The Eyed Orthogneiss represents the oldest rocks in the region, formed between 650 and 540 million years ago during the Cadmonian orogeny.
Rodinia , supercontinent appeared 1.1 billion years ago, disintegrated 750 million years ago in several parts to give birth to other supercontinents such as the Gondwana , Baltica and Laurentia .
650 million years ago, the ocean floor collided with Gondwana, creating new landforms (cademonic orogeny).
This episode generates an important magmatism of which one finds traces in the form of granite (granite of Barral) in the solid mass of the Moors.
This early magmatic rock, formed about 600 million years ago in northern Gondwana, was then transformed by pressure and temperature (metamorphism) to give the Bormes les Mimosas orthogneiss, there are 320 millions of years.
