Question

The lower blocks in Block Mountains are

(a) graben

(b) horsts

(c) glaciers

(d) none of these​

Answer 1

Answer:

(c) glaciers

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Answer 2

The correct answer is option (a) graben.

Explanation:

• The lower blocks in Block Mountains are Graben.
• Block mountains are created because of faulting on a large scale (when large areas or blocks of earth are broken and displaced vertically or horizontally).
• The uplifted blocks are termed as horsts, and the lowered blocks are called graben.
• A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward.
• Graben often occur side-by-side with horsts. Horst and graben structures indicate tensional forces and crustal stretching.