MCQ
Q.
The oldest mountain range in India is the
Correct Answer: A
The correct answer is Aravali hills.
Key Points
- Aravalli:
- The Aravallis of Northwestern India is one of the oldest fold mountains of the world, now form residual mountains with an elevation of 300 m to 900 m.
- They stretch for a distance of 800 km from Himmatnagar in Gujarat to Delhi, spanning Haryana, Rajasthan, Gujarat, and Delhi, the 692 kilometers.
- The mountains are divided into two, main ranges - the Sambhar Sirohi Range and the Sambhar Khetri Range in Rajasthan, where their extension is about 560 km.
- The hidden limb of the Aravallis that extends from Delhi to Haridwar creates a divide between the drainage of rivers of the Ganga and the Indus.
- The Aravallis date back to millions of years when a pre-Indian sub-continent collided with the mainland Eurasian Plate.
- Carbon dating has shown that copper and other metals mined in the ranges date back to at least the 5th century BC.
- In fold mountains, rocks are formed primarily of the folded crust when two convergent plates move towards each other by the process called orogenic movement.
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