{"id":10317,"date":"2016-01-13T00:00:12","date_gmt":"2016-01-12T23:00:12","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=10317"},"modified":"2016-01-12T16:48:55","modified_gmt":"2016-01-12T15:48:55","slug":"lapparition-des-dinosaures-aurait-ete-ultrarapide","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/lapparition-des-dinosaures-aurait-ete-ultrarapide\/","title":{"rendered":"L&rsquo;apparition des dinosaures aurait \u00e9t\u00e9 ultrarapide"},"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 style=\"text-align: justify;\">Il semble que quelques millions d&rsquo;ann\u00e9es tout au plus s\u00e9parent les premiers animaux dinosauromorphes des premiers dinosaures, selon une \u00e9quipe internationale de pal\u00e9ontologues. Les chercheurs sont arriv\u00e9s \u00e0 cette conclusion \u00e9tonnante en datant pr\u00e9cis\u00e9ment pour la premi\u00e8re fois la formation Cha\u00f1ares, en Argentine.<\/p>\n<p style=\"text-align: justify;\">Il y a 252 millions d\u2019ann\u00e9es, 95 % des esp\u00e8ces marines et 70 % des esp\u00e8ces vivant sur les continents ont \u00e9t\u00e9 extermin\u00e9es par un \u00e9v\u00e8nement dont la nature exacte fait encore d\u00e9bat. Celui-ci a mis fin au Permien et au Pal\u00e9ozo\u00efque ; il a aussi fait d\u00e9buter le Trias, p\u00e9riode marqu\u00e9e par la mont\u00e9e en puissance des dinosaures.<\/p>\n<p style=\"text-align: justify;\">Les plus anciens dinosaures connus par des fossiles sont des carnivores \u00e2g\u00e9s de 225 \u00e0 230 millions d&rsquo;ann\u00e9es, Eoraptor et Herrerasaurus, d\u00e9couverts dans la formation d&rsquo;Ischigualasto, en Argentine. Les dinosaures descendraient des archosaures, un taxon qui a \u00e9galement donn\u00e9 naissance aux pt\u00e9rosaures, aujourd\u2019hui \u00e9teints, et aux crocodiles. Peu de choses sont connues sur ces terribles reptiles, \u00e0 commencer par la date de leur apparition, qui pourrait remonter au Trias moyen, voici 235 \u00e0 245 millions d\u2019ann\u00e9es.<\/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 style=\"text-align: justify;\">Une \u00e9quipe internationale de pal\u00e9ontologues et g\u00e9ologues vient pourtant de faire progresser le d\u00e9bat sur cette question en datant plus pr\u00e9cis\u00e9ment la c\u00e9l\u00e8bre formation Cha\u00f1ares, en Argentine, comme elle l\u2019explique dans un article paru dans Pnas.<\/p>\n<p style=\"text-align: justify;\">La formation Cha\u00f1ares ne contient pas de fossiles ou squelettes de dinosaures mais elle renferme en revanche une grande vari\u00e9t\u00e9 d\u2019esp\u00e8ces cousines semblant \u00eatre apparues au Trias. Sa datation pr\u00e9cise pouvait donc permettre, a priori, de mieux conna\u00eetre la date d\u2019apparition probable des premiers dinosaures, d\u00e9duite des fossiles de la formation d&rsquo;Ischigualasto.<\/p>\n<p style=\"text-align: justify;\">Les chercheurs ont ainsi voulu encadrer l\u2019\u00e2ge probable de la formation Cha\u00f1ares en datant les couches en bas et en haut. Les r\u00e9sultats obtenus ont \u00e9t\u00e9 \u00e9tonnants : les plus vieux zircons sont \u00e2g\u00e9s de 236 millions d\u2019ann\u00e9es et les plus jeunes de 234 millions d\u2019ann\u00e9es tout au plus. Les dinosaures semblent donc avoir fait leur apparition tr\u00e8s rapidement.<\/p>\n<p style=\"text-align: justify;\">source et extrait de <a href=\"http:\/\/www.futura-sciences.com\/\" target=\"_blank\">http:\/\/www.futura-sciences.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"10317\">(980)<\/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>Il semble que quelques millions d&rsquo;ann\u00e9es tout au plus s\u00e9parent les premiers animaux dinosauromorphes des premiers dinosaures, selon une \u00e9quipe&#8230;<\/p>\n","protected":false},"author":1,"featured_media":10318,"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_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":"L'apparition des #dinosaures aurait \u00e9t\u00e9 ultrarapide @laterreduftur","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},"jetpack_post_was_ever_published":false},"categories":[33],"tags":[1985,2438,1099,1206,130,5259],"class_list":["post-10317","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archeologie","tag-apparition","tag-archeologie","tag-argentine","tag-dinosaures","tag-monde","tag-rapidite","wpcat-33-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/dinosaures.jpg?fit=620%2C493&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-2Gp","jetpack-related-posts":[{"id":12062,"url":"https:\/\/www.laterredufutur.com\/accueil\/asteroide-ou-pas-les-dinosaures-devaient-mourir\/","url_meta":{"origin":10317,"position":0},"title":"Ast\u00e9ro\u00efde ou pas, les dinosaures devaient mourir","author":"Admin","date":"12 mai 2016","format":false,"excerpt":"D'apr\u00e8s une nouvelle \u00e9tude publi\u00e9e dans une revue britannique, les dinosaures \u00e9taient d\u00e9j\u00e0 en voie d'extinction quand la collision fatale entre un ast\u00e9ro\u00efde g\u00e9ant et la plan\u00e8te Terre a pr\u00e9cipit\u00e9 leur chute. Longtemps, on a cru que les dinosaures avaient disparu \u00e0 la suite de la chute sur terre d'un\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/dinosaures.jpg?fit=620%2C493&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/dinosaures.jpg?fit=620%2C493&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/dinosaures.jpg?fit=620%2C493&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":24831,"url":"https:\/\/www.laterredufutur.com\/accueil\/lepisode-carnien-ou-la-terre-a-connu-2-millions-dannees-de-fortes-pluies-incessantes\/","url_meta":{"origin":10317,"position":1},"title":"L&rsquo;\u00e9pisode Carnien o\u00f9 la Terre a connu 2 millions d&rsquo;ann\u00e9es de fortes pluies incessantes","author":"Admin","date":"2 avril 2023","format":false,"excerpt":"Au cours de son histoire, notre plan\u00e8te aura essuy\u00e9 plusieurs \u00e9pisodes climatiques de longue dur\u00e9e, tels que des \u00e8res glaciaires ou de grandes phases de s\u00e9cheresse. Il y a plus de 230 millions d\u2019ann\u00e9es, peu avant que les dinosaures ne pointent le bout de leur gueule, la Terre fut \u00e9galement\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/pluie-tempete.jpg?fit=1101%2C595&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/pluie-tempete.jpg?fit=1101%2C595&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/pluie-tempete.jpg?fit=1101%2C595&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/pluie-tempete.jpg?fit=1101%2C595&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/pluie-tempete.jpg?fit=1101%2C595&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":22100,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-primates-sont-apparus-juste-apres-la-disparition-des-dinosaures\/","url_meta":{"origin":10317,"position":2},"title":"Les primates sont apparus juste apr\u00e8s la disparition des dinosaures","author":"Admin","date":"3 mars 2021","format":false,"excerpt":"La d\u00e9couverte de fossiles sur un site pal\u00e9ontologique du Montana (\u00c9tats-Unis) a permis \u00e0 des scientifiques de r\u00e9viser leurs certitudes quant \u00e0 l\u2019apparition sur Terre des premiers primates. Ils auraient en effet \u00e9t\u00e9 pr\u00e9sents sur notre plan\u00e8te un peu plus de 100\u2009000 ans apr\u00e8s l\u2019extinction des dinosaures, soit plus t\u00f4t\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/03\/premiers-primates.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/03\/premiers-primates.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/03\/premiers-primates.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/03\/premiers-primates.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/03\/premiers-primates.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":14225,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-queue-dun-petit-dinosaure-a-plumes-retrouvee-prisonniere-dun-bloc-dambre\/","url_meta":{"origin":10317,"position":3},"title":"La queue d&rsquo;un petit dinosaure \u00e0 plumes retrouv\u00e9e prisonni\u00e8re d&rsquo;un bloc d&rsquo;ambre","author":"Admin","date":"10 d\u00e9cembre 2016","format":false,"excerpt":"On pourrait croire \u00e0 un nouvel \u00e9pisode de Jurassik Park. Ce fossile de la taille d'un abricot sec est vieux de 99 millions d'ann\u00e9es. Il a \u00e9t\u00e9 retrouv\u00e9 en Birmanie, et comporte des os, des tissus mous et des plumes. Une partie de la queue d'un petit dinosaure vieux de\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/12\/dinosaure-ambre-4.jpg?fit=1190%2C793&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/12\/dinosaure-ambre-4.jpg?fit=1190%2C793&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/12\/dinosaure-ambre-4.jpg?fit=1190%2C793&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/12\/dinosaure-ambre-4.jpg?fit=1190%2C793&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/12\/dinosaure-ambre-4.jpg?fit=1190%2C793&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":15230,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-dinosaure-momie-de-110-millions-dannees\/","url_meta":{"origin":10317,"position":4},"title":"Un dinosaure \u00ab\u00a0momie\u00a0\u00bb de 110 millions d&rsquo;ann\u00e9es","author":"Admin","date":"25 mai 2017","format":false,"excerpt":"Le fossile de ce nodosaure est exceptionnellement bien conserv\u00e9. Les pal\u00e9ontologues l'\u00e9tudient attentivement depuis 2011, raconte \"Le Figaro\". C'est une pi\u00e8ce exceptionnelle que peuvent d\u00e9couvrir les visiteurs du Royal Tyrrell Museum \u00e0 Drumheller en Alberta au Canada, le fossile d'un dinosaure vieux de 110 millions d'ann\u00e9es. Il s'agit d'un nodosaure,\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/dinosaure-momie.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\/2017\/05\/dinosaure-momie.jpg?fit=1024%2C683&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/dinosaure-momie.jpg?fit=1024%2C683&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/dinosaure-momie.jpg?fit=1024%2C683&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":19007,"url":"https:\/\/www.laterredufutur.com\/accueil\/retour-vers-le-passe-dans-une-fantastique-simulation\/","url_meta":{"origin":10317,"position":5},"title":"Retour vers le Pass\u00e9 dans une fantastique simulation","author":"Admin","date":"17 avril 2019","format":false,"excerpt":"Retour vers le pass\u00e9 ! o\u00f9 \u00eates vous ? Cr\u00e9tac\u00e9 tardif. Une extinction de masse se produit, entra\u00eenant l'extinction de dinosaures, de nombreux reptiles marins, de tous les reptiles volants et de nombreux invert\u00e9br\u00e9s marins et autres esp\u00e8ces. Les scientifiques pensent que l'extinction a \u00e9t\u00e9 caus\u00e9e par un impact ast\u00e9ro\u00efde\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/04\/ancient-earth-globe-paris.jpg?fit=730%2C411&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/04\/ancient-earth-globe-paris.jpg?fit=730%2C411&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/04\/ancient-earth-globe-paris.jpg?fit=730%2C411&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/04\/ancient-earth-globe-paris.jpg?fit=730%2C411&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10317","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=10317"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10317\/revisions"}],"predecessor-version":[{"id":10319,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/10317\/revisions\/10319"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/10318"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=10317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=10317"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=10317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}