The last interglacial shoreline in northern Brittany, western France

Shorelines of the last interglacial highstand in western France are mainly represented by rocky abrasion platforms on which fossil gravel barriers are located. These coastal accumulations are scattered around islands (Ouessant, Belle-Ile) and on the mainland. They are buried by periglacial deposits, consisting of successions of sandy/gravelly units, then heads, loess and sands. OSL dating has allowed the first sandy/gravelly layers to be dated to 90 ka and the loess and sands to 6.4 ka and 0.47 ka. The comparison of the precise stratigraphy of several cross-sections enables the reconstruction of the evolution of the landscape and the description of the configuration of the coastline at the end of the last interglacial.