18: glaciers and glaciation Flashcards

1
Q

a thick mass of ice originating on land from the compaction and recrystallization of snow

A

glaciers

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2
Q

large masses of ice

A

ice sheets

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3
Q

glaciers that flow down mountain valleys

A

valley glaciers

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4
Q

what forms when glaciers grow into the ocean and spread out to form a wide layer of floating ice

A

ice shelves

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5
Q

like smaller ice sheets

A

ice caps

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6
Q

both ice caps and ice sheets may be drained by

A

outlet glaciers

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7
Q

any sediment of glacial origin is called

A

glacial drift

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8
Q

two types of glacial drift are

A

till and stratified drift

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9
Q

which of the glacial drifts is sorted and deposited by meltwater from a glacier?

A

stratified drift

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10
Q

which of the glacial drifts isn’t sorted, just deposited right there by the ice

A

tills

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11
Q

an ice sheet that acts as a dam by trapping meltwater or blocking the flow of rivers to create

A

proglacial lakes

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12
Q

what is lithified till called

A

tillite

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