(a)Block disintegration
(b)Occurs on rocks with joints and bedding planes found in areas with large diurnal range of temperature
During the day,the rocks are heated by the sun and expand
During the night,the temperature fall and the rocks are cooled as they contract.
Expansion and contraction causes stress mainly along the bedding/joints leading to formation of cracks
Continued process causes the enlargement of the cracks
The rock eventually breaks down into smaller blocks
isaacmuthini answered the question on November 16, 2017 at 13:32
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