Question

Arrange the following volcanics in the decreasing order of their age:
A. Panjal,
B. Dras,
C. Pitepani,
D. Malani. Choose the correct answer from the options given below:

• A. A, C, B, D
• B. C, D, A, B
• C. A, B, C, D
• D. B, C, D, A

Hint:

For age-order questions, decreasing order means oldest to youngest.

Answer 1

The Correct Option is B

Concept:
In geology, decreasing order of age means arranging from oldest to youngest.

Step 1: Identify the oldest volcanic unit.
Among the given volcanic units, Pitepani volcanics are older than the others. \[ \text{Oldest}=C \]

Step 2: Identify the next older unit.
Malani volcanics are Proterozoic and are older than Panjal and Dras volcanics. \[ \text{Second}=D \]

Step 3: Compare Panjal and Dras.
Panjal volcanics are older than Dras volcanics. \[ A>B \]

Step 4: Final decreasing order.
Therefore, from older to younger: \[ \text{Pitepani}>\text{Malani}>\text{Panjal}>\text{Dras} \] Using letters: \[ C>D>A>B \] \[ \therefore \text{Correct Answer is (B)} \]