 At that time, with sea levels slightly below those at present, Jersey was part of Normandy, a peninsula jutting out from the coast, and La Cotte would have been a prominent landmark on the dry plain that linked Jersey to the French mainland.It was not until after the last Ice age that the sea eroded the coastline, separating first Guernsey, then Jersey and finally the Écréhous from the mainland.Remains of fire was found in La Cotte.