Granite Tors

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Formation of granite tors (diagram)

Stage 1:

  • Soil
  • horizontal cracks caused by pressure release
  • zone of widely spaced joints

Stage 2: Deep chemical weathering under warm & wet conditions

  • weathered granite
  • zone of widely spaced joints weathered less rapidly

Stage 3:

  • tor
  • weathered granite removed by freeze-thaw, surface exposed
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