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The Evolution of Peninsular Drainage System

Posted on : 01 Feb 2020

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  • Three major geological events in the distant past have shaped the present drainage systems of Peninsular India:
  • Subsidence of the western flank of the Peninsula leading to its submergence below the sea during the early tertiary period. Generally, it has disturbed the symmetrical plan of the river on either side of the original watershed.
  • The upheaval of the Himalayas when the northern flank of the Peninsular block was subjected to subsidence and the consequent trough faulting. The Narmada and the Tapi flow in trough faults and fill the original cracks with their detritus materials. Hence, there is a lack of alluvial and deltaic deposits in these rivers.
  • Slight tilting of the Peninsular block from northwest to the south-eastern direction.
  • All the above events gave this orientation to the entire drainage system towards the Bay of Bengal during the same period.

Article Related Questions

  1. Which of the following is/are the reasons for the present shape of the Peninsular Drainage System in India
    1.Subsidence of the eastern flank of the Peninsula leading to its submergence below the sea during early tertiary period.
    2.The upheaval of the Himalayas when the northern flank of the Peninsular block was subjected to subsidence.
    3.Slight tilting of the Peninsular block from northwest to the south-eastern direction.
    Select the correct answer using the code given below:

  2. 1.1 only

    2.2 and 3 only

    3.1 and 3 only

    4.1, 2 and 3

    Right Ans : 2 and 3 only

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