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Which of the following about Spheroidal weathering is not true?

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Which of the following about Spheroidal weathering is not true?

(a) It is a complex type of weathering

(b) Both mechanical and chemical weathering are believed to happen

(c) Formation of joints is involved

(d) Formation of joints is not involved

The question was posed to me in a job interview.

This question is from Geological Work of Atmosphere in chapter Geological Work of Natural Resources of Engineering Geology

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Correct answer is (d) Formation of joints is not involved

Explanation: Spheroidal weathering is a complex type of weathering observed in jointed rocks and characterized with the breaking of original rock mass into spheroidal blocks. Both mechanical and chemical weathering are believed to actively cooperate in causing spheroidal weathering. The original solid rock mass is split into small block masses by development of parallel joints.

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