Question

Which of the following stratigraphic units contain coal seams?

• A. Barakar Formation
• B. Lakadong Formation
• C. Pachmarhi Formation
• D. Panchet Formation

Answer 1

The Correct Option is A, B

The question asks which stratigraphic units contain coal seams, and we are given four options: Barakar Formation, Lakadong Formation, Pachmarhi Formation, and Panchet Formation. Understanding the geology and stratigraphy of India, particularly concerning coal deposits, requires recognizing which formations are known for containing coal.

Step-by-step Explanation:

1. Barakar Formation: The Barakar Formation is part of the Gondwana sequence, predominantly found in eastern and central India. This formation is well known for its extensive coal seams and is one of the most important coal-bearing formations in India.
2. Lakadong Formation: This formation is part of the Shillong Plateau and is also known to have coal deposits, specifically in the Meghalaya region. The presence of coal seams makes this formation significant in the context of coal mining.
3. Pachmarhi Formation: Primarily consisting of sedimentary rocks like sandstones, this formation does not typically contain coal seams as prominently as the Barakar or Lakadong formations.
4. Panchet Formation: This formation mostly comprises claystones and sandstones. Similar to the Pachmarhi Formation, it is not recognized for having significant coal seams.

Conclusion: Based on the explanation above, the stratigraphic units containing coal seams are the Barakar Formation and the Lakadong Formation. Neither the Pachmarhi Formation nor the Panchet Formation are known for significant coal deposits.