ESCI 401 Lecture Notes - Lecture 24: Cross-Bedding, U-Shaped Valley, Pyramidal Peak
27 Oct 2017
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Ice crystals stretch, grow and slide past each other. Dominates in cold regions where ice at the base of the glacier is frozen to bedrock i. ii. iii. iv: typical of valley glaciers, basal slip v. The fastest movement of the glacier happens at the center, and the slowest is at the base (where it"s frozen to the bedrock) The melting point of the glacier decreases and pressure increases ii: melting occurs at the base where ice is very thick and lubricating the glacier, what is the characteristic shape of a glaciated valley, crevasses i. ii. They occur where deformation is strong: where ice drags along bedrock walls, where there are curves in the valley, where the slope sharpens steeply, a u-shape is made when a glacier cuts through a landscape. Very steep walls and very wide and a flat bottom i. ii: describe three features carved by glaciers and three features deposited by glaciers. a.
