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today's Swiss Plateau was a Karst plateau somewhat inclined to the south. Through processes of rising and lowering that were brought by the folding of the Alps, the area was twice flooded by a sea. The corresponding sediments are distinguished as sea molasse and freshwater molasse, even though the latter consists rather of fluvial and eolian sediments (a kind of mainland molasse).
* Lower sea molasse (around 37 - 30

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