{"id":1385,"date":"2016-06-09T12:30:59","date_gmt":"2016-06-09T11:30:59","guid":{"rendered":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/?page_id=1385"},"modified":"2016-06-24T08:15:57","modified_gmt":"2016-06-24T07:15:57","slug":"a-finir-photographies","status":"publish","type":"page","link":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/","title":{"rendered":"Photographies"},"content":{"rendered":"<h3>Th\u00e8mes propos\u00e9s<\/h3>\n<ol>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-nature-de-la-croute-continentale-et-du-manteau\/\">Nature de la cro\u00fbte continentale et du manteau<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-differenciation-magmatique\/\">Diff\u00e9renciation magmatique<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/diversite-des-edifices-volcaniques\/\">Diversit\u00e9 des \u00e9difices volcaniques<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-nature-et-diversite-des-emissions-volcaniques\/\">Nature et diversit\u00e9 des \u00e9missions volcaniques<\/a><\/li>\n<\/ol>\n<h1><b>Types d&rsquo;\u00e9missions volcaniques<\/b><\/h1>\n<h2>Bombes volcaniques<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/bombes1\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/bombes1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-1388\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-1388'>\n\t\t\t\tChamp de bombes (puy de la Vache).\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/bombes4\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/bombes4-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-1391\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-1391'>\n\t\t\t\tBombe en \u00ab\u00a0bouse de vache\u00a0\u00bb (20 cm dans la longueur).\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/bombes3\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/bombes3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-1390\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-1390'>\n\t\t\t\tCoupe transversale dans une bombe en \u00ab\u00a0fuseau\u00a0\u00bb. Le coeur est constitu\u00e9 d&rsquo;une lave basaltique massive alors que la p\u00e9riph\u00e9rie est constitu\u00e9e de lave basaltique bulleuse.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/bombes2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/bombes2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-1389\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-1389'>\n\t\t\t\tBombe en \u00ab\u00a0fuseau\u00a0\u00bb du puy de la Vache.\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h2 id=\"aydat\">Coul\u00e9es de lave<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-2 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-2 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-2 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-2 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-2' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/coulee_aydat2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/coulee_aydat2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-1394\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-2-1394'>\n\t\t\t\tFront de la coul\u00e9e d&rsquo;Aydat pr\u00e9sentant des accumulations de projections tomb\u00e9es sur le dos de la coul\u00e9e et entra\u00een\u00e9es avec elle \u00e0 la fa\u00e7on d&rsquo;un tapis roulant.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/grotte_chien\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/grotte_chien-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-1395\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-2-1395'>\n\t\t\t\tCoul\u00e9e de lave prism\u00e9e basaltique \u00e0 Royat. La Grotte des laveuses r\u00e9sulte de la vaporisation d&rsquo;eau sous-volcanique ayant conduit \u00e0 la formation d&rsquo;une \u00e9norme bulle de vapeur qui est rest\u00e9e emprisonn\u00e9e sous cette coul\u00e9e.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/prismes_chaussee_geant\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/prismes_chaussee_geant-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-1396\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-2-1396'>\n\t\t\t\tLa coul\u00e9e de lave prism\u00e9e (Royat) est  ici partiellement \u00e9rod\u00e9e et montre des coupes transversales au sein des orgues basaltiques.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/prismes_tassement\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/prismes_tassement-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-1397\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-2-1397'>\n\t\t\t\t\tLes prismes pr\u00e9sentent des successions de renflements traduisant un tassement de la coul\u00e9e lors de sa mise en place et de son refroidissement.\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/coulee_aydat1\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/coulee_aydat1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-1398\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-2-1398'>\n\t\t\t\tCoupe dans la coul\u00e9e d&rsquo;Aydat (cheire d&rsquo;Aydat) \u00e0 Saint-Saturnin: la lave de nature basaltique y est compacte et grossi\u00e8rement prism\u00e9e. La base de la coul\u00e9e (semelle) se laisse devin\u00e9e par son aspect scoriac\u00e9.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Nappes de cendres et de ponces<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-3 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-3 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-3 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-3 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-3' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/ponces_detail\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/ponces_detail-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-3-1399\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-3-1399'>\n\t\t\t\tPonces (\u00e9l\u00e9ments grisatres) noy\u00e9es dans des cendres.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/ponces_affleurement\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/ponces_affleurement-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-3-1400\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-3-1400'>\n\t\t\t\tNappe de cendres et de ponces (hauteur approximative 15 m) \u00e0 Rochefort-Montagne.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<p>Cette nappe de cendres et de ponces ne provient pas d&rsquo;un \u00e9difice volcanique de la Cha\u00eene des Puys mais du massif des Monts Dore. Elle est souvent nomm\u00e9e \u00ab\u00a0Grande nappe\u00a0\u00bb eu \u00e9gard \u00e0 l&rsquo;importance des d\u00e9p\u00f4ts qu&rsquo;elle repr\u00e9sente (8 km<sup>3<\/sup> au total r\u00e9partis sur 500 km<sup>2<\/sup>). Sa localisation en bordure de la Cha\u00eene des Puy justifie cependant son \u00e9vocation.<\/p>\n<h2 id=\"ardente\">Nu\u00e9es ardentes<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-4 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-4 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-4 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-4 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-4' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/img3\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/img3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-4-1401\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-4-1401'>\n\t\t\t\tD\u00e9tail de la nu\u00e9e ardente montrant des cendres et des lapilli.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/nuee_detail\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/nuee_detail-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-4-1402\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-4-1402'>\n\t\t\t\tNu\u00e9e ardente (carri\u00e8re Rudel, versant sud du puy de D\u00f4me) constitu\u00e9e d&rsquo;\u00e9l\u00e9ments de taille variable (cendres \u00e0 blocs) mais de m\u00eame nature (trachyte).\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Projections associ\u00e9es \u00e0 un maar<\/h2>\n<p>Gour de Tazenat<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-5 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-5 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-5 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-5 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-5' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/tazenat\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/tazenat-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-5-1405\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-5-1405'>\n\t\t\t\tCrat\u00e8re du gour de Tazenat. Cet \u00e9difice volcanique est un maar.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar-detail\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar.detail-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-5-1404\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-5-1404'>\n\t\t\t\tLes projections sont de taille (des lapilli aux blocs) et de nature (basalte, rhyolite&#8230;) vari\u00e9es.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar_affleurement\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar_affleurement-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-5-1403\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-5-1403'>\n\t\t\t\tProjections volcaniques associ\u00e9es au maar. On observe des lits d&rsquo;\u00e9paisseur et de composition vari\u00e9es. Les lits pr\u00e9sentent une pente d&rsquo;environ 15 degr\u00e9s.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"vache\">Projections associ\u00e9es \u00e0 un c\u00f4ne strombolien<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-6 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-6 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-6 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-6 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-6' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-6-1406\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-6-1406'>\n\t\t\t\tD\u00e9tail de l&rsquo;affleurement montrant une bombe \u00ab\u00a0en fuseau\u00a0\u00bb (\u00e0 gauche) et des scories de la taille des lapilli et des blocs.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec3\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-6-1407\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-6-1407'>\n\t\t\t\tM\u00e9lange finement lit\u00e9 de scories et de laves massives (puy de la Vache). La couleur noire traduit une absence d&rsquo;oxydation des projections. En effet, elles sont retomb\u00e9es trop froides sur le sol pour \u00eatre ensuite oxyd\u00e9es au contact de l&rsquo;air.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec4\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec4-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-6-1408\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-6-1408'>\n\t\t\t\tD\u00e9tail de l&rsquo;affleurement montrant des lapilli de petite taille et quelques gros blocs \u00e9pars.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec1\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-6-1409\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-6-1409'>\n\t\t\t\tM\u00e9lange de projections volcaniques essentiellement compos\u00e9es de scories et de bombes (puy de la Vache). On observe un litage l\u00e9ger. La couleur rouge de ces projections r\u00e9sulte de l&rsquo;oxydation du fer qui y est contenu. Les scientifiques pensent que ce ph\u00e9nom\u00e8ne s&rsquo;est produit au contact de l&rsquo;air une fois que les bombes encore chaudes sont tomb\u00e9es sur le sol.\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h1><b>Types d&rsquo;\u00e9difices volcaniques<\/b><\/h1>\n<h2 id=\"maar\">Crat\u00e8res de maar<\/h2>\n<p>Gour de Tazenat<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-7 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-7 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-7 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-7 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-7' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/tazenat\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/tazenat-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-7-1405\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-7-1405'>\n\t\t\t\tCrat\u00e8re du gour de Tazenat. Cet \u00e9difice volcanique est un maar.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar-detail\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar.detail-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-7-1404\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-7-1404'>\n\t\t\t\tLes projections sont de taille (des lapilli aux blocs) et de nature (basalte, rhyolite&#8230;) vari\u00e9es.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar_affleurement\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar_affleurement-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-7-1403\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-7-1403'>\n\t\t\t\tProjections volcaniques associ\u00e9es au maar. On observe des lits d&rsquo;\u00e9paisseur et de composition vari\u00e9es. Les lits pr\u00e9sentent une pente d&rsquo;environ 15 degr\u00e9s.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"strombolien\">C\u00f4ne strombolien<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-8 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-8 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-8 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-8 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-8' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/cone\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/cone-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-8-1410\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-8-1410'>\n\t\t\t\tLe puy de C\u00f4me (\u00e0 gauche) et le Grand Suchet (\u00e0 droite) sont deux c\u00f4nes de scories basaltiques dont la forme est caract\u00e9ristique de l&rsquo;\u00e9difice volcanique type \u00ab\u00a0c\u00f4ne strombolien\u00a0\u00bb (vus du puy de D\u00f4me).\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"dome\">D\u00f4me<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-9 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-9 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-9 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-9 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-9' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/dome\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/dome-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-9-1411\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-9-1411'>\n\t\t\t\tPuy de D\u00f4me (vu du sud-est). Ce volcan correspond \u00e0 un d\u00f4me trachytique.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Protrusion<\/h2>\n<p>Le Puy Chopine<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-10 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-10 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-10 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-10 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-10' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/chopine\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/chopine-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-10-1412\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-10-1412'>\n\t\t\t\tLe puy Chopine (vu du sud-est) est une protrusion de trachyte.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h1><b>\u00c9difices\u00a0volcaniques de la\u00a0<\/b><b>Cha\u00eene des Puys<\/b><\/h1>\n<h2>Gour de Tazenat<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-11 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-11 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-11 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-11 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-11' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/tazenat\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/tazenat-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-11-1405\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-11-1405'>\n\t\t\t\tCrat\u00e8re du gour de Tazenat. Cet \u00e9difice volcanique est un maar.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar-detail\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar.detail-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-11-1404\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-11-1404'>\n\t\t\t\tLes projections sont de taille (des lapilli aux blocs) et de nature (basalte, rhyolite&#8230;) vari\u00e9es.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/maar_affleurement\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/maar_affleurement-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-11-1403\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-11-1403'>\n\t\t\t\tProjections volcaniques associ\u00e9es au maar. On observe des lits d&rsquo;\u00e9paisseur et de composition vari\u00e9es. Les lits pr\u00e9sentent une pente d&rsquo;environ 15 degr\u00e9s.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"goules\">Petit Sarcouy, Grand Sarcouy et Puy des Goules<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-12 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-12 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-12 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-12 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-12' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/sarcouy\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/sarcouy-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-12-1414\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-12-1414'>\n\t\t\t\tVus du nord-ouest, de gauche \u00e0 droite, le Petit Sarcouy (c\u00f4ne basaltique), le Grand Sarcouy (d\u00f4me trachytique) et le puy des Goules (c\u00f4ne basaltique).\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"beaunit\">Maar de Beaunit<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-13 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-13 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-13 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-13 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-13' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/beaunit_maar\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/beaunit_maar-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-13-1415\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-13-1415'>\n\t\t\t\tMaar de Beaunit. Le crat\u00e8re est combl\u00e9 par des projections volcaniques issues du puy Gonnard et par des s\u00e9diments lacustres (argiles) sur lesquels reposent des terrains mar\u00e9cageux. On peut localiser le parcours du ruisseau d&rsquo;Amb\u00e8ne qui traverse le maar. On pense actuellement que ce ruissseau a \u00e9t\u00e9 le pourvoyeur d&rsquo;eau \u00e0 l&rsquo;origine du phr\u00e9atomagmatisme de ce maar.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/beauni_projection\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/beauni_projection-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-13-1416\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-13-1416'>\n\t\t\t\tProjections phr\u00e9atomagmatiques issues du maar de Beaunit. On observe une superposition de lits compos\u00e9s d&rsquo;\u00e9l\u00e9ments de nature vari\u00e9e (lapilli basaltiques, blocs granitiques&#8230;).\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Puy Chopine<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-14 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-14 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-14 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-14 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-14' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/chopine\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/chopine-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-14-1412\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-14-1412'>\n\t\t\t\tLe puy Chopine (vu du sud-est) est une protrusion de trachyte.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Puy de C\u00f4me<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-15 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-15 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-15 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-15 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-15' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/come\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/come-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-15-1417\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-15-1417'>\n\t\t\t\tPuy de C\u00f4me (vu du nord). Les deux crat\u00e8res embo\u00eet\u00e9s ne sont pas visibles de cette vue.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Puy de D\u00f4me<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-16 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-16 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-16 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-16 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-16' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/dome\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/dome-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-16-1411\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-16-1411'>\n\t\t\t\tPuy de D\u00f4me (vu du sud-est). Ce volcan correspond \u00e0 un d\u00f4me trachytique.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"gonnard\">Puy Gonnard<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-17 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-17 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-17 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-17 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-17' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/gonnard\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/gonnard-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-17-1418\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-17-1418'>\n\t\t\t\tAccumulations de produits de projection issus du puy Gonnard. On y trouve des scories et des bombes volcaniques contenant de nombreuses enclaves.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Puy Pariou<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-18 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-18 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-18 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-18 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-18' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/pariou\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/pariou-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-18-1419\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-18-1419'>\n\t\t\t\tC\u00f4ne basaltique du puy Pariou (vu du nord-ouest).\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/pariou2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/pariou2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-18-1420\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-18-1420'>\n\t\t\t\tPuy Pariou au premier plan (vu depuis le puy de D\u00f4me au sud).\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Puy de la Vache<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-19 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-19 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-19 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-19 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-19' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-19-1406\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-19-1406'>\n\t\t\t\tD\u00e9tail de l&rsquo;affleurement montrant une bombe \u00ab\u00a0en fuseau\u00a0\u00bb (\u00e0 gauche) et des scories de la taille des lapilli et des blocs.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec3\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-19-1407\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-19-1407'>\n\t\t\t\tM\u00e9lange finement lit\u00e9 de scories et de laves massives (puy de la Vache). La couleur noire traduit une absence d&rsquo;oxydation des projections. En effet, elles sont retomb\u00e9es trop froides sur le sol pour \u00eatre ensuite oxyd\u00e9es au contact de l&rsquo;air.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec4\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec4-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-19-1408\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-19-1408'>\n\t\t\t\tD\u00e9tail de l&rsquo;affleurement montrant des lapilli de petite taille et quelques gros blocs \u00e9pars.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/projec1\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/projec1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-19-1409\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-19-1409'>\n\t\t\t\tM\u00e9lange de projections volcaniques essentiellement compos\u00e9es de scories et de bombes (puy de la Vache). On observe un litage l\u00e9ger. La couleur rouge de ces projections r\u00e9sulte de l&rsquo;oxydation du fer qui y est contenu. Les scientifiques pensent que ce ph\u00e9nom\u00e8ne s&rsquo;est produit au contact de l&rsquo;air une fois que les bombes encore chaudes sont tomb\u00e9es sur le sol.\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h1><b>Lacs de barrage<\/b> <b>de la<\/b> <b>Cha\u00eene des Puys<\/b><\/h1>\n<h2>Lac d&rsquo;Aydat<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-20 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-20 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-20 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-20 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-20' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/lac_aydat\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/lac_aydat-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-20-1421\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-20-1421'>\n\t\t\t\tLe lac d&rsquo;Aydat est un lac de barrage. La coul\u00e9e basaltique (cheire d&rsquo;Aydat au nord du lac) \u00e0 l&rsquo;origine de sa formation est visible en arri\u00e8re plan \u00e0 la limite de l&rsquo;eau. Plus en arri\u00e8re, elle est recouverte par la v\u00e9g\u00e9tation.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Lac de la Cassi\u00e8re<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-21 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-21 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-21 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-21 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-21' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/lac_cassiere\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/lac_cassiere-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-21-1422\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-21-1422'>\n\t\t\t\tLe lac de la Cassi\u00e8re est un lac de barrage. La coul\u00e9e basaltique (cheire d&rsquo;Aydat au sud par rapport au lac) \u00e0 l&rsquo;origine de sa formation est visible en arri\u00e8re plan \u00e0 la limite de l&rsquo;eau, recouverte de v\u00e9g\u00e9tation.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h1><b>Roches volcaniques<\/b><\/h1>\n<h2 id=\"basalte\">Basalte<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-22 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-22 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-22 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-22 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-22' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/basalte_oeilnu\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/basalte_oeilnu-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-22-1425\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-22-1425'>\n\t\t\t\tBasalte de la Cha\u00eene des Puys (longueur: 15 cm).\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/basalte_lpa\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/basalte_lpa-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-22-1424\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-22-1424'>\n\t\t\t\tBasalte au microscope polarisant en lumi\u00e8re polaris\u00e9e analys\u00e9e (LPA). Grossissement: x 40.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/basalte_lpna\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/basalte_lpna-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-22-1423\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-22-1423'>\n\t\t\t\tBasalte au microscope polarisant en lumi\u00e8re polaris\u00e9e non analys\u00e9e (LPNA). Grossissement: x 40.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"trachyan\">Trachyand\u00e9site<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-23 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-23 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-23 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-23 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-23' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyandesite_lpna\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyandesite_lpna-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-23-1428\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-23-1428'>\n\t\t\t\tTrachyand\u00e9site au microscope polarisant en lumi\u00e8re polaris\u00e9e non analys\u00e9e (LPNA).Grossissement: x100.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyandesite_oeilnu\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyandesite_oeilnu-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-23-1427\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-23-1427'>\n\t\t\t\tTrachyand\u00e9site de la Cha\u00eene des Puys  (longueur: 12 cm). Cette roche volcanique est encore nomm\u00e9e \u00ab\u00a0pierre de Volvic\u00a0\u00bb.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyandesite_lpa\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyandesite_lpa-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-23-1426\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-23-1426'>\n\t\t\t\tTrachyand\u00e9site au microscope polarisant en lumi\u00e8re polaris\u00e9e analys\u00e9e (LPA). Grossissement: x100. Les plages noires correspondent \u00e0 des bulles d&rsquo;air dans la roche.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2 id=\"trachyte\">Trachyte<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-24 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-24 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-24 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-24 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-24' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyte_oeilnu\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyte_oeilnu-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-24-1431\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-24-1431'>\n\t\t\t\tTrachyte du puy de D\u00f4me  (longueur: 11 cm).\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyte_lpa\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyte_lpa-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-24-1430\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-24-1430'>\n\t\t\t\tTrachyte au microscope polarisant en lumi\u00e8re polaris\u00e9e analys\u00e9e (LPA). Grossissement: x40.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/trachyte_lpna\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/trachyte_lpna-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-24-1429\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-24-1429'>\n\t\t\t\tTrachyte au microscope polarisant en lumi\u00e8re polaris\u00e9e non analys\u00e9e (LPNA).Grossissement: x40.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Enclaves trouv\u00e9es dans des roches volcaniques<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-25 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-25 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-25 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-25 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-25' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/granite\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/granite-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-25-1432\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-25-1432'>\n\t\t\t\tGranite\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/gabbro\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/gabbro-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-25-1433\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-25-1433'>\n\t\t\t\tGabbro\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/gneiss\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/gneiss-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-25-1434\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-25-1434'>\n\t\t\t\tGneiss\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/peridotite\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/peridotite-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-25-1435\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-25-1435'>\n\t\t\t\tP\u00e9ridotite\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h1>Min\u00e9raux<\/h1>\n<h2>Quelques min\u00e9raux des roches magmatiques de la cha\u00eene des Puys &#8211; Observ\u00e9s \u00e0 l\u2019\u0153il nu<\/h2>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-26 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-26 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-26 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-26 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-26' class='gallery galleryid-1385 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/mx1\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/mx1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-26-1438\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-26-1438'>\n\t\t\t\tGranite trouv\u00e9 dans la nappe de cendres et ponces de Rochefort-Montagne &#8211; F1 = Feldspath type 1 (probablement un feldspath alcalin)\nF2 = Feldspath type 2 (probablement un feldspath plagioclase compte tenu de la couleur verd\u00e2tre qui traduit souvent l&rsquo;alt\u00e9ration des feldspaths plagioclases)\nM = Mica noir = Biotite\nQ = Quartz\nEchelle: la largeur de la photo fait 2 cm.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/mx3\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/mx3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-26-1437\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-26-1437'>\n\t\t\t\tTrachyte du Puy de D\u00f4me &#8211; Les min\u00e9raux limpides ou blanch\u00e2tres, en forme de baguette et craquel\u00e9s sont des feldspaths alcalins (plus pr\u00e9cis\u00e9ment de la sanidine) et les min\u00e9raux noirs, des biotites (micas noirs).\nEchelle: la largeur de la photo fait 4 cm.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/mx2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/mx2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-26-1436\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-26-1436'>\n\t\t\t\tP\u00e9ridotite trouv\u00e9e en enclave dans une bombe volcanique du puy Gonnard &#8211; Les min\u00e9raux noirs sont des pyrox\u00e8nes et les min\u00e9raux verts, des olivines.\nEchelle: la largeur de la photo fait 1,5 cm.\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<h2>Classification simplifi\u00e9e des min\u00e9raux observ\u00e9s au microscope polarisant<\/h2>\n<table border=\"\u00bb1\u2033\" width=\"\u00bb450\u2033\" cellspacing=\"\u00bb0\u2033\" cellpadding=\"\u00bb0\u2033\">\n<tbody>\n<tr>\n<td colspan=\"3\">Min\u00e9raux essentiels<\/td>\n<td colspan=\"3\">Min\u00e9raux accessoires<\/td>\n<\/tr>\n<tr>\n<td>Lumi\u00e8re polaris\u00e9e non analys\u00e9e<\/td>\n<td>Lumi\u00e8re polaris\u00e9e analys\u00e9e<\/td>\n<td>Min\u00e9ral<\/td>\n<td>Lumi\u00e8re polaris\u00e9e non analys\u00e9e<\/td>\n<td>Lumi\u00e8re polaris\u00e9e analys\u00e9e<\/td>\n<td>Min\u00e9ral<\/td>\n<\/tr>\n<tr>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1439\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/quartz_lpna.jpg\" alt=\"quartz_lpna\" width=\"157\" height=\"118\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1440\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/quartz_lpa.jpg\" alt=\"quartz_lpa\" width=\"157\" height=\"118\" \/><\/td>\n<td>Quartz (x40)<\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1441\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/biotite_lpna.jpg\" alt=\"biotite_lpna\" width=\"157\" height=\"118\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1442\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/biotite_lpa.jpg\" alt=\"biotite_lpa\" width=\"157\" height=\"118\" \/><\/td>\n<td>Mica noir =Biotite (x100)<\/td>\n<\/tr>\n<tr>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1444\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/felpla_lpna.jpg\" alt=\"felpla_lpna\" width=\"157\" height=\"118\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1443\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/felpla_lpa.jpg\" alt=\"felpla_lpa\" width=\"157\" height=\"118\" \/><\/td>\n<td>Feldspath plagioclase (x100)<\/td>\n<td>En cours de construction<\/td>\n<td>En cours de construction<\/td>\n<td>Olivine (x100)<\/td>\n<\/tr>\n<tr>\n<td>En cours de construction<\/td>\n<td>En cours de construction<\/td>\n<td>Feldspath alcalin =Sanidine (x40)<\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1446\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/pyro_lpna.jpg\" alt=\"pyro_lpna\" width=\"157\" height=\"118\" \/><\/td>\n<td><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1445\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-content\/uploads\/sites\/4\/2016\/06\/pyro_lpa.jpg\" alt=\"pyro_lpa\" width=\"157\" height=\"118\" \/><\/td>\n<td>Pyrox\u00e8ne (x40)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<ul>\n<li><a href=\"http:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/volcanisme-dans-la-chaine-des-puy\/\"><strong>Pr\u00e9sentation<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/bloc-diagramme-de-la-chaine-des-puys\/\">Cha\u00eene des puys en 3D<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/enseigner\/bases-de-donnees-documentaires\/ressources-scientifiques-et-pedagogiques\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/carte-geologique-de-la-chaine-des-puys\/\">Cartes g\u00e9ologiques<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-classifications-diverses\/\">Classifications diverses<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-excursions\/\">Excursions<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-photographies\/\">Photographies<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/a-finir-lexique\/\">Lexique<\/a><\/li>\n<li><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/documentation\/\">Documentation<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Th\u00e8mes propos\u00e9s Nature de la cro\u00fbte continentale et du manteau Diff\u00e9renciation magmatique Diversit\u00e9 des \u00e9difices volcaniques Nature et diversit\u00e9 des \u00e9missions volcaniques Types d&rsquo;\u00e9missions volcaniques Bombes volcaniques Coul\u00e9es de lave Nappes de cendres et de ponces Cette nappe de cendres et de ponces ne provient pas d&rsquo;un \u00e9difice volcanique de la Cha\u00eene des Puys mais &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/ressources\/pedagogiques\/ressources-academiques-diverses\/thematique-la-planete-et-les-enjeux-contemporains\/volcanisme-dans-la-chaine-des-puy\/a-finir-photographies\/\">Lire la suite<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"parent":922,"menu_order":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1385","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/pages\/1385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/comments?post=1385"}],"version-history":[{"count":16,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/pages\/1385\/revisions"}],"predecessor-version":[{"id":1574,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/pages\/1385\/revisions\/1574"}],"up":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/pages\/922"}],"wp:attachment":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/svt\/wp-json\/wp\/v2\/media?parent=1385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}