Paragraph on Dravidian Rock System (Palaeozoic) of India

Here is your paragraph on the Dravidian rock system (Palaeozoic) of India: The rocks of the Dravidian system came into being about 600-300 million years ago. Most rocks of this system are found in the Extra Peninsular region and they are conspicuous by their absence in the Peninsular India except for one or two small patches of lower Permian age [...]