180 millions years ago Burgundy was under the sea.

60 millions years ago the movement of tectonic plates and shifting of the continents caused the base of the seabed to appear.

Today’s geological relief results from the emergence of the Morvan block and of its slow erosion, as well as the collapse of the Bressan block.

Burgundy’s gentle slope is a result of millions of years of erosion and variation in temperatures.

The upper slope is composed of hard rock between which silt and residue has penetrated.