With reference to the physiographic sub-divisions of Peninsular India, which of the following statements accurately explains the geological origin and structural nature of the Western Ghats?
- They form the faulted and eroded western edge (escarpment) of the Peninsular plateau, created during the subsidence of the landmass into the Arabian Sea.Cevap
- BThey are tectonic fold mountains formed simultaneously with the Himalayas during the Indo-Eurasian continental collision.
- CThey represent a continuous chain of isolated volcanic cones created during the recent Quaternary volcanic activity.
- DThey are relict residual mountains formed entirely by wind deposition over ancient alluvial plains.
Cevap
The statement explaining that the Western Ghats form the faulted and eroded western edge (escarpment) of the Peninsular plateau, created during the subsidence of the landmass into the Arabian Sea.
Geologically, the Western Ghats (Sahyadris) are not true mountain ranges formed by crustal folding. Instead, they are the steep western cliff edge (escarpment) of the Peninsular Plateau. They were formed during the breakup of Gondwanaland when the western part of the plateau faulted and submerged beneath the Arabian Sea, creating a high continuous relief wall facing the western coast.
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Anahtar Kavram
Geological origin and structural relief characteristics of the Western Ghats escarpment.