{"id":7109,"date":"2026-08-30T14:44:38","date_gmt":"2026-08-30T14:44:38","guid":{"rendered":"https:\/\/www.lejardin-auxnympheas.com\/?post_type=product&p=7109"},"modified":"2026-08-30T15:26:32","modified_gmt":"2026-08-30T15:26:32","slug":"bois-fossile","status":"publish","type":"product","link":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/produit\/bois-fossile\/","title":{"rendered":"bois fossile 15\/20cm"},"content":{"rendered":"
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je vous propose l\u00e0 des bois silicifi\u00e9s ou bois fossiles, destin\u00e9s aux d\u00e9cors d’aquarium<\/div>\n
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morceaux de 15 \u00e0 20 cm (0,5 \u00e0 1kg) (ils sont num\u00e9rot\u00e9, donc si vous etes interess\u00e9 il suffit de joindre un message \u00e0 votre commande avec le num\u00e9ro du morceau que vous voulez)<\/div>\n
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collect\u00e9 sur un de mes terrains (je suis en agriculture biologique depuis 24 ans, donc aucune inqui\u00e9tude pour vos poissons, ils sont propres)<\/div>\n
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je vous conseil n\u00e9anmoins de les faire bouillir 10mn avant de les instal\u00e9s<\/div>\n
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voici le contexte de leur d\u00e9couverte:<\/div>\n
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\u00c0 Saint-Barth\u00e9lemy-de-Vals (Dr\u00f4me), les formations g\u00e9ologiques locales comportent des couches de molasse du Mioc\u00e8ne qui peuvent \u00eatre fossilif\u00e8res (contenant des hu\u00eetres, des bivalves, des oursins ou des dents de requins\/raies)<\/span>, ainsi que des gr\u00e8s \u00e9oc\u00e8nes notables au site des \u00ab Roches qui dansent \u00bb au quartier de Douevas<\/div>\n
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Le secteur de <\/span>Serves-sur-Rh\u00f4ne<\/strong> (Dr\u00f4me) et ses communes limitrophes (comme \u00c9r\u00f4me) est un secteur bien connu des g\u00e9ologues et amateurs de min\u00e9ralogie pour ses gisements de bois fossiles (silicifi\u00e9s)<\/strong>.<\/div>\n
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Origine et Contexte G\u00e9ologique<\/div>\n
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Les morceaux de bois p\u00e9trifi\u00e9 que l’on trouve dans cette zone du Nord-Dr\u00f4me datent g\u00e9n\u00e9ralement de l’\u00e8re Tertiaire (Mioc\u00e8ne\/Plioc\u00e8ne). Ils proviennent de for\u00eats anciennes emport\u00e9es ou recouvertes par des s\u00e9diments fluviatiles ou des d\u00e9p\u00f4ts li\u00e9s \u00e0 l’activit\u00e9 volcanique du Massif Central tout proche. Au fil des mill\u00e9naires, la mati\u00e8re organique de ces arbres a \u00e9t\u00e9 enti\u00e8rement remplac\u00e9e par de la silice (ph\u00e9nom\u00e8ne de silicification), transformant les troncs et branches en v\u00e9ritable roche (quartz, agate) tout en pr\u00e9servant la structure des cernes et des fibres de croissance.\u00a0<\/div>\n<\/div>\n
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O\u00f9 les trouve-t-on ?<\/div>\n<\/div>\n
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  • Dans les vignobles et vergers :<\/strong> L’\u00e9rosion et les travaux agricoles (vignes des C\u00f4tes-du-Rh\u00f4ne, vergers de terrasses) font r\u00e9guli\u00e8rement remonter des fragments de bois fossile \u00e0 la surface du sol.<\/span><\/li>\n<\/ul>\n<\/div>\n
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    • Dans les ravines et lits de ruisseaux :<\/strong> Les fortes pluies lessivent les pentes et mettent \u00e0 nu des morceaux de couleur brune, rousse ou beige, \u00e0 l’aspect de bois mais tr\u00e8s lourds et durs comme de la pierre.<\/span><\/li>\n<\/ul>\n<\/div>\n
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      • Chantiers et terrassements :<\/strong> Les excavations locales recoupent parfois les couches de sables et de graviers anciens o\u00f9 ces fossiles sont pi\u00e9g\u00e9s.<\/span><\/li>\n<\/ul>\n<\/div>\n
          <\/ul>\n
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          Conseils pour la recherche (R\u00e9glementation)<\/div>\n<\/div>\n
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          Si vous cherchez \u00e0 prospecter dans la r\u00e9gion :<\/div>\n<\/div>\n
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          • Propri\u00e9t\u00e9s priv\u00e9es :<\/strong> La grande majorit\u00e9 des terrains (notamment les vignes) sont priv\u00e9s. Il est imp\u00e9ratif d’obtenir l’accord des propri\u00e9taires avant de ramasser quoi que ce soit.<\/span><\/li>\n<\/ul>\n<\/div>\n
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            • S\u00e9curit\u00e9 :<\/strong> \u00c9vitez les fronts de taille instables ou les bords de routes circul\u00e9es le long de la vall\u00e9e du Rh\u00f4ne.<\/span><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

              je vous propose l\u00e0 des bois silicifi\u00e9s ou bois fossiles, destin\u00e9s aux d\u00e9cors d’aquarium morceaux de 15 \u00e0 20 cm […]<\/p>\n","protected":false},"featured_media":7116,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[73],"product_tag":[25],"class_list":["post-7109","product","type-product","status-publish","has-post-thumbnail","product_cat-decors-daquarium","product_tag-materiaux","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","purchasable","product-type-simple"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product\/7109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/comments?post=7109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/media\/7116"}],"wp:attachment":[{"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/media?parent=7109"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=7109"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=7109"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.lejardin-auxnympheas.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=7109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}