jetpack-related-posts":[{"id":26142,"url":"https:\/\/www.laterredufutur.com\/accueil\/selon-une-etude-les-canyons-sous-marins-jouent-un-role-crucial-dans-linstabilite-de-la-calotte-glaciaire-de-lantarctique\/","url_meta":{"origin":10507,"position":0},"title":"Selon une \u00e9tude, les canyons sous-marins jouent un r\u00f4le crucial dans l&rsquo;instabilit\u00e9 de la calotte glaciaire de l&rsquo;Antarctique","author":"Admin","date":"15 ao\u00fbt 2024","format":false,"excerpt":"Les canyons antarctiques jouent un r\u00f4le crucial dans l'instabilit\u00e9 de l'inlandsis de l'Antarctique oriental, car ils facilitent le transfert d'eau relativement chaude (eaux profondes circumpolaires) des zones abyssales vers le plateau continental et, de l\u00e0, vers la base de l'inlandsis, contribuant ainsi \u00e0 sa fonte. Une \u00e9tude, men\u00e9e par une\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/08\/canyons-antarctique.jpg?fit=1200%2C847&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/08\/canyons-antarctique.jpg?fit=1200%2C847&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/08\/canyons-antarctique.jpg?fit=1200%2C847&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/08\/canyons-antarctique.jpg?fit=1200%2C847&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/08\/canyons-antarctique.jpg?fit=1200%2C847&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":22436,"url":"https:\/\/www.laterredufutur.com\/accueil\/lantarctique-est-la-plus-grande-region-volcanique-du-monde\/","url_meta":{"origin":10507,"position":1},"title":"L&rsquo;Antarctique est la plus grande r\u00e9gion volcanique du monde","author":"Admin","date":"23 avril 2021","format":false,"excerpt":"En ao\u00fbt 2017, des scientifiques ont d\u00e9couvert 91 volcans sous la calotte glaciaire antarctique, le plus haut \u00e9tant aussi haut que la montagne Eiger des Alpes Suisses, qui culmine \u00e0 pr\u00e8s de 4000 m\u00e8tres. Ceci s'ajoute aux 47 volcans sous-glaciaires d\u00e9j\u00e0 connus en Antarctique. Cela en fait la plus grande\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/antarctique-region-volcanique-1.jpg?fit=1024%2C683&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/antarctique-region-volcanique-1.jpg?fit=1024%2C683&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/antarctique-region-volcanique-1.jpg?fit=1024%2C683&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/antarctique-region-volcanique-1.jpg?fit=1024%2C683&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3942,"url":"https:\/\/www.laterredufutur.com\/accueil\/dossier-n3-les-courants-marins\/","url_meta":{"origin":10507,"position":2},"title":"Dossier N\u00b03 : Les Courants Marins","author":"Admin","date":"10 avril 2007","format":false,"excerpt":"Voici un dossier, en\u00a04 parties qui seront publi\u00e9es sur la Terre du Futur, transmis par Fifi321fth (Thomas), pass\u00e9 au lyc\u00e9e Sacr\u00e9-Coeur \u00e0 Reims. Thomas L., Enguerran D., Juliette M. Dossier Exclusif sur les Courants Marins et de ce qui en r\u00e9sulte. Ici 3 eme partie. Des mesures satellitaires ont r\u00e9v\u00e9l\u00e9\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/laterredufutur.com\/spaw\/images\/courant15.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/laterredufutur.com\/spaw\/images\/courant15.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/laterredufutur.com\/spaw\/images\/courant15.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":25638,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-immense-canyon-decouvert-en-mediterranee\/","url_meta":{"origin":10507,"position":3},"title":"Un immense canyon d\u00e9couvert en M\u00e9diterran\u00e9e","author":"Admin","date":"25 f\u00e9vrier 2024","format":false,"excerpt":"Un canyon sous-marin long de 10 kilom\u00e8tres et profond de 500 m\u00e8tres a \u00e9t\u00e9 d\u00e9couvert en M\u00e9diterran\u00e9e. Une nouvelle \u00e9tude r\u00e9v\u00e8le qu\u2019il se serait form\u00e9 sous l\u2019eau, il y a 6 millions d\u2019ann\u00e9es, alors que la mer commen\u00e7ait \u00e0 s\u2019ass\u00e9cher. Les fonds marins sont marqu\u00e9s de nombreux reliefs : monts,\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/canyon-sous-marin.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/canyon-sous-marin.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/canyon-sous-marin.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/canyon-sous-marin.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23559,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-glacier-decouvert-sur-mars\/","url_meta":{"origin":10507,"position":4},"title":"Un glacier d\u00e9couvert sur Mars","author":"Admin","date":"20 d\u00e9cembre 2021","format":false,"excerpt":"L\u2019Institut russe de recherche spatiale et l\u2019ESA annoncent avoir d\u00e9couvert ce qui pourrait \u00eatre un glacier g\u00e9ant sous la surface de Mars, gr\u00e2ce au t\u00e9lescope \u00e0 neutrons russe FREND, qui cartographie l'hydrog\u00e8ne dans le sol martien. La zone en question fait \u00e0 peu pr\u00e8s la taille des Pays-Bas. Un appareil\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/Valles-Marineris.jpg?fit=960%2C600&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/Valles-Marineris.jpg?fit=960%2C600&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/Valles-Marineris.jpg?fit=960%2C600&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/Valles-Marineris.jpg?fit=960%2C600&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":2062,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-volcan-en-activite-decouvert-sous-la-glace-de-lantarctique\/","url_meta":{"origin":10507,"position":5},"title":"Un volcan en activit\u00e9 d\u00e9couvert sous la glace de l\u2019Antarctique","author":"Admin","date":"22 juin 2014","format":false,"excerpt":"Des sismologues ont d\u00e9couvert un nouveau volcan en activit\u00e9 sous les glaces de l'Antarctique, dans la r\u00e9gion dite de la Terre Marie Byrd (ci-dessus). Cr\u00e9dits : NASA\/Michael Studinger Un nouveau volcan en activit\u00e9 a \u00e9t\u00e9 d\u00e9couvert sous la calotte glac\u00e9e de l'Antarctique par des sismologues am\u00e9ricains. Les enregistrements r\u00e9alis\u00e9s sugg\u00e8rent\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2014\/06\/.._photos_antarctic-volcan-0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=10507"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10507\/revisions"}],"predecessor-version":[{"id":10509,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10507\/revisions\/10509"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/10508"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=10507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=10507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=10507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}