The lower section is siltstone, mudstone and calcilutite
There is variation to reef limestones and calcilutite in the upper beds.
The Basement sequence is overlain by deposition of sedimentary packages, where the calcareous shales, lutite, calcilutite and evaporite levels reported in the wells were found intercalated with bioclastic calcareous layers that would function as seal rocks.
During Cenomanian/Turonian, locally up to the Lower Campanian, pelagic carbonates and hemipelagic claystones were deposited (marls, clayey limestones and occasionally calcilutite
turbidites and mudflows).
The studied succession consists of 7 lithofacies expanded from Barnolas and Simo (1987) including: boulder-pebble conglomerates, graded pebble conglomerates, graded peloidal-ooid packstones, graded oolites, calcilutites, Posidonia coquina and cherty mudstones.
Microfacies: A variety of microfacies are found within the calcilutites of the Cutri Formation.
The clay has a variable content of carbonate and has thin intercalations of clayey calcilutites
0 m) thick; under it, there are compact sedimentary rocks (limestones, sandstones, calcilutites
or fine-grained limestone) and, in areas of piedmont, fine-grained rock materials.
The vegetation clearly reflects this phenomenon; thus, in the Chablais, the region of the Savoy Alps that dominates the southern shores of Lake Leman, the soils located in high areas, on calcilutites
, are covered in an acidic turf, while in the lower areas the soils are calcic and have calcicolous vegetation.