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  9. Q122

BPSC (Bihar PCS) 2023 · Question 122 of 150

Bihar's geographical structure consists of rock systems. Match the rock systems with their descriptions: a. Dharwar rock system b. Vindhyan rock system c. Quaternary rock system d. Tertiary rock system; 1. Created by rapid deposition of alluvium by Himalayan and Peninsular rivers 2. Can be found in the West Champaran district 3. Part of the oldest Archaean rock system 4. Sandstone, limestone, dolomite, quartzite and shale are the main constituents. Select the correct answer using the codes given below.

Bihar GK

  1. Aa-4, b-2, c-3, d-1
  2. Ba-3, b-4, c-1, d-2Correct
  3. Ca-1, b-3, c-2, d-4
  4. Da-2, b-3, c-4, d-1

Answer: B. a-3, b-4, c-1, d-2

Explanation

Dharwar–oldest Archaean (a-3), Vindhyan–sandstone/limestone etc. (b-4), Quaternary–alluvium (c-1), Tertiary–West Champaran (d-2).

Source: 69th BPSC Prelims 2023 (Set B)

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