{"id":6235,"date":"2025-03-22T11:22:14","date_gmt":"2025-03-22T11:22:14","guid":{"rendered":"https:\/\/nantes.apbg.org\/?p=6235"},"modified":"2025-09-23T08:21:57","modified_gmt":"2025-09-23T08:21:57","slug":"le-samedi-17-mai-2025-sortie-geologique-alterations-et-paysages-de-lest-vendeen","status":"publish","type":"post","link":"https:\/\/nantes.apbg.fr\/index.php\/2025\/03\/22\/le-samedi-17-mai-2025-sortie-geologique-alterations-et-paysages-de-lest-vendeen\/","title":{"rendered":"Le samedi 17 mai 2025 : Sortie g\u00e9ologique \u00ab Alt\u00e9rations et paysages de l\u2019Est vend\u00e9en \u00bb"},"content":{"rendered":"\n<figure class=\"wp-block-image alignright size-large is-resized\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6555\" style=\"width:449px;height:auto\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499699259_1583427192336969_8240905624229262617_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Le groupe ravi de cette magnifique journ\u00e9e. Merci Robert !<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Le comit\u00e9 de la r\u00e9gionale de Nantes de l&rsquo;APBG a organis\u00e9 une journ\u00e9e de terrain dans l&rsquo;est vend\u00e9en autour d&rsquo;un th\u00e8me g\u00e9n\u00e9ral : les pal\u00e9oalt\u00e9rations et leur lien avec les d\u00e9formations tectoniques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Une tr\u00e8s belle journ\u00e9e pass\u00e9e en compagnie de Robert Wyns entre les Mauges et l\u2019est vend\u00e9en. Nous avons compris comment des roches plutoniques (granites de Mortagne) ou m\u00e9tamorphiques (micaschistes des Mauges) peuvent former par leur alt\u00e9ration des profils lat\u00e9ritiques caract\u00e9ristiques. Au programme :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-small-font-size\">une matin\u00e9e pass\u00e9e, dans les Mauges, \u00e0 observer quelques \u00e9l\u00e9ments du profil lat\u00e9ritique \u00e9oc\u00e8ne dans les micaschistes dat\u00e9s du pr\u00e9cambrien : les alt\u00e9rites (silcr\u00e8tes et saprolites) et l\u2019horizon fissur\u00e9.<\/li>\n\n\n\n<li class=\"has-small-font-size\">un apr\u00e8s-midi, en Vend\u00e9e, \u00e0 la recherche des horizons fissur\u00e9s du granite de Mortagne et d\u2019une cuirasse ; le tout dat\u00e9 du cr\u00e9tac\u00e9 inf\u00e9rieur.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Ces alt\u00e9rations se forment toujours sous un climat chaud et humide suite \u00e0 la formation d&rsquo;un relief provoqu\u00e9 par un bombement de la lithosph\u00e8re continentale : bombement \u00e0 l&rsquo;\u00e9oc\u00e8ne li\u00e9 \u00e0 la formation de la cha\u00eene pyr\u00e9n\u00e9enne puis alpine et bombement li\u00e9 \u00e0 l&rsquo;ouverture du golfe de Gascogne au cr\u00e9tac\u00e9 inf\u00e9rieur.<br>Alors un grand merci \u00e0 Robert Wyns pour nous avoir montr\u00e9 tous ces affleurements alt\u00e9r\u00e9s que nous ne qualifierons plus jamais de \u00ab\u00a0pourris\u00a0\u00bb. Et vive les alt\u00e9rations soustractive et additive !<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6547\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6547\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499143622_1583427445670277_3225171624954334380_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Le groupe au niveau de Les Thermelli\u00e8res face \u00e0 une source ferrugineuse ?<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6548\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6548\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227503_1583427042336984_8940636768781530615_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">S\u00e9diments \u00e9oc\u00e8nes gr\u00e9sifi\u00e9s en silcr\u00e8tes : grains de quartz isol\u00e9s dans une matrice argileuse gris\u00e2tre silicifi\u00e9e<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6549\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6549\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499227506_1583427365670285_9085534299534323298_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">La Grande Brosse : ancienne carri\u00e8re de dalles de granite.. Le d\u00e9bit en dalles est d\u00fb \u00e0 des fissures horizontales d&rsquo;alt\u00e9ration plus resserr\u00e9es qu&rsquo;\u00e0 Malli\u00e8vre car on est au sommet de l&rsquo;orizon fissur\u00e9.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6550\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6550\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499243636_1583427165670305_5151538832756450030_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">ancienne mine de fer o\u00f9 \u00e9tait exploit\u00e9e une cuirasse ferrugineuse. Cuirasse ferrugineuse correspondant \u00e0 la partie sommitale du profil lat\u00e9ritique d&rsquo;\u00e2ge probablement \u00e9oc\u00e8ne. Une cuirasse se forme par recristallisation, en saison s\u00e8che, des hydroxydes de fer (goethite de teinte ocre).<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499244915_1583427009003654_7790223454468226618_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"591\" height=\"280\" data-id=\"6551\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499244915_1583427009003654_7790223454468226618_n.jpg\" alt=\"\" class=\"wp-image-6551\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499244915_1583427009003654_7790223454468226618_n.jpg 591w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499244915_1583427009003654_7790223454468226618_n-300x142.jpg 300w\" sizes=\"auto, (max-width: 591px) 100vw, 591px\" \/><\/a><figcaption class=\"wp-element-caption\">Au bois de la Po\u00ebze o\u00f9 a \u00e9t\u00e9 r\u00e9alis\u00e9 un carottage de 40m de profondeur, jusqu&rsquo;aux micaschistes fractur\u00e9s<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6552\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6552\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499256686_1583427099003645_7436880344389350138_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Depuis le Mont des Alouettes (227 m d&rsquo;altitude), vue sur le bassin de Chantonnay (surface d&rsquo;alt\u00e9ration \u00e9oc\u00e8ne) et l&rsquo;escarpement de la faille normale de Chantonnay (en arri\u00e8re plan)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"485\" data-id=\"6553\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-1024x485.jpg\" alt=\"\" class=\"wp-image-6553\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-1024x485.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-300x142.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-768x363.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-1536x727.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499425877_1583426882337000_6690970925418940991_n-2048x969.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6554\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6554\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499523545_1583427149003640_3419826995096665350_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Une diaclase horizontale et des feldspaths potassiques verticaux affect\u00e9s par des fentes de tension horizontales li\u00e9es \u00e0 l&rsquo;alt\u00e9ration<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"485\" data-id=\"6556\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-1024x485.jpg\" alt=\"\" class=\"wp-image-6556\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-1024x485.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-300x142.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-768x363.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-1536x727.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860193_1583426899003665_8915328177490686211_n-2048x969.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Saprolite des Mauges, la base des alt\u00e9rites des micaschistes pr\u00e9cambriens. Le volume, la structure, la foliation de la roche \u00e9tant conserv\u00e9s, on parle d&rsquo;isalt\u00e9rite.Elle se coupe au couteau ! Foliation bien reconnaissable<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6557\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6557\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n-1536x864.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499860739_1583427295670292_4871490974952266362_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Horizon fissur\u00e9 dans des micaschistes pr\u00e9cambriens \u00e0 la Poitevini\u00e8re<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"461\" data-id=\"6558\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-1024x461.jpg\" alt=\"\" class=\"wp-image-6558\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-1024x461.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-300x135.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-768x346.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-1536x692.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499861531_1583426839003671_2859694389270129627_n-2048x922.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Horizon fissur\u00e9 dans le granite de Mortagne \u00e0 Malli\u00e8vre. La classe en plein air pour comprendre les m\u00e9canismes de l&rsquo;alt\u00e9ration \u00e0 l&rsquo;origine des diaclases horizontales<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"485\" data-id=\"6561\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-1024x485.jpg\" alt=\"\" class=\"wp-image-6561\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-1024x485.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-300x142.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-768x363.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-1536x727.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/499915019_1583426922336996_793478459621850648_n-2048x969.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">H\u00e9matite, oxyde de fer Fe2O3, de couleur rouge brique, qui peut contenir jusqu&rsquo;\u00e0 65% de fer m\u00e9tal<\/figcaption><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Le comit\u00e9 de la r\u00e9gionale de Nantes de l&rsquo;APBG a organis\u00e9 une journ\u00e9e de terrain dans l&rsquo;est vend\u00e9en autour d&rsquo;un<\/p>\n","protected":false},"author":1,"featured_media":6558,"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":[10,11],"tags":[],"class_list":["post-6235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sortie","category-terrain"],"_links":{"self":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/comments?post=6235"}],"version-history":[{"count":2,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6235\/revisions"}],"predecessor-version":[{"id":6564,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6235\/revisions\/6564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/media\/6558"}],"wp:attachment":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/media?parent=6235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/categories?post=6235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/tags?post=6235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}