Glacier Systems and the Ice Age

Glacier Systems and the Ice Age -...

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Glacier Systems and the Ice Age  OVERVIEW   This chapter examines the role of glacial ice as a denudation and landforming agent.  Glacial ice had a major impact on the landscapes of midlatitude and subarctic regions  during the past Ice Age, and still covers many high latitude and high elevation areas of  the earth. Glaciers  are natural bodies of land ice that have, or have had in the past, the  ability to flow. They form where winter snowfall exceeds summer  ablation  over  long periods of time.  Glaciers erode the land surface by  plucking  and  abrasion . Eroded material is  incorporated into the glacier, transported and eventually deposited when the ice  melts.  Alpine glaciers  form in  cirques  in high mountain locations and often flow down  pre-existing stream valleys carving them into U-shaped  glacial troughs Ice sheets  are accumulations of ice that cover large areas and extend over major 
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This note was uploaded on 11/10/2011 for the course GEA GEA2000 taught by Professor Wong,faith during the Fall '09 term at Broward College.

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Glacier Systems and the Ice Age -...

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