Formation of glaciated features

Description of how glaciated features are formed

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  • Created on: 31-03-12 14:32
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Formation of Glaciated Features
Glacial Erosion Features
1. Cirques
2. Arêtes and Pyramidal Peaks
3. Glacial Troughs with rock steps, truncated spurs, hanging valleys, ribbon
lakes, fjords
4. Striations
5. Roche mountonees
6. Scouring of surfaces e.g. large scale in lowland areas
Glacial Deposition Features
1. Erratic
2. Moraine ­ Ground moraine, boulder clay, lateral, medial, terminal,
recessional, push
3. Drumlins
Fluvioglacial features- Erosional
1. Meltwater channels, cols (spillways)
Fluvioglacial features ­ Depositional
Non ice contact
1. Outwash Plains
2. Prolonged drift, varves, lake deltas
Ice contact Drift
3. Kame, kame terraces, kame deltas
4. Eskers
5. Kettles
Periglacial Features
1. Patterned Ground
2. Pingos
3. Ice wedges/ Ice wedge polygons
Glacial Erosion Features
1. Cirques

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Snow collects in a pre-glacial hollow, more accumulates turning it into ice. Freeze thaw steepens
the back wall. Plucking removes rock from the headwall. Abrasion removes rock from the bottom
of the headwall, causing a deep thick basin.…read more

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The coarsest and heaviest materials (gravel etc) are
deposited first, closest to the ice margin and the finer materials are carried much farther down
the valley (clay deposited last).
2. Prolonged drift, varves, lake deltas
Prolonged drift consists of material that is dropped in glacial lakes such as varved clays, along
lake shorelines and as lake deltas such as Vale of Pickering.…read more

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When the ice melts they leave enclosed
depressions which often fill with water to form kettle hole lakes. E.g. Western Greenland in
Isunngua Highlands.
Periglacial Features
1. Patterned Ground
Found in Periglacial areas, it is the appearance of lines and polygonal stones on the surface of the
ground, produced by frost heaving and the sorting of different sized material during the expansion
and contraction of the soil with diurnal temperature variation.
E.g.…read more

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Long Hanborough Carrot nr
Oxford.…read more

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