Multiple choice general knowledge

A rift valley is formed mainly due to

  1. The forces of tension in the earth?s crust

  2. The subsidence of the floor of a river valley

  3. The deepening of a valley by ice action

  4. The valley formed after the formation of fold mountains
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A Correct answer
Explanation

A rift valley is formed when the Earth's crust is pulled apart by tensional forces, causing a block of land to sink between two parallel faults. This process creates a valley with a flat floor and steep, straight sides. The East African Rift Valley and the Narmada Valley in India are classic examples. River subsidence, glacial erosion, and fold mountain formation create different types of valleys through different geological processes.

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