Weathering processes in glacial environments

Description

A-Levels Glaciation Mind Map on Weathering processes in glacial environments, created by EmmaSmile on 06/05/2013.
EmmaSmile
Mind Map by EmmaSmile, updated more than 1 year ago
EmmaSmile
Created by EmmaSmile over 11 years ago
49
0

Resource summary

Weathering processes in glacial environments
  1. Frost shattering
    1. Occurs when temperatures fluctuate, rising during day but dropping below freezing at night
      1. Water enters cracks in rocks and freezes overnight - expanding by volume of 10% exerting pressure on crack
        1. As this process continues, cracks widen and eventually pieces of rock break off. Weathering process important as helps produce some of debris used in abrasion.
    2. Dilation
      1. When overlying pressure is released, such as when a glacier begins to melt and loses weight, underlying rock expands (Dilates) and fractures; joints created and existing joints in rock are enlarged. This enables glacial erosion to be more effective.
      Show full summary Hide full summary

      Similar

      The global distribution of cold environments
      EmmaSmile
      Glacial erosional landforms
      EmmaSmile
      Glacial erosion landforms
      EmmaSmile
      Glaciation
      Reviser11
      Cold glaciers
      EmmaSmile
      The glacier system
      EmmaSmile
      Temperate Glaciers
      EmmaSmile
      Glacial erosion processes
      EmmaSmile
      Different rates of flow in glaciers
      EmmaSmile
      Glaciation
      jempgladys
      Glaciation
      laura southwell