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Zorluk: OrtaPhysiography and Relief Features of India

Consider the following statements regarding the Purvanchal (Eastern Hills) physiographic region of India:

1. The Patkai Bum, Naga Hills, and Mizo Hills form part of the Purvanchal range aligned along India's eastern border.
2. Structurally, these hills are composed primarily of Pre-Cambrian plutonic granitic basement rocks.
3. The Manipur valley, surrounded by these hills, features an intermontane basin containing Loktak Lake with floating vegetation masses known as 'phumdis'.

Which of the statements given above is/are correct?

  1. 1 and 3 onlyCevap
  2. B
    1 and 2 only
  3. C
    2 and 3 only
  4. D
    1, 2 and 3

Cevap

Statements 1 and 3 are correct, while Statement 2 is incorrect.
The Purvanchal range comprises north-south aligned hill tracts including Patkai Bum, Naga Hills, Manipur Hills, and Mizo Hills. Geologically, these ranges are composed of Tertiary sedimentary rocks, mainly sandstones and shales. The central valley of Manipur is a structural intermontane basin hosting Loktak Lake, famed for floating vegetation masses called phumdis. Thus, the option identifying statements 1 and 3 as correct is accurate.

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1
Evaluate Statement 1 regarding the constituent hill ranges of Purvanchal.
Statement 1 is correct. The Purvanchal hill system includes northern ranges like Patkai Bum, Naga Hills, Manipur Hills, and Mizo (Lushai) Hills forming the border between India and Myanmar.
Geographical orientation and named sub-ranges accurately reflect the Purvanchal region.
2
Evaluate Statement 2 regarding geological rock composition.
Statement 2 is incorrect. The Purvanchal hills are composed of sedimentary rocks (predominantly sandstones, shales, and mudstones) formed during Tertiary fold movements, rather than Pre-Cambrian plutonic granite.
Tectonic folding of marine sedimentary strata created these ranges during Himalayan orogeny.
3
Evaluate Statement 3 regarding the Manipur basin and Loktak Lake.
Statement 3 is correct. The central valley of Manipur is a unique intermontane lacustrine basin holding Loktak Lake, renowned for floating biomass masses known as phumdis.
Physiographic drainage features of the Manipur hills include this distinct lacustrine basin.

Anahtar Kavram

Physiographic and Geological Characteristics of Purvanchal (Eastern Hills)
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Konular

Physiography and Relief Features of India

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