{"id":5633,"date":"2016-05-12T12:22:07","date_gmt":"2016-05-12T12:22:07","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=5633"},"modified":"2016-05-19T13:06:16","modified_gmt":"2016-05-19T13:06:16","slug":"zoom-cratere-impact-pingualuit","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/05\/12\/zoom-cratere-impact-pingualuit\/","title":{"rendered":"Zoom sur le crat\u00e8re d&#8217;impact des Pingualuit"},"content":{"rendered":"<p><strong>Au Nunavik, \u00e0 l&#8217;extr\u00e9mit\u00e9 nord du Qu\u00e9bec, le\u00a0crat\u00e8re des Pingualuit est l&#8217;exemple d&#8217;un jeune crat\u00e8re d&#8217;impact parfaitement conserv\u00e9.<\/strong><\/p>\n<p>Il y a 1,4 million d\u2019ann\u00e9es une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/24\/les-grosses-meteorites-inquietent-les-scientifiques\/\" target=\"_blank\">m\u00e9t\u00e9orite <\/a>d\u2019environ 125 m de diam\u00e8tre (provenant de la ceinture d&#8217;ast\u00e9ro\u00efdes situ\u00e9e entre les plan\u00e8tes <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/04\/15\/sur-la-planete-mars-le-vent-fait-son-oeuvre\/\" target=\"_blank\">Mars <\/a>et <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/03\/07\/8-mars-la-planete-jupiter-est-au-plus-pres-de-la-terre\/\" target=\"_blank\">Jupiter<\/a>) a frapp\u00e9 le nord de la p\u00e9ninsule d\u2019Ungava dans la r\u00e9gion du Nunavik au Qu\u00e9bec, y creusant un trou presque parfait de 3,4 km de diam\u00e8tre pour une profondeur de 250 m.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x2hwwve\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : un ast\u00e9ro\u00efde menace-t-il notre plan\u00e8te ?<\/strong><\/p>\n<p>\u00a0L&#8217;\u00e9nergie d\u00e9gag\u00e9e lors de l&#8217;impact fut \u00e9quivalente \u00e0 8.500 bombes comme celle qui d\u00e9vasta la ville japonaise d&#8217;<a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-asteroides-26-hiroshima-ont-frappe-terre-depuis-2000-53466\/\" target=\"_blank\">Hiroshima<\/a> le 6 ao\u00fbt 1945 (par comparaison la m\u00e9t\u00e9orite de 12.000 tonnes qui se d\u00e9sint\u00e9gra\u00a0dans le ciel de l\u2019Oural au-dessus de la ville de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/25\/en-video-retour-sur-le-bolide-de-tcheliabinsk-en-2013\/\" target=\"_blank\">Tcheliabinsk <\/a>le\u00a015 f\u00e9vrier 2013 d\u00e9gagea une \u00e9nergie \u00e9quivalente \u00e0 35 fois celle de la bombe atomique d\u2019Hiroshima).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit.jpg\"  rel=\"lightbox[5633] attachment wp-att-5634\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5634\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit-450x312.jpg\" alt=\"cratere_pingualuit\" width=\"450\" height=\"312\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit-450x312.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit-768x532.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit-1024x709.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/04\/cratere_pingualuit.jpg 1183w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Le crat\u00e8re s&#8217;est rempli d&#8217;eau de pluie au fil du temps, en faisant un lac aux eaux particuli\u00e8rement limpides surnomm\u00e9 parfois l&#8217;\u0153il de cristal. Ce lac, actuellement l&#8217;un des plus purs et les plus transparents de la plan\u00e8te, est aussi tr\u00e8s fragile : plus de 300 ans sont n\u00e9cessaires pour renouveler la totalit\u00e9 de son volume.<!--more--><\/p>\n<p>Petite curiosit\u00e9, le\u00a0crat\u00e8re des Pingualuit n&#8217;abrite qu&#8217;une seule esp\u00e8ce de poisson, et pour cause : il s&#8217;agit de l&#8217;omble chevalier, un salmonid\u00e9 qui se nourrit presque exclusivement de poisson, ce qui lui vaut le surnom d&#8217;omble cannibale !<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Au Nunavik, \u00e0 l&#8217;extr\u00e9mit\u00e9 nord du Qu\u00e9bec, le\u00a0crat\u00e8re des Pingualuit est l&#8217;exemple d&#8217;un jeune crat\u00e8re d&#8217;impact parfaitement conserv\u00e9. Il y a 1,4 million d\u2019ann\u00e9es une m\u00e9t\u00e9orite d\u2019environ 125 m de diam\u00e8tre (provenant de la ceinture d&#8217;ast\u00e9ro\u00efdes situ\u00e9e entre les plan\u00e8tes Mars et Jupiter) a frapp\u00e9 le nord de la p\u00e9ninsule d\u2019Ungava dans la r\u00e9gion du &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/05\/12\/zoom-cratere-impact-pingualuit\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Zoom sur le crat\u00e8re d&#8217;impact des Pingualuit<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":5634,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[551,1628,553,1629,1631,1630],"class_list":["post-5633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-ceinture-dasteroides","tag-cratere-des-pingualuit","tag-meteorite","tag-nunavik","tag-omble-chevalier","tag-quebec"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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