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Marine Places

Gruinard Bay

Around Gruinard Bay in Scotland there is evidence of a phenomenon known as postglacial rebound, in which a landmass, once pushed down by the huge weight of ice sheets during the last ice age, rises again. In some areas, such as Scotland and Scandinavia, this upward rebound has outstripped the sea-level rise caused by the ice sheets melting. At Gruinard Bay, rebound is indicated by its raised beaches—flat, grassy areas behind the present-day beaches. Over the last 11,000 years, this part of Scotland has been moving upward relative to sea level at about 2 in (5 cm) per century.

Gruinard Bayzoom image
  • Atlantic Ocean Northeast
  • Type Primary coast
  • Formation Ice-sheet retreat and postglacial rebound
  • Extent 8 miles (13 km)
  • Location Location West of Ullapool, northwestern Scotland, UK
Gruinard Bay habitat mapzoom image