occurs when water gets trapped in a glacier and can't get out, Buildup of pressure lubricates the base and allows the glacier to flow rapidly until water can get out.
Occurs when small fragments of embedded rock scrape underlying bedrock and produce long, nearly parallel scratches as basal sliding occurs
bowl shaped and found at the glaciers head
Two cirques on opposite sides of a mountain meet and form a sharp crested ridge
Sediment left behind in a raised be when a glacier subsequently retrates
Pits and pocket marks left behind by blocks of ice embedded in the glacial debris.
Distinctive landforms resulting from intense frost action and large annual range in temperature
A thin layer near the surface that melts during the summer and freezes during the winter
Represent former land surfaces and provide information about climate and weather at the time they were formed
preserves small bubbles of ancient atmosphere and tell us the exact chemical composition of the atmosphere up to 160,000 years ago