Faith Bailey Geography- Miss R revision

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Katabatic winds
Cold mountenous winds- the dense air flows down from the mountains to the lowlands chilling the ground as it passess over it.
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Abrasion
(Sandpaper effect)-The erosion of the bedrock by material carried by the glacier. The larger and more angular the bedload is, the greater potential for erosion.
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Plucking
The ripping out of matewrial ftom the bedrock. The more freeze-thaw there has been, the more effective the plucking becomes. The material acn then be used for abrasion.
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Chatter marks
Discontinuous scratch marks on a rock cause by abrasion
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Striations
Scratch marks on arock caused by abrasion
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Roche montonnee
Rock that has been plucked and made smooth by glaciers. Upstream side (stoss) is smooth because of abrasion but the downstream side (lee) is steeper and rougher because of plucking.
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Carbonation
Chemical weathering- calcium carbonate reacts with an acid water o form calcium bicarbonate which is soluble and removed in solution.
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Hydrolysis
Chemical weathering- H2O reacts with minerals (feldspars) to make clay minerals.
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Till
Sediment deposited by a glacier.
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Cirques
Armchair-shaped hollow surrounded by knife-edged ridges called aretes.
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Neve
A transitional stage between snow and ice.
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Extrusion flow
Movement of ice as it becomes too deep so unstable. It collapses and flows outwards.
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Glacial troughs
Have steep sides and a flat bottom also known as U-shaped valleys
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Freeze-thaw weathering
Rock fractures due to pressure release, exfoliation and dilation.
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Other cards in this set

Card 2

Front

(Sandpaper effect)-The erosion of the bedrock by material carried by the glacier. The larger and more angular the bedload is, the greater potential for erosion.

Back

Abrasion

Card 3

Front

The ripping out of matewrial ftom the bedrock. The more freeze-thaw there has been, the more effective the plucking becomes. The material acn then be used for abrasion.

Back

Preview of the back of card 3

Card 4

Front

Discontinuous scratch marks on a rock cause by abrasion

Back

Preview of the back of card 4

Card 5

Front

Scratch marks on arock caused by abrasion

Back

Preview of the back of card 5
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