Garnet and biotite in micaschist of Rayol le Canadel
Metamorphic rocks
By Le Canadel beach, the micaschist hosts garnet, staurolite, biotite and quartz veins. The garnet are locally more concentrated, the biotite in concentrated around a quartz vein making the black surroundings. Staurolite can be also observed in this rock beach.
Picture by Anne-Sabine Grosjean and Baptiste Suchéras-Marx