Question

Which of the following stratigraphic unit(s) of the Vindhyan Supergroup contain(s) commercially significant limestone deposit(s)?

• A. Bhander Formation
• B. Rewa Formation
• C. Kaimur Formation
• D. Rohtas Formation

Hint:

The Vindhyan Supergroup contains several limestone-rich formations, with the Bhander and Rohtas formations being the most commercially significant.

Answer 1

The Correct Option is A, D

The Vindhyan Supergroup is known for its vast limestone deposits, and several of its formations contain commercially significant limestone.
Step 1: Bhander Formation
The Bhander Formation of the Vindhyan Supergroup is well known for its high-quality limestone deposits, which are commercially significant. Therefore, option (A) is correct.
Step 2: Rewa Formation
While the Rewa Formation does have some limestone, it is not as commercially significant as the Bhander or Rohtas formations. Thus, option (B) is incorrect.
Step 3: Kaimur Formation
The Kaimur Formation does not contain significant limestone deposits compared to the Bhander or Rohtas formations. Therefore, option (C) is incorrect.
Step 4: Rohtas Formation
The Rohtas Formation also contains commercially significant limestone deposits, especially in certain parts of the Vindhyan region. Therefore, option (D) is correct.
Final Answer:
\[ \boxed{(A), (D)} \]