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La ruffe, roche rouge du lac du Salagou. ( Hérault )
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Pilou et Marino
Pilou et Marino
Ce sous-sol est constitué d'une roche rouge appelé la « ruffe ». Il s'agit d'une forme d'argilite, une combinaison de sédiments argileux et d'oxydes de fer. Ces roches sédimentaires sont datées du Permien (-298 à -252 millions d'années).
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