Which among the following are exogenic geomorphic processes?
(A) Weathering
(B) Diastrophism
(C) Erosion and deposition
(D) Mass movement
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A), (C) and (D) only
Geomorphic processes are of two kinds. Endogenic processes get their energy from inside the earth and build up the relief; exogenic processes get their energy from the atmosphere and the sun (with gravity) and wear the relief down.
(A) Weathering Correct. The breaking up of rocks in place by heat, frost, water and living things is driven by the weather, so it is exogenic.
(B) Diastrophism Incorrect. The folding, faulting and uplift of the crust are caused by forces inside the earth, so diastrophism is an endogenic process.
(C) Erosion and deposition Correct. Running water, glaciers, wind and waves carry rock material away and lay it down elsewhere, all on the earth’s surface.
(D) Mass movement Correct. Landslides, slumps and creep move weathered material down a slope under gravity, a surface process.