{"id":1199,"date":"2016-03-27T08:07:32","date_gmt":"2016-03-27T08:07:32","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/?p=1199"},"modified":"2016-03-27T08:12:58","modified_gmt":"2016-03-27T08:12:58","slug":"volcans-montagne-fin","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2016\/03\/27\/volcans-montagne-fin\/","title":{"rendered":"&#8220;Volcans&#8221; dans La Montagne (fin)"},"content":{"rendered":"<p>Entretien avec Anne Bourges dans le cadre d\u2019un article publi\u00e9 dans le quotidien \u00ab\u00a0La Montagne \u00bb le 22 mars.<\/p>\n<p>Imaginez les volcans d\u2019Auvergne lorsqu\u2019ils \u00e9taient en \u00e9ruption\u00a0! Peut-on les comparer \u00e0 d\u2019autres volcans actuellement actifs ?<\/p>\n<p>&#8211; Si je vous dis : puy Pariou ?<\/p>\n<p>&#8211; Je vous r\u00e9ponds\u00a0: piton Kapor sur le piton de la Fournaise.<\/p>\n<p>&#8211; Si je vous dis : puy de D\u00f4me ?<\/p>\n<p>&#8211; Je vous r\u00e9ponds\u00a0: Sinabung en Indon\u00e9sie.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1202\" src=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2016\/03\/2016.03.22.La_Montagne-1.jpg-1-302x450.jpg\" alt=\"2016.03.22.La_Montagne.jpg\" width=\"469\" height=\"699\" srcset=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2016\/03\/2016.03.22.La_Montagne-1.jpg-1-302x450.jpg 302w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2016\/03\/2016.03.22.La_Montagne-1.jpg-1-686x1024.jpg 686w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2016\/03\/2016.03.22.La_Montagne-1.jpg-1.jpg 760w\" sizes=\"auto, (max-width: 469px) 100vw, 469px\" \/>L&#8217;article paru dans \u00ab La Montagne \u00bb.<\/p>\n<p>&nbsp;<\/p>\n<p>&#8211; Et si je vous dis : Cantal, ce g\u00e9ant auvergnat ?<\/p>\n<p>&#8211; Il a \u00e9t\u00e9 \u00e9norme ! On peut le comparer \u00e0 l\u2019Etna en Sicile.<\/p>\n<p>Le Cantal, de forme elliptique, mesure 70 km de l&#8217;ouest \u00e0 l&#8217;est et 50 km du nord au sud : c&#8217;est le plus grand volcan d&#8217;Europe, \u00e0 \u00e9galit\u00e9 avec l&#8217;Etna. Il s&#8217;agit d&#8217;un \u00ab strato-volcan \u00bb, constitu\u00e9 d&#8217;un empilement (stratification), de coul\u00e9es de lave et de niveaux de tephra (bombes, cendres, ponces&#8230;). Ceci t\u00e9moigne de l&#8217;alternance de dynamismes effusifs et explosifs.<\/p>\n<p>Sa partie centrale s&#8217;est effondr\u00e9e en une gigantesque caldeira. Puis les glaciers de l&#8217;\u00e8re Quaternaire ont achev\u00e9 de le diss\u00e9quer. Dans les anciennes vall\u00e9es glaciaires coulent aujourd&#8217;hui des rivi\u00e8res : C\u00e8re, Jordanne, Mars, Santoire&#8230;<\/p>\n<p>Le massif culmine \u00e0 1 855 m\u00e8tres au Plomb du Cantal, qui domine l\u00e9g\u00e8rement le puy Mary (1 785 m\u00e8tres), tous les deux situ\u00e9s en bordure de caldeira, et le puy Griou (1 694 m\u00e8tres) au centre de la caldeira.<\/p>\n<p>Son activit\u00e9 a dur\u00e9 10 millions d\u2019ann\u00e9es\u00a0! Elle a commenc\u00e9 il y a 13 millions d&#8217;ann\u00e9es et s&#8217;est termin\u00e9e il y a 3 millions d&#8217;ann\u00e9es. Il est donc d\u00e9finitivement \u00e9teint.<\/p>\n<p><!--more--><\/p>\n<p>L&#8217; Etna, est tr\u00e8s actif depuis 300 000 ans. Plusieurs crat\u00e8res coexistent \u00e0 son sommet mais la topographie change en fonction des \u00e9ruptions fr\u00e9quentes, tant\u00f4t effusives, tant\u00f4t explosives.<\/p>\n<p>Ce volcan mesure plus de 3 300 m\u00e8tres de haut. On peut donc penser \u00e0 juste titre que le Cantal fut aussi haut jadis. Imaginez la France avec en son centre une montagne presque aussi haute que le mont Blanc !<\/p>\n<p>J\u2019ai le plaisir de donner une conf\u00e9rence sur ce sujet le 1er avril, 20 heures, au Centre Permanent d\u2019Initiatives pour l\u2019Environnement (CPIE) Clermont-D\u00f4mes \u00e0 Theix, 63122 Saint-Gen\u00e8s-Champanelle.<\/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>Entretien avec Anne Bourges dans le cadre d\u2019un article publi\u00e9 dans le quotidien \u00ab\u00a0La Montagne \u00bb le 22 mars. Imaginez les volcans d\u2019Auvergne lorsqu\u2019ils \u00e9taient en \u00e9ruption\u00a0! Peut-on les comparer \u00e0 d\u2019autres volcans actuellement actifs ? &#8211; Si je vous dis : puy Pariou ? &#8211; Je vous r\u00e9ponds\u00a0: piton Kapor sur le piton de &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2016\/03\/27\/volcans-montagne-fin\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">&#8220;Volcans&#8221; dans La Montagne (fin)<\/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":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[52,21,410,61,402,18,224,3,13],"class_list":["post-1199","post","type-post","status-publish","format-standard","hentry","category-actualites","tag-auvergne","tag-bardintzeff","tag-bourges","tag-cantal","tag-cpie-clermont-domes","tag-etna","tag-la-montagne","tag-volcan","tag-volcanologue"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>&quot;Volcans&quot; dans La Montagne (fin), par Jacques-Marie Bardintzeff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2016\/03\/27\/volcans-montagne-fin\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"&quot;Volcans&quot; dans La Montagne (fin), par Jacques-Marie Bardintzeff\" \/>\n<meta property=\"og:description\" content=\"Entretien avec Anne Bourges dans le cadre d\u2019un article publi\u00e9 dans le quotidien \u00ab\u00a0La Montagne \u00bb le 22 mars. Imaginez les volcans d\u2019Auvergne lorsqu\u2019ils \u00e9taient en \u00e9ruption\u00a0! 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