Indian geological back ground
Various parts of India are made up of rocks that come from all categories of several geologic periods. A few of the rocks are poorly malformed and metamorphosed. At the same time, other types of rocks are newly silted alluvial soils that are still to go through chemical and physical changes.
The present physical form of the Indian subcontinent is the result of a vast geological formation. India is mainly composed of three geological units:
(a) the peninsular plateaus
(b) the Himalayan mountains
(c) the Indo Gangetic plains