{"id":411,"date":"2015-08-11T10:49:11","date_gmt":"2015-08-11T10:49:11","guid":{"rendered":"http:\/\/dijon.apbg.org\/?p=411"},"modified":"2026-02-10T09:59:40","modified_gmt":"2026-02-10T08:59:40","slug":"sortie-recif-corallien-de-lyonne-et-grottes-darcy-sur-cure","status":"publish","type":"post","link":"https:\/\/dijon.apbg.fr\/index.php\/2015\/08\/11\/sortie-recif-corallien-de-lyonne-et-grottes-darcy-sur-cure\/","title":{"rendered":"Sortie R\u00e9cif corallien de l&rsquo;Yonne et grottes d&rsquo;Arcy sur Cure"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\"><strong><span style=\"text-decoration: underline\">Week-end des 6 et 7 juin 2015<\/span><\/strong><\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Weekend&nbsp; organis\u00e9 par Jacqueline Bertron (enseignante svt) pour 22 adh\u00e9rents :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Samedi matin, visite des grottes d\u2019Arcy sur Cure en pr\u00e9sence de Michel Girard (CNRS),&nbsp; sentier des grottes, carri\u00e8re des sarcophages ; apr\u00e8s-midi,&nbsp; visite guid\u00e9e de la Basilique&nbsp; de V\u00e9zelay.<\/li>\n\n\n\n<li>Dimanche, d\u00e9couverte du r\u00e9cif corallien et de la botanique de la r\u00e9serve naturelle.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les grottes d\u2019Arcy constituent un ensemble de 11 cavit\u00e9s creus\u00e9es par la Cure dans le calcaire corallien, entre Auxerre et Avallon, dans l\u2019Yonne ; elles ont \u00e9t\u00e9 fr\u00e9quent\u00e9es par l\u2019Homme depuis pr\u00e8s de 200 000 ans ; ont \u00e9t\u00e9 d\u00e9couverts des ossements, des silex taill\u00e9s, des parures, des peintures, gravures,\u2026La Grande Grotte, seule ouverte \u00e0 la visite, est la plus ancienne grotte orn\u00e9e du monde apr\u00e8s la grotte de Chauvet ; ses peintures pari\u00e9tales, de couleur rouge majoritairement, se r\u00e9partissent sur plus de 140 unit\u00e9s graphiques dont une soixantaine d\u2019animaux (mammouths, ours, rhinoc\u00e9ros, f\u00e9lins, oiseaux,\u2026) . On y trouve \u00e9galement des empreintes de huit mains n\u00e9gatives et des signes vari\u00e9s. Les datations au carbone 14, obtenues sur des restes charbonneux s\u2019\u00e9tagent entre 28.000 et 33.000 ans av.JC.<br>\nLa r\u00e9serve naturelle nationale Bois du Parc : pelouse s\u00e8che, ch\u00eanaie\/charmaie et r\u00e9cif corallien : il y a 150 millions d\u2019ann\u00e9es, dans une mer chaude et peu profonde, un massif corallien s\u2019est d\u00e9velopp\u00e9, sa construction a dur\u00e9 de 4 \u00e0 5 millions d\u2019ann\u00e9es. Le colmatage de cet \u00e9difice et la s\u00e9dimentation post\u00e9rieure ont abouti \u00e0 la formation d\u2019une roche calcaire dure et compacte. Gr\u00e2ce \u00e0 l\u2019\u00e9rosion par l\u2019Yonne et aux extractions humaines, qui ont d\u00e9gag\u00e9 cette roche, il est possible de voir des colonies de polypiers (coraux fossilis\u00e9s) en position de vie.<br>\n<a class=\"moz-txt-link-freetext\" href=\"http:\/\/www.cen-bourgogne.fr\/images\/stories\/CSNB\/documents\/decouvrir\/reserves_naturelles_nationales\/depliant_bdp_2012.pdf\">http:\/\/www.cen-bourgogne.fr\/images\/stories\/CSNB\/documents\/decouvrir\/reserves_naturelles_nationales\/depliant_bdp_2012.pdf<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image alignright size-large is-resized\"><a href=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-683x1024.jpg\" alt=\"\" class=\"wp-image-113\" style=\"aspect-ratio:0.6669831667265235;width:222px;height:auto\" srcset=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-683x1024.jpg 683w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-200x300.jpg 200w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-768x1152.jpg 768w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-1024x1536.jpg 1024w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-1365x2048.jpg 1365w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/recif-corallien-Yonne5-scaled.jpg 1707w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/a><figcaption class=\"wp-element-caption\">D\u00e9tail du r\u00e9cif corallien<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image alignright size-large is-resized\"><a href=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum-1024x682.jpg\" alt=\"\" class=\"wp-image-89\" style=\"aspect-ratio:1.501364856315733;width:332px;height:auto\" srcset=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum-1024x682.jpg 1024w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum-300x200.jpg 300w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum-768x512.jpg 768w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum-1536x1024.jpg 1536w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Le-groupe-entourant-un-exemplaire-du-recif-corallien-Calamophylliopsis-flabellum.jpg 1772w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Le groupe entourant un exemplaire du r\u00e9cif corallien (Calamophylliopsis flabellum)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><a href=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"767\" src=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte-1024x767.jpg\" alt=\"\" class=\"wp-image-96\" style=\"aspect-ratio:1.3350285818551564;width:254px;height:auto\" srcset=\"https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte-1024x767.jpg 1024w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte-300x225.jpg 300w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte-768x575.jpg 768w, https:\/\/dijon.apbg.fr\/wp-content\/uploads\/2026\/02\/Mammouths-Grande-grotte.jpg 1531w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Mammouths Grande grotte<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Week-end des 6 et 7 juin 2015 Weekend&nbsp; organis\u00e9 par Jacqueline Bertron (enseignante svt) pour 22 adh\u00e9rents : Les grottes<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[6],"tags":[],"class_list":["post-411","post","type-post","status-publish","format-standard","hentry","category-sortie"],"_links":{"self":[{"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/comments?post=411"}],"version-history":[{"count":2,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/411\/revisions"}],"predecessor-version":[{"id":1028,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/411\/revisions\/1028"}],"wp:attachment":[{"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/media?parent=411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/categories?post=411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dijon.apbg.fr\/index.php\/wp-json\/wp\/v2\/tags?post=411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}