GK
INDIAN GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Garhwal region
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Krishna Valley
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Dharwar-Bellang-Mysore
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Rajmahal Hills
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Detailed explanation-1: -The Dharwar rocks are rich in iron ore, manganese, lead, zinc, gold, silver etc. The Champions series containing gold mines lie within this system. This Champion system is named after the Champion reef in the Kolar Gold Fields. The Kolar Gold Fields contain one of the deepest gold mines of world.
Detailed explanation-2: -You can spot the Dharwar rocks in the Aravalli ranges, Balaghat, Rewa, Chotanagpur, Ladakh, Zaskar and Kumaun mountain ranges, Vaikrata range near Spiti valley, etc. Contains major metallic and non-metallic minerals: These rocks are the most economically essential rocks found in India.
Detailed explanation-3: -Tonalitic pebbles in conglomerates of the Dharwar Supergroup confirm the inference that the supracrustal rocks were deposited on a gneissic basement. Whole rock Rb-Sr ages of gneisses showing only the DhF1 structures fall in the range of 3100–3200 Ma.