GCSE physical geography notes : Formation of Ribbon lake

A ribbon lake is a long and narrow lake, usually found in a glacial trough. Its formation begins when a glacier moves over an area containing alternate hands of hard and soft bedrock. The sharp-edged rocks that are picked up by the glacier and carried at the bottom of the glacier erode the softer rock more quickly by abrasion, thus creating a hollow called a rock basin. On either side of the rock basin, the more resistant rock is eroded less and these outcrops of…