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Mayenne-Sciences
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GROTTE DE MAYENNE-SCIENCES Thorigné-en-Charnie (Mayenne) Située dans le canyon de Saulges. en Mayenne, c'est l'une des rares grottes ornées du nord de la Loire. Ses dessins au fusain de chevaux, mammouths et bison ont été datés du Gravettien (25 000 ans environ). En 2005, des figurations paléolithiques ont été découvertes dans une grotte voisine : la grotte Margot.
