Discussion :: Political Geography
- A rift valley is formed mainly due to ________
A.
Forces of tension in the earth's crust |
B.
The subsidence of the floor of a river valley |
C.
The valley formed after the formation of fold mountains |
D.
The deepening of a valley by ice action |
Answer : Option B
Explanation :
A rift valley is formed mainly due to the subsidence of the floor of a river valley. A rift valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepened by the forces of erosion.
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