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This channel provides notes from different major books like D.R. khullar, G.C leong etc

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GRANULAR DISINTEGRATION

#Geomporphology #Earthmovements

◇ Granular disintegration happens in rocks composed of different types of coarse-grained minerals.

Dark-coloured minerals absorb more heat than the light-coloured minerals.

◇ This leads to differential expansion and contraction of mineral grains resulting in grain by grain separation from the rock.

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FROST WEATHERING

#Geomporphology #Earthmovements

◇ During the warm season, the water penetrates the pore spaces or fractures in rocks. During the cold season, the water freezes into ice, and its volume expands as a result.

◇ This exerts tremendous pressure on rock walls to tear apart even where the rocks are massive.

◇ Frost weathering is the collective name for several processes where ice is present. These processes include frost shattering, frost-wedging and freeze-thaw weathering.

Frost weathering

Freeze wedging is caused by the repeated freeze-thaw cycle. Cracks filled with water are forced further apart with subsequent freezing and thawing.

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