Le Mont Jaune, the yellow mount

Le Mont Saint-Michel prend parfois des tons jaune, orange, et doré

In prehistoric times the bay was land. As sea levels rose erosion shaped the coastal landscape over millions of years. Several blocks of granite or granulite emerged in the bay, having resisted the wear and tear of the ocean better than the surrounding rocks. These included Lillemer, the Mont-Dol, Tombelaine and Mont Tombe, later called Mont-Saint-Michel.