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The open joints are gradually enlarged due to ___________

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The open joints are gradually enlarged due to ___________

(a) Rains

(b) Winds

(c) Weathering

(d) Sunlight

I had been asked this question during a job interview.

This is a very interesting question from Joints Terminology in portion Joints and Jointing of Engineering Geology

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Right answer is (c) Weathering

The best explanation: Open joints are those in which the blocks have been separated or opened up for small distances in a direction at right angles to the fracture surface. These may be gradually enlarged by weathering processes and develop fissures in the rocks.

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