Upland morphology suggests pre- or early-Weichselian glaciation prior to the inception of existing cirque basins formed when frrn limit was 450 msl. Directional elements indicate complete ice cover probably during the main Weichselian ice advance. Cirque parameters suggest that 250-300 m of upland has been removed through a combination of glacial and fluvial erosion. Marine shells were dated by radiocarbon at 12,860±250 yrs. BP designate an Older Dryas ice advance. Ice-cap conditions subsequent to the Older Dryas advance and a rising firm limit during deglaciation is postulated, with the probability of nivation processes occurring during Younger Dryas time. lsostatic adjustment of 134- 138 m since Older Dryas time (12,000 yrs. BP) is calculated and a relative isostatic uplift of 12 m since Tapes transgression (6000 yrs. BP).