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Definition
| The balance of a glacier between the input of snow by accumulation and output due to melting |
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Definition
| Net gain of ice as snow accumulates |
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Definition
| Where ice leaves the system by melting |
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Definition
Large cracks formed on extending flow areas
Form due to differences in glacial velocity
Upper layer cracks while the underlying ice continues to flow |
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Term
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Definition
Marginal
Transverse
Longitudinal |
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Term
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Definition
Form from the edge of the glacier, due to the reduction in speed caused by friction of the valley walls.
Marginal crevasses are usually transverse to flow |
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Term
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Definition
| Are transverse to flow, as a glacier accelerates where the slope steepens |
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Term
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Definition
| Form semi-parallel to flow where a glacier expands laterally |
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Term
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Definition
Exhibit normal movement until suddenly they accelerate
Failure of underlying bedrock
Ponding of melt water at the glaciers base
Accumulation of mass beyond a critical "tipping point" |
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Term
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Definition
Snowflake
Granular Ice
Firm
Glacial Ice |
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Term
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Definition
Largest glacial bodies
Antarctica / Greenland |
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Term
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Definition
A permanent accumulation of snow and ice
Typically found below the snow line |
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Term
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Definition
Ocean ice that freezes
28 degrees |
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Term
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Definition
A thin, almost knife-like, ridge of rock
Fformed when two glaciers erode parallel U-shaped valleys |
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Definition
A landform found among mountains as a result of alpine glaciers
Creates a large bowl shape |
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Definition
| A mountaintop that has been modified by the action of ice during glaciation and frost weathering |
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Definition
| One of a series of glacial lakes connected by a single stream or a braided stream system |
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Definition
A long winding ridge of stratified sand and gravel
Continental Glacier |
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Term
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Definition
| a piece of rock that differs from the size and type of rock native to the area in which it rests |
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Definition
| An elongated whale-shaped hill formed by glacial ice |
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Definition
| Glaciated bedrock surface, usually in the form of rounded knobs |
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Definition
| Any glacially formed accumulation of unconsolidated glacial debris |
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Term
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Definition
An irregularly shaped hill or mound composed of sand, gravel and till
Accumulates in a depression on a retreating glacier |
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Term
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Definition
| Best known for his theory of the ice age |
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Term
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Definition
| A landlocked basin which fills with rainwater during times of glaciation, when precipitation is higher |
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Term
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Definition
| Occur from ice blockage suddenly melting back or fracturing and producing catastrophic floods |
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Term
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Definition
Last Glacial Maximum
Marks the peak of the last glacial period
Refers to a period in the Earth's climate history when ice sheets were at their maximum extension |
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