what is the geological history of indian sub continent
Answers
Answer:
The Indian subcontinent drifted northeastwards, colliding with the Eurasian plate nearly 55 million years ago, towards the end of Paleocene. This geological region largely includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka.
Countries: Bangladesh; Bhutan; India; Maldives; Nepal; Pakistan; Sri Lanka
Area: 4.4 million km2 (1.7 million sq mi)
Population: 1.710 billion (2015)
Explanation:
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Answer:
Geologically, the subcontinent of India was a part of the Gondwanaland (the Southern Continent). The geological history of India is described in the below sections:
Archaen Formation (Pre Cambrian)
87% of the Earth's history is of this period (4.6 billion years ago till 570 million years ago). Archean means "oldest rocks of the Earth's crust". This period saw the development of the Earth's atmosphere, the first photosynthesis, first chemosynthesis and formation of the life supporting atmosphere. Throughout the world the rocks of this period are called as "Fundamental Geinesses" OR "Basement complex". They are devoid of any form of life or sediment and form the core of all great fold mountain ranges of the world.The Archaean rocks are the repo sitories of the mineral wealth of India. These rocks are rich in ferrous and non-ferrous minerals Like iron ore, copper, manganese, mica, dolomite, lead, zinc, silver and gold. The Archaean rocks cover two-thirds of Peninsular India. In the Peninsular region, the Archaean rocks are known to be of three well-defined types:
The Bengal Gneiss
The bengal gneiss is highly foliated.
It occurs mostly in the eastern ghats
The Bundellkhand Gneiss
It is coarse grained in structure and found mostly in southern India.
It occurs mostly in Bundelkhand (UP), Baghelkhand (MP), Maharashtra, Rajasthan
The Nilgiri Gneiss
It is criss crossed and has quartz veins and is mostly like a granite.