Age: Danian (First stage of the Palaeocene, 60 to 65 My.)
Thickness: 50 to 100 metres
Fossils: Rare terrestrial gastropods.
Description of the unit:
It is red to yellow marl with distinctive traces of palaeosols, locally interrupted by a small sandstone layer, sometimes conglomeratic lenses or thin limestone beds. The difference in tone between the two units of this formation - bright reddish for the first, yellow-ochreous for the second – may indicate a climatic evolution from warm and dry to warm and humid. This is perhaps linked to the altitude.