GEO 102 Study Guide - Final Guide: Photosynthesis, Latent Heat, Milankovitch Cycles
Document Summary
Glacier - a thick ice mass that originates on land from the accumulation, compaction, and recrystallization of snow. Glacier types: mountain also known as alpine or valley glaciers, form at high altitudes, smaller than ice sheets, lengths greater than widths. Shaped a bit like rivers: only cover a small region, continental also known as ice sheets glacier, large scale cover 10% of earth"s land, form at high latitudes, close to the poles. Glacier movement: internal movement flowing solid 200 m/yr, rotation of grains (firn, slipping along weak surfaces, melting and refreezing, external movement, basal slip slipping on a layer of water between the ice and bedrock 200 m/yr. Out ablation, general term for loss of ice or snow from a glacier. If this happens in water the chunks are icebergs. Glacial landforms: valley glaciers tend to accentuate the landscape (make it sharper) Hanging valley a tributary that enters a glacial trough high above the floor of the trough.
