Kaolin deposits of the Charentes Basin
The Kaolin deposits of the Charentes Basin in France are clay deposits formed sedimentarily and then confined by other geological structures. == Overview == The geological unit called Charentes basin is composed of Eocene and Oligocene deposits, laid above karstic limestone formations of the Campanian, in the north of the Aquitaine Basin.
Source: Wikipedia — Kaolin deposits of the Charentes Basin (CC BY-SA 4.0)