Geography
Assertion (A): The forces of faulting lead to the formation of block mountains.
Reason (R): Block mountains are often separated by intervening basins called graben.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Earth's Landforms
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Answer
Both A and R are true but R does not explain A.
Explanation — The Assertion (A) is true because block mountains are formed by faulting (epeirogenic movements), where a block of land is uplifted between faults. The Reason (R) is also true, as block mountains are often separated by grabens (rift valleys). However, the presence of grabens does not explain the formation of block mountains.
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Related Questions
Mountains which are subjected to weathering and erosion for a long time are lowered down:
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- Relict mountains
- Intermontane plateaus
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- Old fold mountains : Urals, Aravalli
- Residual mountains : Nilgiri, Rajmahal Hills
- All of the above.
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