A marine deposit has been discovered at 30 m above sea level near Cape Barne. A faunal analysis indicates that it was probably deposited in 180 m (100 fm) of water, and a C-14 determination indicates that it is approximately 35,000 yr old. This age places the time of deposition in one of the mid-Wiirm interstadials of Europe. It is concluded that this deposit has been elevated to its present position through isostatic rebound following the removal of an ice sheet which extended to at least 300 m above the present sea level.