Geological Regions
The geological regions broadly grouped into three regions : the Himalayas and their associated group of mountains ,the Indo- Ganga Plain and the Peninsular shield.
The Himalayan mountain belt to the north and the Naga- Lushai mountain in the east , are the regions of mountain- building movement were under marine conditions about 60 crore years ago. The Indo- Ganga plains are a great alluvial tract that separates the Peninsula in the south. The Peninsula is a region of relative stability and occasional seismic disturbances.
Highly metamorphosed rocks of the earliest periods , dating back as far as 380 crore years, occur in this peninsular area.
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