Evolution of India Essay

1477 WordsJun 26, 20126 Pages
The present shape of India is the cumulative result of the geological evolution of millions of years. In order to understand the relief of India, it is necessary to have a brief geological background. India can be broadly divided into 3 divisions: (A) Peninsular Plateau (B) The Himalayas and the associated mountains (C) The Indus-Ganga-Brahamputra Plain. A brief description of the above will throw light on the changing evolutionary stages through which India of today has passed. (a) Peninsular plateau An almost Stable Block. This block raised more than 500 million years ago and since then it has never been submerged under ocean. It is a rigid and inflexible type of landmass. Many compression forces forced the Himalayas to be uplifted but these forces had little effect on this block. Only once did the organic forces raise a few parts of this block about 350-500 million years ago. In one such incident, the geosynclines! Sediment rose up to form the Ravalli Mountains and possibly the Vmdhyan Range. Another incidence took place in the same age when Nallarnalai Hills and Veliconda Hills were uplifted and arc found sprawling between the Krishna and the Penner rivers. Both of these are now in old stage with rounded tops and smoothened wavelikc form. Some people call the peninsular plateau a horst which is an uplifted block parallel to a fault. In fact it did not rise but appears uplifted because of the subsidence in the fault. The Effect of Tensional Forces. It also does not mean that it remained unaffected by the end genetic forces which produced tensional forces. This made some parts of the peninsular plateau rise but this had only marginal effect on the peninsula which remained more or less stable. These tensional forces, however, raised and rejuvenated some parts of the plateau. This is why some parts appear young in the otherwise old

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