GEOL 1340 Chapter Notes - Chapter 14: Glacier Morphology, Ice Shelf, Ice Crystals
22 Nov 2016
School
Department
Course
Professor
Document Summary
4:56 pm: snow into ice- the basis of glaciers. Formation of glacial ice: types of glaciers. Snowline: lowest elevation where snow remains year-round. Firn- granular, partly compacted snow that is intermediate btwn snow and ice. Cirque: bowl-shaped recess at head of valley. Piedmont glacier: formed wherever several valley glaciers pour out of their confining valleys. Supraglacial debris: originates from rock falls that carry material down. Calving: ice pieces break free that make icebergs. Ice shelf: when continental ice sheet meets the coast. Outlet glacier: stream of ice flowing out from ice sheet: glacial processes. Greatest mvmt within valley glacier is internally. Basal slip: less rapid than internal plastic flow of glacier so upper portion of glacier flows ahead of lower portion. Abrasion: makes smooth surface on exposed rock. Roche moutonnee: made by glacial plucking and abrasion, asymmetrical hill of exposed bedrock. Arete: thin sharp ridge that forms btwn parallel valleys.
