{"id":685,"date":"2025-05-01T14:26:54","date_gmt":"2025-05-01T14:26:54","guid":{"rendered":"https:\/\/strasbourg.apbg.org\/?p=685"},"modified":"2026-02-03T10:23:15","modified_gmt":"2026-02-03T09:23:15","slug":"samedi-14-juin-2025-a-la-decouverte-de-la-geologie-du-sundgau-et-du-jura-alsacien","status":"publish","type":"post","link":"https:\/\/strasbourg.apbg.fr\/?p=685","title":{"rendered":"Samedi 14 juin 2025\u00a0: \u00c0 la d\u00e9couverte de la g\u00e9ologie du Sundgau et du Jura alsacien"},"content":{"rendered":"\n<p>L\u2019APBG vous propose de d\u00e9couvrir la tr\u00e8s riche histoire g\u00e9ologique du <strong>Sundgau et du Jura alsacien <\/strong>le <strong>samedi 14 juin 2025<\/strong>, gr\u00e2ce \u00e0 la visite de sites exceptionnels comme la carri\u00e8re de la cimenterie d\u2019Altkirch ou les environs de Ferrette. Cette sortie permettra de retracer 170 millions d\u2019ann\u00e9es d\u2019histoire, de la formation des r\u00e9cifs de coraux de Ferrette, jusqu\u2019\u00e0 la naissance du lac sal\u00e9 du Foss\u00e9 rh\u00e9nan et \u00e0 la tectonique du Jura.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><a href=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"921\" height=\"1024\" src=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette-921x1024.jpg\" alt=\"\" class=\"wp-image-115\" srcset=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette-921x1024.jpg 921w, https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette-270x300.jpg 270w, https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette-768x854.jpg 768w, https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/sortie_Ferrette.jpg 1012w\" sizes=\"auto, (max-width: 921px) 100vw, 921px\" \/><\/a><\/figure>\n\n\n\n<p>Au programme de la journ\u00e9e :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Visite de la carri\u00e8re d\u2019Altkirch o\u00f9 nous pourrons voir des <strong>stromatolithes<\/strong>, des <strong>fossiles d\u2019arthropodes<\/strong>, des d\u00e9p\u00f4ts ayant enregistr\u00e9 les <strong>saisons du pass\u00e9 <\/strong>et des <strong>\u00e9vaporites lacustres <\/strong>de l\u2019Oligoc\u00e8ne ;<\/li>\n\n\n\n<li>D\u00e9couverte des <strong>r\u00e9cifs de coraux <\/strong>fossiles de Ferrette et de la <strong>s\u00e9dimentation dans une mer tropicale <\/strong>du Jurassique. D\u00e9couverte des organismes ayant peupl\u00e9 ces mers (avec un peu de chance nous pourrons observer des fragments de fossiles de coraux, d\u2019oursins, de brachiopodes, de lamellibranches et de crino\u00efdes). ;<\/li>\n\n\n\n<li>Compr\u00e9hension de la <strong>tectonique du Jura alsacien <\/strong>(plis et chevauchement de Ferrette, front de la zone de d\u00e9formation alpine encore active actuellement) ;<\/li>\n\n\n\n<li>Identification des traces du <strong>permafrost alsacien <\/strong>remontant au Dernier maximum glaciaire (20&nbsp;000 ans).<\/li>\n\n\n\n<li>Synth\u00e8se des observations de la journ\u00e9e et <strong>reconstitution de l\u2019histoire g\u00e9ologique <\/strong>du Jurassique \u00e0 nos jours.<\/li>\n<\/ul>\n\n\n\n<p>Aspects pratiques :<\/p>\n\n\n\n<p>Le rendez-vous est fix\u00e9 le samedi 14 juin 2025 \u00e0 <strong>8h45<\/strong>, rue des carri\u00e8res, face \u00e0 l\u2019entr\u00e9e de la carri\u00e8re de la cimenterie Holcim de Altkirch (point exact disponible sur ce lien : <a href=\"https:\/\/maps.app.goo.gl\/9Bhq7AZ9pqa7uRNV9\">https:\/\/maps.app.goo.gl\/9Bhq7AZ9pqa7uRNV9<\/a> ).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/consignes.png\"><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"205\" src=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/consignes.png\" alt=\"\" class=\"wp-image-49\" srcset=\"https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/consignes.png 605w, https:\/\/strasbourg.apbg.fr\/wp-content\/uploads\/2026\/01\/consignes-300x102.png 300w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><\/a><\/figure>\n\n\n\n<p>La fin de la journ\u00e9e est pr\u00e9vue pour <strong>17h30<\/strong>.<\/p>\n\n\n\n<p>Le <strong>repas de midi sera tir\u00e9 du sac<\/strong>, pensez \u00e0 pr\u00e9voir des <strong>v\u00eatements adapt\u00e9s \u00e0 la m\u00e9t\u00e9o <\/strong>(il n\u2019y a pas d\u2019abris en cas de pluie) et de l\u2019eau car il peut d\u00e9j\u00e0 faire chaud \u00e0 cette p\u00e9riode de l\u2019ann\u00e9e.<\/p>\n\n\n\n<p>Au plaisir de vous retrouver sur le terrain ! Quentin Boesch<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Pour pouvoir participer aux sorties vous devez \u00eatre<a href=\"https:\/\/strasbourg.apbg.fr\/qui-sommes-nous\/adhesion-abonnement\/\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;membres de l\u2019APBG<\/a><\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Inscription obligatoire: <\/strong><a href=\"https:\/\/docs.google.com\/spreadsheets\/d\/1-78NV75N2Znuc-QEwtZQFJbd0K-XYaUUp8mqWfmm2-Q\/edit?usp=sharing\">https:\/\/docs.google.com\/spreadsheets\/d\/1-78NV75N2Znuc-QEwtZQFJbd0K-XYaUUp8mqWfmm2-Q\/edit?usp=sharing<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019APBG vous propose de d\u00e9couvrir la tr\u00e8s riche histoire g\u00e9ologique du Sundgau et du Jura alsacien le samedi 14 juin<\/p>\n","protected":false},"author":1,"featured_media":686,"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":[2,7],"tags":[],"class_list":["post-685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activites","category-sortie"],"_links":{"self":[{"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=685"}],"version-history":[{"count":1,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/685\/revisions"}],"predecessor-version":[{"id":787,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/685\/revisions\/787"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/strasbourg.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}