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31 Cards in this Set
- Front
- Back
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El Niño effect |
A blip in the global climate -flooding - droughts |
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Glacial period |
Ice advancement |
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Interglacier |
Period of ice retreat |
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Ice sheet |
Covers 50,000km plus |
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Icecap |
Smaller body of ice, under 50,000km |
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Glacier |
A finger of ice usually extended downhill, and occupying a valley |
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Accumulation |
Inputs into the glacier / snow fall and avalanches |
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Ablation |
Outputs from the glacier budget as it melts |
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Glacier budget |
The balance of the accumulation zone and ablation zone |
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Abrasion |
Process of erosion involving the wearing away of a valley floor and sides |
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Plucking |
Glacial erosion where individual rocks are plucked from the valley floor and sides, freezing into the glacier |
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Rotational slip |
Slippage of ice along a curved surface |
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Moraine |
Sediment carried and deposited by ice |
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Bulldozing |
Pushing of deposited sediment at the snout by the glacier as if advances |
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Hummock |
Small area of raised ground |
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Corrie |
Deep depression on a hillside with a steep back wall and contains a lake |
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Arête |
Knife edged ride, where two glaciers on each side has eroded the landscape |
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Pyramidal peak |
Sharpe edged mountain peak |
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Glacial trough |
A wide, steel sided valley eroded by a glacier |
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Truncated spur |
Eroded interlocking spur, having a very steep cliff |
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Hanging valley |
Past glacier trough perched up on the side of the valley. Often marked by a waterfall |
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Ribbon lake |
Long narrow lake in the bottom of the glacial trough |
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Long profile |
Shows the changes in height and shape along the length of the glacier |
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Lateral moraine |
Sediment running along the edge of the glacier |
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Medial moraine |
Runs down the centre of two meeting valleys |
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Terminal moraine |
Material piled up at the snout of the glacier |
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Ground moraine |
Material dragged underneath the glacier, left behind as hommocky land when it melts away |
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Drumlins |
Smooth, egg shaped hills. Made of medial moraine, moulded rather than dumped. Shapes by moving ice. Blunt end facing towards the valley, more pointed end facing downwards |
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Avalanche |
Rapid downhill movement of snow, ice and rock |
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Loose snow avalanche |
Powdery avalanche, originating from a single point |
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Slab avalanche |
Large scale avalanche, slab of ice breaks away from the main pack of ice |
