Armorican Massif
The timing of the shearing motions is based on comparisons with similar terrains in the Armorican Massif (Chantonnay synform in the Vendée) and in the Rouergue. The dextral shearing in the Armorican Massif is dated as Namurian and Westphalian (Serpukhovian till Moscovian), i.e. 325 to 305 million years ago. It is therefore reasonable to assume a mid- to late Carboniferous age for the deformations in the Génis Unit of the southern Limousin.