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International Relations·Easy

With reference to the desert region of India, which of the following statements is/are correct? 1. Chemical weathering is the most active degradation process in this region. 2. The region was submerged under sea at the time when dinosaurs existed on earth. 3. The underlying rock structure of the desert is same as that of the Indo- Gangetic Basin Select the correct answer using the code given below:

With reference to the desert region of India, which of the following statements is/are correct?

1. Chemical weathering is the most active degradation process in this region.

2. The region was submerged under sea at the time when dinosaurs existed on earth.

3. The underlying rock structure of the desert is same as that of the Indo- Gangetic Basin

Select the correct answer using the code given below:

Options

  1. a.

    2 only

    Correct answer
  2. b.

    1 and 3 only

  3. c.

    1 and 2 only

  4. d.

    1, 2 and 3

Explanation

  • For chemical weathering to be active, there is a need of hot and humid conditions. Since the average rainfall is less than 15 cm, the dominant form of weathering is physical.
  • It is believed that during the Mesozoic era, this region was under the sea. This can be corroborated by the evidence available at wood fossils park at Aaka land marine deposits around Brahmsar, near Jaisalmer (The approximate age of the wood-fossils is estimated to be 180 million years), and we know that dinosaurs existed on the planet during Mesozoic.
  • The underlying rock structure of the desert is an extension of the Peninsular plateau.

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