Question

Distinguish between the following:

Block Disintegration and Exfoliation

Answer 1

Feature	Block Disintegration	Exfoliation
Definition	It is the breakdown of rocks into large blocks due to physical forces like temperature changes or freeze-thaw cycles.	It is the peeling off of outer layers of rock due to repeated expansion and contraction caused by temperature changes.
Process	Rocks break into large blocks as a result of tension or pressure.	Outer layers of rocks peel off in thin sheets due to thermal expansion and contraction.
Occurs Due To	Tension and stress, especially in areas with drastic temperature changes.	Frequent heating and cooling of the rock surface, causing expansion and contraction.
Common Rock Types	Common in rocks like granite, which have large cracks or joints.	Common in rocks like granite, which have a strong outer layer prone to peeling.
Result	The rock breaks into large fragments or blocks.	The outer layer of the rock peels off in thin sheets or layers.