■ EXFOLIATION DUE TO THERMAL STREAS WEATHERING

#Geomporphology #Earthmovements

◇ Thermal stress weathering results from the subsequent expansion and contraction of rocks caused by diurnal and seasonal variations in the temperature.

◇ The surface layers of the rocks tend to expand more than the rock at depth, and this leads to peeling off of the surface layers (exfoliation).

◇ This process is most effective in dry climates and high elevations where diurnal temperature changes are drastic.

◇ Although temperature changes are the principal driver, moisture can enhance thermal expansion in rock.

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