Located on the north-eastern borders of the Massif Armoricain, Norman Switzerland is bordered by the Virois Bocage, the Mortainais, and the Domfrontais to the west. To the east and north, it adjoins the Caen plain and the Falaise and Argentan countrysides of the sedimentary geological ensemble of the Bassin Parisien. Norman Switzerland is, therefore, at the meeting point of two large geological units with very different rocks - old and hard on the Armorican massif side; recent and tender on the Paris basin side - at the origin of the reliefs and cliffs that characterize it.