Earth Sciences 1022A/B Lecture Notes - Lecture 17: Glacier Terminus, Water Cycle, Geosphere
20 Dec 2018
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Document Summary
Important parts of two fundamental parts of earth"s system: 1. They hydrologic cycle (of the hydrosphere: most of our fresh water is frozen in glaciers, 2. Agents of erosion, as part of the rick cycle (of the geosphere) Types of glaciers: ice sheets immense sheets of ice on a continental scale, e. g. greenland and antarctica flow radially from areas of greatest ice accumulation, alpine valley glaciers relatively small, occupying mountain valleys flow downslope. Movement of glacial ice: glaciers move in three main ways, 1. Internal deformation ice collapses and flows away from the area of thickest snow/ice accumulation under the influence of gravity: 2. Materials underlying the glacier (sub glacial materials) can deform due to friction with the moving ice above. The erosive power of glaciers glaciers are important agents of erosion (removal of particles) they erode underlying rock by: 1. Plucking removing particles from bedrock surfaces: 2.
