Processes in Cold Environments

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  • Created by: Caitlin x
  • Created on: 08-05-15 12:18

Chemical Weathering by Meltwater

Water becomes acidic because of CO2 containing water

This increases at low temperatures

Weathers carbonate rocks

Rate depends on:

  • Local geology
  • Velocity of glacier
  • Load
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Plucking

Ripping out of the material from the bedrock

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Abrasion

Erosion of the bedrock by material

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Freeze Thaw Weathering

Expansion and contraction of rocks causes rock fracture due to:

  • Pressure release
  • Exfoliation
  • Dilatation
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Frost Heave

Water freezes in soil and is pushed up to the surface and causes a churning action

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Geliturbation / Congeliturbation

Other terms for Frost Heave

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Freeze Thaw

Flucuation around 0 degrees and cause the splitting of rocks: congelifraction

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Nivation

Freeze thaw weathering under a snow bank

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Ice lensing

Growth of ice crystals in soil

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Solifluction

Flowing soil (like soil creep)

Water freezes in the soil and segregates soil particles

Cannot infiltrate permafrost and travels over the surface

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Chemical Weathering - Carbonation

Weathering in which calcium carbonate reacts with acid water to become soluble and be removed

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Chemical Weathering - Hydrolysis

Water reacts with feldspars to produce clay minerals

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