Term
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Definition
| -Scraping process of rocks |
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Term
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Definition
| -Serrated ridge between U-shaped glacial troughs |
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Term
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Definition
-Occurs under a glacier
-Great pressure cause melting between the ice and rock which facilitates movement down slope |
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Term
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Definition
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Term
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Definition
-Uconfined by topography
-Cover vast areas
-Flow outward in all directions from central areas, even beyond land
-(ice sheets) |
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Term
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Definition
| -Streamlined hills of till shaped by continental glaciers |
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Term
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Definition
| -Ridges of unconsolidated debris deposited at the end of the glacier |
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Term
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Definition
-Boulders that are found far from their source
-Eroded and transported by glaciers |
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Term
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Definition
| -Long winding ridge of gravel |
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Term
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Definition
| -Forms when sea level rises and fills a U shaped glacial valley with sea water |
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Term
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Definition
| -As snow accumulates, it thaws and refreezes becoming a granular type of ice |
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Term
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Definition
| -A glacier's behavior depends on the balance between accumulation and wastage |
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Term
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Definition
| -General term for all glacial deposits |
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Term
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Definition
| -When firn is buried and recrystallized |
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Term
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Definition
| -Glaciers polish rocks as they grind them into a fine powder |
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Term
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Definition
| -Accelerated flow into a glacier causes its terminus to advance rapidly |
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Term
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Definition
| -Mass of compacted and recrystallized ice that flows under its own weight |
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Term
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Definition
| -Consists of an irregular blanket of till deposited under a glacier |
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Term
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Definition
| -A valley where the floor is at a higher level than the channel to which it flows |
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Term
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Definition
| -Pyramid shaped peak left when erosion takes place by at least three glaciers |
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Term
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Definition
| -Similar to continental glaciers but much smaller |
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Term
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Definition
| -Irregularly shaped hill or mound |
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Term
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Definition
| -Parallel ridges of debris deposited along the sides of glacier |
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Term
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Definition
-Time of colder winters and short, wet summers where glaciers advanced and sea ice persisted
-About 1500 A.D. to late 1800's |
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Term
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Definition
| -Ridge of moraine that runs down the center of valley floor |
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Term
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Definition
| -Minor variations in the Earth's orbit around the Sun and in the tilt of the Earth's axis cause slight changes in amount of radiant energy reaching |
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Term
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Definition
-Broad gently sloping alluvial deposit of outwash
-In front of Terminal Moraine |
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Term
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Definition
-Type of deformation that takes place in response to stress
-With great pressure, ice at depth begins to flow as a plastic |
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Term
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Definition
-Transverse ridges running across a valley
-Behind a terminal moraine |
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Term
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Definition
| -Glacial drift that is layered and sorted to some degree |
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Term
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Definition
| -Unstratified sediments deposited directly by glacial ice |
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Term
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Definition
| -When mountain valleys are eroded by glaciers, they are deepened and widened |
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Term
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Definition
-Long, narrow tongues of ice
-Much smaller than continental glaciers
-Flow from high to low
-Confined in mountain valleys |
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Term
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Definition
| -The outwash deposit confined within valley walls |
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Term
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Definition
| -Upper part of the glacier, where snow cover is year round |
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Term
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Definition
| -Lower part of the glacier, where losses exceed gains |
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