1709003
Description
Flashcards by Lucy Monger, updated more than 1 year ago
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Created by Lucy Monger
over 9 years ago
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| Question | Answer |
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Kettle Holes |
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Pyramidal Peak |
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Moraines |
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Hanging Valley |
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Corrie/Cirque With a Tarn |
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Kames |
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U-Shaped Valley |
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Ribbon Lake |
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Roche Moutanee |
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Esker |
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Drumlin |
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Arete |
| Erratic | |
| What are the two overall methods for depositional landforms? | -Ice Contact Deposits -Glaciofluvial Deposits |
| Ice Contact Deposits | -Ice transports material on it, in it and below it -The deposited material is known as glacial till (boulder clay) |
| Glaciofluvial Deposits | -The meltwater of ice flowing on the ice, in it or below it -Meltwater streams carry debris and deposit during times of deglaciation and ablation |
| How is a corrie formed? | EROSIONAL -North east slope aspect, glacial feature -Rotational-flow and extrusion flow move glacier from hollow -Abrasion/plucking as travel downhill due to basal sliding -Bergschrund (crack/crevasse in glacier) -Tarn left from melted glacier -Arete= 2 Pyramidal Peak=3 |
| Arete | EROSIONAL A knife-shaped edge -Formed when two corries form side by side |
| How are erratics formed? | DEPOSITIONAL- ICE CONTACT Large boulders, foreign to local geology due to being dumped by ice normally in flat areas |
| How are hanging valleys formed? | EROSIONAL Small U-shaped valley formed by a small glacier hanging above a large U-shaped valley HINT: Waterfall present |
| Eskers | DEPOSITIONAL- GLACIOFLUVIAL Long sinuous ridges of sand and gravel, varying in height and stretching over km long Represent bedload of ancient meltwater streams |
| Kettle Holes | DEPOSITIONAL- ICE CONTACT -Shallow lakes found on till plains -Formed during deglaciation -Stranded clocks of ice melt creating small depressions |
| Ribbon Lake | EROSIONAL -Long linear lakes filling a glaciated trough (U-Shaped Valley) EXAMPLE: Lake Windermere |
| Pyramidal Peak | EROSIONAL When 3 corries form back to back a high, sharp point of land remains in the centre |
| How are moraines formed? | DEPOSITIONAL- ICE CONTACT -Lines of loose rock fragment from the valley sides and fall on the ice below |
| What are the two types of moraines? | LATERAL MORAINES- Near the valley sides MEDIAL MORAINES- In the centre where two lateral moraines have joined |
| Outwash Plains | DEPOSITIONAL- GLACIOFLUCIAL Layers of sand and gravel extending over low lying areas (Flood Plains) |
| Roche Moutonnee | EROSIONAL -Isolated, hummocky rock Two contrasting slopes: -Smooth= low angled slope (Glacier travelled from this direction) -Rough Rocks= steep jagged gradient, due to glacier plucking rocks |
| Drumlins | DEPOSITIONAL -Oval mounds (few metres long) -Sandy till forms drumlins in low-lying areas -Steeper thicker end faces direction from which the glacier came |
| Kames | DEPOSITIONAL- GLACIOFULVIAL -Conical, flat-topped hills reaching 20-30m high -Made of water-laid sands & gravels washed into holes -Often occur alongside kettle holes |
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