Chapter 19-Glacial Modification and Terrain

Chapter 19-Glacial Modification and Terrain - North...

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North American Glaciation During the Pleistocene Canada covered South to KS, MS, KY Most mountainous areas Today Much more limited Great Lakes Finger Lakes Alaska and Canada Western Mountains Rockies Cascades
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Glacier Ice Snow and neve Accumulation Zone (above the equilibrium line) Ablation Zone (below the equilibrium line) Equilibrium Line Glacial margin End moraines Outwash streams Sediments deposited by meltwater Advancing vs Receding Glacial Development
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Alpine glaciers in southeastern Alaska near Skagway. A half dozen small-valley glaciers in the high country have united to form the very large Davidson Glacier, which extends off the bottom of the photo. Source: Text. Types of Glaciers Valley Glacier Icefields Alpine Glaciers Cirque Glacier Mountain Glaciers Valley Glaciers Alpine Icefields Nunataks Tributaries Cirque Piedmont Glaciers Ice Sheets
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Glacial Movement As a glacier grows in size and mass, gravity begins to propel it downslope. Its speed is governed by multiple factors including As the glacier moves downslope, it picks up rocks and debris. A glacier’s rate of movement may be determined by monitoring and charting the location of recognizable rocks and debris. In the series of diagrams below observe the large rock move downslope.
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  • Spring '07
  • BROWN
  • Glacier, Alpine Glaciers, University of Cincinnati Glacier Gallery, Icefalls Lateral moraine Valley glacier Lateral moraine

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Chapter 19-Glacial Modification and Terrain - North...

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