GEO 102 Study Guide - Midterm Guide: Glacier, Tide, Global Cooling
Document Summary
Continental-large scale ice sheets, cover 10% of earth. Internal-rotation of grains, slipping along weak surfaces, melting and refreezing. External-basal slip-slipping on a layer of water between the ice and bedrock. Towards the center away from the bottom and sides, moves fastest where tension is weakest. Zone of ablation-loss of ice or snow from glacier. Describe the types and locations of glacial sediment. Sorted sediments-sorted material laid down by glacial melt water. A pile of debris that has been transported and deposited by a glacier. Ridge of sorted sand and gravel deposited in sub-glacial melt water tunnels. A water filled depression left by a glacial ice block. Boulders, transported by glaciers and left on the surface as the glacier melted. Elongate hills formed when a glacier overrides glacial till-tear drop shaped. Sand and gravels deposited by glacial melt water. A pyramid-like peak formed by glacial action in three or more cirques surrounding a mountain summit.
