By the beginning of Triassic, the 140 by 200 km Southeast Basin, in southeastern France, started to rapidly subside accumulating up to 4 km of Triassic sediment including a considerable amount of evaporites. During Jurassic and Cretaceous, the subsidence continued and the total sedimentary cover today exceeds 12 km. The deeply buried Triassic evaporites are hot and consequently highly fluid. The sedimentary cover should be thus decoupled from the basement and one should expect that the tectonics affecting the basin, including the present seismogenic tectonics, be thin-skinned, on top of a level of decollement coinciding with the Triassic evaporites. It...

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