The Brahmaputra, Irrawady and Mekong rivers originate in Tibet and flow through narrow and parallel mountain ranges in their upper reaches. Of these rivers, Brahmaputra makes a “U” turn in its course to flow into India. This “U” turn is due to
Uplift of folded Himalayan series
Incorrect Answer Syntaxial bending of geologically young Himalayas
Correct Answer Geo-tectonic disturbance in the tertiary folded mountain chains
Incorrect Answer Both (a) and (b) above
Incorrect AnswerExplanation:
Before entering India, Brahmaputra takes a U turn in Nyangtri of Tibet. In that place the great Himalaya mountain system takes its syntaxial bend and turns southwards. As a result the river takes a 180 degree U turn and enters India through Upper Siang of Arunachal Pradesh. So, that Great Bend of Brahmaputra is a result of syntaxial band of eastern Himalayas.
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By: Ziyaur Rahman