The geographical structure of Bihar is made up of rock systems. Match the rock systems with their descriptions—
| Rock system | Description |
|---|---|
| A. Dharwar rock system | 1. Formed by rapid deposition of sediments by Himalayan and Peninsular rivers |
| B. Vindhyan rock system | 2. Can be found in West Champaran district |
| C. Quaternary rock system | 3. A part of the oldest Archean rock system |
| D. Tertiary rock system | 4. Sandstone, limestone, dolomite, quartzite and shale are the main components of this rock system |
Use the code given below and choose the correct answer (in the order A B C D):
- A4 2 3 1
- B3 4 1 2
- C1 3 2 4
- D2 3 4 1
Show answer and explanation
Correct answer: (b) 3 4 1 2
Explanation
The correct matching is as follows—
- Dharwar rock system — a part of the oldest Archean rock system
- Vindhyan rock system — sandstone, limestone, dolomite, quartzite and shale are the main components of the rock system
- Quaternary rock system — formed by rapid deposition of sediments by Himalayan and Peninsular rivers
- Tertiary rock system — can be found in West Champaran district