Question:
Which of the following are economically the most important rocks of India as they possess valuable minerals like high grade iron-ore, manganese, copper, lead, gold, etc?
Which of the following are economically the most important rocks of India as they possess valuable minerals like high grade iron-ore, manganese, copper, lead, gold, etc?
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Metallic minerals = Dharwar System; Coal = Gondwana System.
Updated On: May 21, 2026
- Cuddapah
- Gondwana
- Carboniferous
- Dharwar
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
The geological structure of India is divided into several rock systems, each characterized by specific mineral assemblages formed during different geological eras.
Step 1: Identifying the Dharwar System.
The Dharwar system belongs to the Archean era (approximately 2.5 to 4 billion years ago). These are highly metamorphosed sedimentary rocks. They are considered the "storehouse of minerals" in India.
Step 2: Mineral Wealth.
Dharwar rocks contain almost all the major metallic minerals:
• Iron-ore: High-grade hematite and magnetite (found in Karnataka, Odisha).
• Gold: The famous Kolar and Hutti gold fields are in Dharwar formations.
• Manganese, Copper, and Lead: Extensive deposits found in these schistose rocks.
Step 3: Comparing with Gondwana.
While Gondwana rocks are also economically vital, they are famous primarily for coal (98% of India's coal), whereas Dharwar rocks are the primary source for metallic ores.
Step 1: Identifying the Dharwar System.
The Dharwar system belongs to the Archean era (approximately 2.5 to 4 billion years ago). These are highly metamorphosed sedimentary rocks. They are considered the "storehouse of minerals" in India.
Step 2: Mineral Wealth.
Dharwar rocks contain almost all the major metallic minerals:
• Iron-ore: High-grade hematite and magnetite (found in Karnataka, Odisha).
• Gold: The famous Kolar and Hutti gold fields are in Dharwar formations.
• Manganese, Copper, and Lead: Extensive deposits found in these schistose rocks.
Step 3: Comparing with Gondwana.
While Gondwana rocks are also economically vital, they are famous primarily for coal (98% of India's coal), whereas Dharwar rocks are the primary source for metallic ores.
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