Abstract

The Chartreuse massif is the smallest of the subalpine massifs but it contains the most important underground systems of French Alps. The massif of Chartreuse is characterized by parallel folds directed N020°. The eastern plateau spreads out urgonian limestone (perched syncline) ; it contains the two greatest cave systems : " Alpe-Alpette" (54 km) and "Dent de Crolles " (54 km). On the W, the limestone layers are erected by the orogenic strains and thereby, the caves are very deep : " réseau Ded" (-780 m), " puits Francis " (-723 m), " gouffre de Génieux" (-675 m )... The hydrologie drainage is made by two transverse rivers : the " Guiers Vif " and the " Guiers Mort " which cut up the region into small hydrological basins. The greatest of them is " Guiers Vif " basin with an area of 9,2 km2.

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