The Pleistocene glaciations almost entirely covered Scotland in ice, and Arran's highest peaks may have been nunataks at this time. After the last retreat of the ice at the close of the Pleistocene epoch sea levels were up to lower than at present and it is likely that circa 14,000 BP the island was connected to mainland Scotland. Sea level changes and the isostatic rise of land makes charting post-glacial coastlines a complex task, but it is evident that the island is ringed by post glacial raised beaches. King's Cave on the south west coast is an example of an emergent landform on such a raised beach. This cave, which is over long and up to high, lies well above the present day sea level. There are tall sea cliffs to the north east including large rock slides under the heights of Torr Reamhar, Torr Meadhonach and at Scriden (An Scriodan) at the far north end of the island.