Le 7 février 2021
Découverte des mines de bauxite de La Treille, sous la Tête Ronde au Garlaban. On accède après un boyau d’une quinzaine de mètres à un petit réseau de galeries minières désormais inexploitées, mais encore dotées de leurs rails et wagons de transport, une belle ambiance post-industrielle. Les parois des galeries offrent également un début de concrétionnement sous la forme de draperies et stalactites (tout comme dans le tunnel abandonné du Rove), et de belles couleurs aux plafonds avec les filons métallifères, le tout collé sur le rocher rouge riche en bauxite des lieux.
Une belle balade souterraine donc, aussi insolite qu’esthétique.
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la barre rouge près de l'entrée
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dans les galeries sous les filons colorés et les concrétionnement naissants
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les vestiges de l'exploitation, ca rouille mais ça roule !
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