Question

Indian sub continent witness broadly

Answer 1

Answer:

The Indian Subcontinent constitutes a distinctive geographic entity that can be divided into three geomorphic provinces: (a) the Indian Peninsula, (b) the Himalayas, and (c) the Indo-Gangetic Alluvial Plains. The Indian Peninsula is a triangular-shaped landscape of ancient landmass with record of a prolonged history of erosion, denudation, and resurgent tectonic activities. The present-day geomorphic characteristics of the entire terrain have resulted because of more recent block uplift-type tectonic activities. Evidence of ancient gently rolling, almost featureless ‘peneplain’ surfaces marking the top of upland areas like plateaus and mountains provides proofs of a prolonged period of denudation reaching the base level of erosion much before its elevation to the mountainous height. The Indo-Gangetic Alluvial Plains are the youngest geomorphic unit that evolved as a foreland basin in the frontal region of the rising Himalayas. The Himalayan mountain range is divided axially into six morphotectonic units, each showing a distinctive lithostratigraphic, tectonic, and geomorphic (mainly topographic) characteristics and evolutionary history. The geophysical characteristics of the Indian Subcontinent provide clear evidences of reconstitution of the Indian Shield simultaneously with the pruning of the pristine Precambrian Indian Shield with the formation of the present-day Indian Subcontinent.

Explanation:

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