Geology final
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Glaciers are part of Two basic cycles... | Hydrologic cycle, and Rock cycle
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| A think mass of ice that originates on land from the accumulation, compaction, and recrystallization of snow | Glacier
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| *Exist in mountain areas*Flow down a valley from an accumulation center at it's head | Valley (alpine) glaciers
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| *Exist on a larger scale than valley glaciers*Two major ice sheets on Earth are over Greenland and Antarctica*Often called continental ice sheets*Ice flows out in all directions from one or more snow accumulation centers | Ice Sheets
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| Other Types of glaciers are | Ice capsOutlet glaciersPiedmont Glaciers
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| Snow is recrystallized into a much denser mass of small grains called.. | Firn
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| Occurs within iceUnder pressure, ice behaves as a plastic material | Plastic flow
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| Entire ice mass slipping along the groundMost glaciers are thought to move this way by this process | Basal slip
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| the area where a glacier forms | Zone of Accumulation
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| the area where there is a net loss to the glacier due to melting | Zone of wastage
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| The breaking off of large pieces of ice | Calving
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| lifting of rocks | Plucking
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| Rocks within the ice acting like sandpaper to smooth and polish the surface below | Abrasion
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| Pulverized rock | Rock flour
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| Grooves in the bedrock | Glacial striations
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| material that is deposited directly by the ice | Till
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| Sediments laid down by glacial meltwater | Stratified drift
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| Layers or ridges of till | Moraines
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| Moraines produced by alpine glaciers | Lateral moraineMedial moraine
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| Smooth, elongated, parallel hillsSteep side faces the direction from which the ice advancedOccur in clusters called drumlin fieldsFormation not fully understood | Drumlins
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| Often pockmarded with depressions called | Kettles
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| Four major stages recognized in North America | NebraskanKansanIllinoianWisconsinan
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