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Difficulty: HardPhysiography and Relief Features of India

Consider the following statements regarding the physiographic features and relief structure of the Central Highlands and Peninsular Plateau of India:

1. The Satpura Range forms a structural horst (block mountain) bounded by the Narmada rift valley to the north and the Tapi rift valley to the south.
2. Mount Dhupgarh, the highest peak of the Satpura Range, is located on the Maikal Range.
3. The Rajmahal Hills, situated on the northeastern edge of the Peninsular Plateau, consist predominantly of basaltic lava trap formations.

Which of the statements given above are correct?

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

Answer

1 and 3 only
The correct response identifies that statements 1 and 3 are accurate. The Satpura mountain range acts as a horst bounded by the Narmada graben to the north and the Tapi graben to the south. Additionally, the Rajmahal Hills are composed of Jurassic volcanic basaltic lava formations on the northeastern rim of the Peninsular block. Statement 2 is false because Mount Dhupgarh is located on the Mahadeo Hills, not on the Maikal Range.

Step-by-Step Solution

1
Analyze Statement 1 regarding the tectonic nature of the Satpura Range.
Statement 1 is correct. The Satpura mountain system is a horst formed between two parallel structural rifts: the Narmada rift valley on the north and the Tapi rift valley on the south.
Faulting and crustal subsidence created parallel grabens on either side of the elevated Satpura block.
2
Analyze Statement 2 regarding the location of Mount Dhupgarh.
Statement 2 is incorrect. Mount Dhupgarh (1,350 m), the highest peak of the Satpura Range, is located on the Mahadeo Hills near Pachmarhi. The Maikal Range forms the eastern extremity of the Satpura system and culminates at the Amarkantak Plateau.
Confusing relief features across regional sub-ranges leads to misidentifying peak locations.
3
Analyze Statement 3 regarding the geological composition of the Rajmahal Hills.
Statement 3 is correct. The Rajmahal Hills represent an eastern projection of the Peninsular block and consist primarily of basaltic lava traps formed during Jurassic volcanic activity.
The Rajmahal Traps are continental flood basalts located on the northeastern edge of the Peninsular shield.

Key Concept

Relief features, tectonic horst structures, and hill ranges of the Peninsular Highlands
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Topics

Physiography and Relief Features of India

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