EAS210 Lecture Notes - Lecture 6: Basal Sliding, Pleistocene, Dropstone
30 Nov 2018
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Chapter 17, p. 382-409 earth: an introduction to physical geology 4ce. Presently 10% of the land surface is covered by glaciers, but in the. However, in wet-based glaciers the ice at the base moves with respect to the substrate, so sediment may also be pushed up ahead of the advancing glacier: erosion, erosional processes. Most of these features relate to the activity of alpine or valley glaciers, whose flow is confined to valleys in mountain regions; these contrast with continental glaciers, which spread out across a continent. U-shaped valley described and illustrated: glacial activity rounds out a valley which would otherwise have been a v-shape from fluvial activity. Hanging valley described and illustrated: the valley floor of a tributary glacier is well above the floor of the main or trunk glacier. Cirque - described and illustrated: a bowl or amphitheatre shaped depression scooped out at the head of a glacier.
