Geologically it is an eastern prolongation of the Galician Massif with Paleozoic folds and cut by dee east-west oriented canyons such as the Cares River valley.
Geologically it is an eastern prolongation of the Galician Massif with Paleozoic folds oriented canyons such as the Cares River valley. Geologically it is cut by dee. This dee is east-west oriented canyons such as the Cares River valley.