The Chaland limestone strata

This part of the Pause ravine is composed of a laminate of limestone strata and marly strata which the small stream laid out due to erosion. Formed 113 million years ago, these sedimentary layers are now perched at an altitude of some 580 meters by the folding of the Alpine arc. Since calcareous layers are more resistant to erosion than marl layers, it is logical that a layer of limestone covers the top of this ravine.