Which of the following coal-bearing rock systems in India accounts for more than 90% of the total coal reserves and production of the country?

💡 Solution & Explanation

The Gondwana rock system holds over ninety percent of India's total coal deposits, primarily consisting of bituminous coal located in ancient river valleys. In contrast, older formations like the Dharwar system are rich in metallic minerals such as iron ore rather than coal. Recognizing the geological distribution of mineral resources is vital for physical and economic geography questions in competitive assessments.