NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Indian Geography Evolution
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Geological Time Scale with reference to India - 4 Eras & 10 Periods Explained
Geological Evolution
- PreCambrian (600 Million Years ago) : Archaean Gneissic and Granites. Igneous Activities, subsequent Metamorphism andfolding of the Arrival. Dharwarian Group (Bijawars) Igneous activities and intrusions.
- Cambrian. Calcareous and Arenaceous deposits (Cuddapah and Vindhvanbasins) . Gondwana system (carboniferous) permacarboniferous glaciation and extensive glaciofluvial deposition.
- MidMesozoic. Fracturing of Gondwanaland, further uplift of Vindhyan sediments formation of western ghats.
- Cretaceous. Lava flow and formation of Deccan Trap.
- Tertiary. Collision of the Indian plate with Eurasian plate leading to Himalayan orogeny.
- Oligocene. Himadri (Greater Himalayas) Rajmahal Garo gap or the Malda gap and upheaval of IndoGanga divide (Potwar Plateau) .
✍ Manishika