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Chapter 7.1

Glaciers

TermDefinition
ice age a period of time when much of Earth's land is covered by glaciers
glacier a thick mass of ice originating on land from the compaction and recrystallization of snow that shows evidence of past of present flow
snowline lowest elevation in a particular area that remains covered in snow all year
valley glacier a glacier confined to a mountain valley, which in most instances had previously been a stream valley; also known as an alpine glacier
abrasion the grinding and smoothing of a rock surface by rock fragments that are carried by ice, wind, or water.
till sediment of different sizes deposited directly by a glacier
moraine a ridge of unsorted sediment left by a glacier
drumlin a streamlined asymmetrical hill composed of glacial till; The steep side of the hill faces the direction from which the ice advanced.
esker sinuous ridge composed largely of sand and gravel deposited by a stream flowing in a tunnel beneath a glacier near its terminus
Created by: user-1875214
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