Exam 19: Glacial Systems and Landforms

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Crevasses are common _____. ​

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A(n)_______________ is a curved ridge of glacial deposits composed of material of all grain sizes located at the toe of a glacier. (two words)

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Ice caps are smaller than ice sheets. ​

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The Jurassic Period of geologic time was an interval marked by a great number of glacial fluctuations that began about 2.6 million years ago and ended around 10,000 years ago.

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Glaciers that are fed by ice and snow in mountain areas and that usually occupy valleys that were previously created by stream erosion are called _______________ glaciers.

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Patterned ground is a feature of _____. ​

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A valley train is a(n)_____. ​

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Which of these represents a form of glacier ablation? ​

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Large boulders scattered in and on the surface of glacial deposits or on glacially scoured bedrock are called _______________ if the rock they consist of differs from the local bedrock. ​

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Beyond the belts of hills that represent terminal and recessional moraines lie _______________ plains composed of meltwater deposits. These extensive areas of relatively low relief consist of glaciofluvial deposits that are sorted as they are transported by meltwater from the ice sheets.

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The upper surface of a glacier is brittle and often contains cracks called _______________. ​

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Most of the world's glacial ice is located in _____. ​

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Glaciers that extend to lower elevations beyond the mouth of a canyon, spreading out over more open terrain, are called _____. ​

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Where ice sheets reach the ocean by flowing through fjords, the glacial ice is called a(n)_____.

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Two types of alpine glacier are _____. ​

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Net accumulation of a glacier results in glacial advance.

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The Great Lakes of the eastern United States and Canada occupy former river valleys that were vastly enlarged and deepened by glacial erosion. ​

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Lakes that look like prayer beads within abasin that are connected by a stream flowing down a glacially carved valley are called _______________ lakes. ​

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Glaciers can erode rock and sediment by the processes of _____. ​

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Explain the difference between a terminal moraine and recessional moraine and how they are formed. ​

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