An atypical rock
In contrast to the Calanques of Marseille and Cassis, the Calanques of La Ciotat are distinguished by an ochre-colored rock called the pudding-stone.
The pudding-stone of La Ciotat is formed of pebbles from erosion of the Alps and the Pyrenees mountain massifs, which were transported by rivers to the Mediterranean sea several million years ago. These pebbles were then cemented together by a matrix of sand, clay and calcite to form the solid rock we see today.