GEO 131 Lecture Notes - Lecture 6: Hubbard Glacier, Glacial Landform, Lithosphere
5 Oct 2016
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Document Summary
Four types of rock: igneous youngest, sedimentary oldest, metamorphic, magna. Type of rock tells you the environment it was formed in and how old it is. Ice as a land forming agent: it was almost entirely responsible for the landscape that we know around ontario and toronto. River valleys: these were all created by glaciation. Ice cap continuous sheet of ice covering entire landscape. Ice field buries all but tallest mountains can be thick. Alpine glaciers flows down valleys away from high country. Cirque bowl-shaped depression on mountain flank due to glacial erosion. Snow source: alaskan glaciers, hubbard glacier, lateral transportation, medial transportation, continental glaciers. Huge ice masses covering a large part of a continent or large island also called ice sheets. More than 3000 m deep in places. Weight of ice presses lithosphere down into asthenosphere, called isostatic depression.
