Explanation:

The rock system of the country is divided into 4 major divisions:
•The Archean Rock System
•The Purana Rock System
•The Dravidian Rock System
•The Aryan Rock System
Archean system(4000-2500 million years old) Covers 2/3 part of Indian peninsula.Found in Andhra, telangana, Karnataka, Madhya Pradesh, Maharashtra, Rajasthan and parts of Meghalaya plateau.Rich in Ferrous and non-ferrous minerals like iron ore, copper, manganese, mica, dolomite, lead, zinc, silver and gold.
Dharwad system (2500- 1800 million years old)The system is well developed in Dharwar-Bellary-Mysore belt ofGold, Marble, Precious and semi-precious stones.Karnataka, Jharkhand (Ranchi-Hazaribagh), MP, Chattisgarh, Odisha and Aravalli belt between Jaipur and Palanpur in Rajasthan.
Purana Rocks (1400-600 million years) Cuddapah System Cuddapah and Kurnool dist. Andhra, Chattisgarh, Rajasthan and lesser Himalayas
Vindhyas
Vindhayan Mountain Range Diamond, Red sandstone, Construction stoneDravidian Rocks (600-300 million years)
Cambrian RocksNamed after Cambria, the latin name for Wales in Great Britain.They are best developed in North-West Himalayan region.They are fossiliferous sandstones underlain by clayey salt
Middle- Kashmir, Spiti Valley, Shimla and Himalayas
Lower- Pir Panjal trap, kumaun region
Limestone and dolomite. Anthracite coal is found.
Aryan Rocks
GondwanaOdisha, Bihar, Jharkhand, Andhra Pradesh, ChattisgarhGood Quality Coal ( Bituminous and Anthracite), iron, kaolin, fire clay, sandstone and grits.Deccan trap (Cretaceous) (146-65 million years)During this period, enormous quantity of basaltic lava was poured out to the surface assuming.Quartz, bauxite, Magnetite, agate and semi-precious stones
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