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17 Cards in this Set
- Front
- Back
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2 main types of glaciers |
Alpine/Valley Ice Sheets/Continental |
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where more snow falls than melts (net gain)
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zone of accumulation or snowfield
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where more snow/ice melts than falls (net loss)
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Zone of Wastage/Ablation
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Form of wastage in which ice turns into water vapor
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sublimation
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How can you tell if a valley was created by a glacier or a river?
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glaciers create U-shaped valleys rivers create Vshaped valleys
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Large boulder that was transported by a glacier
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glacial erratic
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Type of plastic movement that occurs below the zone of fracture |
(internal) flow |
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Cracks caused by the glacier moving over uneven terrain
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crevasses
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Top fifty meters of a glacier
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zone of fracture
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Terminus movement when accumulation exceeds ablation/wastage
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Advances down the slope
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A period of increased velocity that some glaciers experience
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surge
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Form of wastage in which large chunks of ice break off
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calving
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Tributary valley suspended above the main glacial trough
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hanging valley
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Whose theory links glacial/interglacial alternation with orbital cycles?
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Milankovitch
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What 3 orbital variations combine to cause glacial and interglacial alternation? |
Eccentricity Obliquity Precession |
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What theory best explains the onset of an ice age?
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Plate Tectonics Theory
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Utah’s Great Salt Lake is a remnant of this large pluvial lake
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Lake Bonneville
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