{"id":297,"date":"2026-10-15T10:47:21","date_gmt":"2026-10-15T08:47:21","guid":{"rendered":"https:\/\/argonne.jlfrance.fr\/?p=297"},"modified":"2026-10-26T10:52:00","modified_gmt":"2026-10-26T09:52:00","slug":"la-craie-et-les-marnes-en-argonne","status":"publish","type":"post","link":"https:\/\/argonne.jlfrance.fr\/?p=297","title":{"rendered":"La craie et les marnes en Argonne"},"content":{"rendered":"<nav style=\"--separator: &quot;\/&quot;\" class=\"wp-block-breadcrumbs\" aria-label=\"Fil d\u2019Ariane\"><ol><li><a href=\"https:\/\/argonne.jlfrance.fr\/\">Accueil<\/a><\/li><li><a href=\"https:\/\/argonne.jlfrance.fr\/?cat=16\">patrimoine naturel<\/a><\/li><li><a href=\"https:\/\/argonne.jlfrance.fr\/?cat=17\">g\u00e9ologie<\/a><\/li><li><span aria-current=\"page\">La craie et les marnes en Argonne<\/span><\/li><\/ol><\/nav>\n\n\n<h3 class=\"wp-block-heading\">Craie et marnes sur l&rsquo;\u00e9chelle g\u00e9ologique<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ceux sont des formations g\u00e9ologiques issues du Cr\u00e9tac\u00e9 sup\u00e9rieur du d\u00e9but du C\u00e9nomanien. Concernant d&rsquo;autres craies et marnes, leur formation date du Turonien pour la craie de Rethel, puis le Turonien et Coniacien, pour la craie de Ch\u00e2lons, soit une p\u00e9riode de 99,6 \u00e0 85.8 millions d&rsquo;ann\u00e9es.<br>Le C\u00e9nomanien doit son nom \u00e0 la stratotype (r\u00e9gion-type) de la r\u00e9gion du Mans et fait r\u00e9f\u00e9rence \u00e9galement au peuple gaulois des c\u00e9nomans.\u00a0Quant au Turonien, il s&rsquo;agit de la stratotype de la r\u00e9gion de Tours, le Coniacien \u00e0 celle de Cognac.<br>Le latin \u00ab\u00a0creta\u00a0\u00bb d\u00e9note diff\u00e9rentes terres, sols et roches. Leur point commun est la blancheur<sup>1<\/sup> donnant ainsi son nom \u00e0 le p\u00e9riode g\u00e9ologique du Cr\u00e9tac\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L&rsquo;origine de la craie et des marnes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La craie se forme en milieu marin avec des squelettes de micro-organismes, essentiellement des coccolithes. Les coccolithes&nbsp;sont des plaques de carbonate de calcium prot\u00e9geant les coccolithophores, des&nbsp;algues planctoniques. Le \u00ab\u00a0ciment\u00a0\u00bb de cette roche est la calcite.&nbsp;La craie est une roche tendre, poreuse et friable.&nbsp;Dans la craie nous trouvons des marcassites (disulfite de fer).&nbsp;<br>La marne contient un certain pourcentage d&rsquo;argile (craie marneuse), cas des couches inf\u00e9rieures des C\u00f4tes de Champagne.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Localisation de la craie et des marnes en Argonne<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La craie et les marnes affleurent tout au long de la bordure ouest de l&rsquo;Argonne et forment la r\u00e9gion naturelle de la Champagne crayeuse, \u00e9galement appel\u00e9 \u00ab\u00a0s\u00e8che\u00a0\u00bb ou en certains endroits \u00ab\u00a0pouilleuse\u00a0\u00bb<sup>2<\/sup>. Ceux-sont les principales composantes g\u00e9ologiques des C\u00f4tes de Champagne, du&nbsp;Vallage et des versants de&nbsp;la vall\u00e9e de la Tourbe.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Le site de la main de Massiges<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Avec sa carri\u00e8re et&nbsp;ses points dominants, c&rsquo;est un lieu propice pour comprendre, pour \u00e9tudier et pour expliquer une partie de la formation g\u00e9ologique du bassin parisien et de l&rsquo;Argonne.<\/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-container-core-gallery-is-layout-f628fc7d wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-scaled.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"495\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-500x334.jpg\" alt=\"\" class=\"wp-image-495\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-scaled.jpg\"><img decoding=\"async\" width=\"500\" height=\"334\" data-id=\"496\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-500x334.jpg\" alt=\"\" class=\"wp-image-496\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">La Main de Massiges<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Durant la Guerre 14-18, le site de la Main de Massiges est le th\u00e9\u00e2tre de violents combats o\u00f9 l&rsquo;utilisation des mines fait des ravages.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-container-core-gallery-is-layout-f628fc7d wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"500\" height=\"334\" data-id=\"518\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-500x334.jpg\" alt=\"\" class=\"wp-image-518\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-5-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"517\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-500x334.jpg\" alt=\"\" class=\"wp-image-517\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-6-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>La carri\u00e8re du Haut des Monts<\/strong>, \u00e0 la limite de plusieurs types de craie et de marnes crayeuses.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-container-core-gallery-is-layout-45eff11f wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"519\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-500x334.jpg\" alt=\"\" class=\"wp-image-519\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-7-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"520\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-500x334.jpg\" alt=\"\" class=\"wp-image-520\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-8-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"522\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-500x334.jpg\" alt=\"\" class=\"wp-image-522\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-9-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"521\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-500x334.jpg\" alt=\"\" class=\"wp-image-521\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-10-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">La craie et ses paysages<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En moins de 2 km, ce chemin descendant paisiblement\u00a0de la Main de Massiges pour s&rsquo;approcher\u00a0de Ville-sur-Tourbe\u00a0se situe sur des strates g\u00e9ologiques diff\u00e9rentes : <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Craie de Ch\u00e2lons\u00a0(c3Ci &#8211;\u00a0Turonien &#8211; Coniacien Moyen), <\/li>\n\n\n\n<li>Craie de Rethel (c2R &#8211;\u00a0Turonien sup\u00e9rieur), <\/li>\n\n\n\n<li>Marnes crayeuses (c2 &#8211;\u00a0Turonien inf\u00e9rieur et moyen), <\/li>\n\n\n\n<li>Marnes et craies (c1 &#8211;\u00a0C\u00e9nomanien moyen et sup\u00e9rieur),\u00a0<\/li>\n\n\n\n<li>Sables verts sup\u00e9rieurs (c1Sv &#8211;\u00a0C\u00e9nomanien inf\u00e9rieur) <\/li>\n\n\n\n<li>Et en traversant la D982, nous atteignons au bois de Ville, la couche de gaize.\u00a0<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-500x334.jpg\" alt=\"\" class=\"wp-image-511\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<ul class=\"wp-block-list\"><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">En bordure de la vall\u00e9e de l&rsquo;Aisne entre Cernay-en-Dormois et Sechault, nous sommes  \u00e0 la  rupture de pente des Monts de Champagne. En face, le Mont Cuvelet est un mamelon de marne crayeuse.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-container-core-gallery-is-layout-f628fc7d wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"514\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-500x334.jpg\" alt=\"\" class=\"wp-image-514\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-2-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"515\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-500x334.jpg\" alt=\"\" class=\"wp-image-515\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-3-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><figcaption class=\"wp-element-caption\">Le Mont Cuvelet<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h6 class=\"wp-block-heading\">Marne et gr\u00e8ze crayeuse<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Entre Court\u00e9mont et Les Cruzys, un front de marne crayeuse, appel\u00e9e \u00e9galement di\u00e8ve.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"333\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-500x333.jpg\" alt=\"\" class=\"wp-image-523\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-500x333.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-768x512.jpg 768w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-1536x1024.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-11-2048x1365.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vu du Moulin de Valmy apparait le doux relief de gr\u00e8ze crayeuse (ou gr\u00e8ve). La gr\u00e8ze est un sol plus ou moins remani\u00e9 sur la craie (infoterre.brgm.fr). \u00ab\u00a0Comme l&rsquo;a fort bien montr\u00e9 Tricart (1952), les gr\u00e8zes crayeuses jouent un r\u00f4le essentiel dans l&rsquo;adoucissement des versants : au fur et \u00e0 mesure qu&rsquo;elles se forment en sommet de pente et s&rsquo;accumulent dans les d\u00e9pressions, les interfluves se r\u00e9tr\u00e9cissent et les vallons se comblent (cryoplanation).\u00a0\u00bb<sup>3<\/sup><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"333\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-500x333.jpg\" alt=\"\" class=\"wp-image-516\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-500x333.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-4-2048x1366.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le manque de terre v\u00e9g\u00e9tale et les difficult\u00e9s \u00e0 cultiver ces terres restent longtemps une r\u00e9gion pauvre, d&rsquo;o\u00f9 parfois cette confusion du terme Champagne \u00ab\u00a0pouilleuse\u00a0\u00bb, mais\u00a0doit ce vocable au thym faux pouliot\u00a0(<em>Thymus pulegioides<\/em>)\u00a0colonisant le savart. Le savart est une zone d\u00e9sertique dont nous pouvons avoir un aper\u00e7u en longeant le camp militaire de Suippes ou comme lors de la visite autoris\u00e9e en 2011 des villages d\u00e9truits.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"336\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-500x336.jpg\" alt=\"\" class=\"wp-image-524\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-500x336.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-767x515.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-300x201.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-1536x1031.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-et-marnes-12-2048x1375.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Les nodules<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dans la craie, il n&rsquo;est pas rare de trouver des nodules. Je me garde d&#8217;employer les termes  nodule de pyrite ou marcasite tant le d\u00e9bat est clivant. Il semble tout de m\u00eame que bien qu&#8217;employait localement, le terme marcasite soit impropre.  Nous trouvons \u00e9galement, l&#8217;emploi de l&rsquo;expression \u00ab\u00a0pierre \u00e0 tonnerre\u00a0\u00bb.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-5 is-layout-flex wp-container-core-gallery-is-layout-45eff11f wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"510\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-500x334.jpg\" alt=\"\" class=\"wp-image-510\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"507\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-500x334.jpg\" alt=\"\" class=\"wp-image-507\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-3-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"506\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-500x334.jpg\" alt=\"\" class=\"wp-image-506\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-2048x1367.jpg 2048w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-4-300x200.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"508\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-500x334.jpg\" alt=\"\" class=\"wp-image-508\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-5-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" data-id=\"509\" src=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-500x334.jpg\" alt=\"\" class=\"wp-image-509\" srcset=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-500x334.jpg 500w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-300x200.jpg 300w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-767x512.jpg 767w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-1536x1025.jpg 1536w, https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/nodule-de-pyrite-2048x1367.jpg 2048w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Documentation :<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><sup>1<\/sup>Latin et langues techniques, Jean-paul brachet, Claude Moussy, p.13<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><sup>2<\/sup>R. Dion, Le \u00ab\u00a0bon\u00a0\u00bb et \u00ab\u00a0beau\u00a0\u00bb pays nomm\u00e9 Champagne pouilleuse, L&rsquo;Information G\u00e9ographique, 1961, p. 209-214<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><sup>3<\/sup>Cl\u00e9ment Mathie, Charles Pomerol, Caract\u00e8re, origine, mise en place et role morphologique des gr\u00e8zes crayeuses de champagne s\u00e8che au nord de Reims,&nbsp;Bulletin de l&rsquo;Association fran\u00e7aise pour l&rsquo;Etude du Quaternaire 1976-1, page 45-51<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><sup>4<\/sup>Joseph Garnotel, Le d\u00e9veloppement de l&rsquo;agriculture en Champagne Crayeuse de 1945 \u00e0 nos jours, Economie rurale, 1981, p.36<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Joseph Garnotel, L&rsquo;ascension d&rsquo;une grande agriculture. Champagne pouilleuse-Champagne crayeuse, Economie rurale, 1985, p. 59-60<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/ficheinfoterre.brgm.fr\/Notices\/0134N.pdf\">Notice explicative de la feuille Monthois 1\/50 000<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.mineralogie.club\/mise-au-point-marcasite-pyrites\">https:\/\/www.mineralogie.club\/mise-au-point-marcasite-pyrites<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Craie et marnes sur l&rsquo;\u00e9chelle g\u00e9ologique Ceux sont des formations g\u00e9ologiques issues du Cr\u00e9tac\u00e9 sup\u00e9rieur du d\u00e9but du C\u00e9nomanien. Concernant d&rsquo;autres craies et marnes, leur formation date du Turonien pour la craie de Rethel, puis le Turonien et Coniacien, pour la craie de Ch\u00e2lons, soit une p\u00e9riode de 99,6 \u00e0 85.8 millions d&rsquo;ann\u00e9es.Le C\u00e9nomanien doit [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":496,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-297","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geologie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La craie et les marnes en Argonne - jlargonnais<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/argonne.jlfrance.fr\/?p=297\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La craie et les marnes en Argonne - jlargonnais\" \/>\n<meta property=\"og:description\" content=\"Craie et marnes sur l&rsquo;\u00e9chelle g\u00e9ologique Ceux sont des formations g\u00e9ologiques issues du Cr\u00e9tac\u00e9 sup\u00e9rieur du d\u00e9but du C\u00e9nomanien. Concernant d&rsquo;autres craies et marnes, leur formation date du Turonien pour la craie de Rethel, puis le Turonien et Coniacien, pour la craie de Ch\u00e2lons, soit une p\u00e9riode de 99,6 \u00e0 85.8 millions d&rsquo;ann\u00e9es.Le C\u00e9nomanien doit [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/argonne.jlfrance.fr\/?p=297\" \/>\n<meta property=\"og:site_name\" content=\"jlargonnais\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/jeanlouis.lehingrat\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-15T08:47:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-26T09:52:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/argonne.jlfrance.fr\/wp-content\/uploads\/2026\/10\/craie-2-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1708\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"jlargonnais\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"jlargonnais\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297\"},\"author\":{\"name\":\"jlargonnais\",\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/#\\\/schema\\\/person\\\/8f1270b03e7b335badec2807495accd7\"},\"headline\":\"La craie et les marnes en Argonne\",\"datePublished\":\"2026-10-15T08:47:21+00:00\",\"dateModified\":\"2026-10-26T09:52:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297\"},\"wordCount\":881,\"publisher\":{\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/craie-2-scaled.jpg\",\"articleSection\":[\"g\u00e9ologie\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297\",\"url\":\"https:\\\/\\\/argonne.jlfrance.fr\\\/?p=297\",\"name\":\"La craie et les marnes en Argonne - 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