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Mines de Collonges et de Dorennaz | Michel DemierreMichel Demierre Mines de Collonges et de Dorennaz | Michel Demierre
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Artificielles Cavités

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Mines de Collonges et de Dorennaz | Michel Demierre

Les mines d’anthracite de Collonges Dorennaz. Au-dessus de Collonges, plusieurs centaines de mètres de galeries, dont certaines concrétionnées, sont explorables.