Caractéristiques et âges des cinq cycles paléozoïques du Nord-Ouest de la Corse

The Galeria region presents the essential features allowing for a reconstitution of the pre-Mesozoic evolution of the corsico-sardinian block. The following five assemblages can be recognized:

1. Micaschists
2. Sandstones-quartzites (Early Ordovician?)
3. Conglomerates and quartzites, dark slates dated Early Silurian from Acritarchs and Chitinozoans, sandstones and lydians
4. Limestones with a microfauna of the Devonian-Dinantian boundary, sandy and pelitic Culm
5. Conglomerates and andesitic tuffs of Late Carboniferous.

All these assemblages are separated by unconformities (somewhat in certain between 3 and 4). The regional metamorphism thought to be, up to now, Variscan or late Caledonian is much older, perhaps Briovarian.