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Removal of overburden causes ___________

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Removal of overburden causes ___________

(a) Expansion

(b) Contraction

(c) Shrinkage

(d) Rise

The question was asked in my homework.

My query is from Origin of Joints and Engineering Considerations topic in portion Joints and Jointing of Engineering Geology

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Correct option is (a) Expansion

Easiest explanation: Removal of overburden due to weathering or other processes of rock wasting may also cause expansion of the underlying rocks due to unloading. The previously loaded rocks get relaxed with the release of the forces.

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