The lower section is siltstone, mudstone and calcilutite
. Lijaya Fm.
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).
Within the study area the stratigraphic sequence is made up by laterally heteropic and interfingering lenses of thin-bedded grey, red and green marly argillites, calcilutites
, calcareous marls, carbon-rich fossil diatoms with sulphur concretions, clays, and marls with laminae of small gypsum crystals [20, 22].
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
. In places organicrich sediments indicate stagnant conditions.
The soil is 2-7 ft (0.5-2.0 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.