Geology, identity of the territory

The geological formation of the “Caps” cannot be found anywhere else in the world, and this is reflected in its name: the pink sandstone of Frehel-Erquy. Formed 470 million years ago, this sedimentary rock reflects the history of a range of mountains and its erosion. The colour, appearance and local usage of this rock contribute greatly to the identity of the “Grand Site”.

Diorite, sous-bassement du Fort la Latte

Filon de Dolérite

Pointe de la Heussaye