Department of Geology & Mining, Government of Tamil nadu
In Tamil Nadu, the Gondwana rocks occurs parallel to the east coast near Sivaganga in the Vaigai river valley, Sriperumbudur, Satyavedu, Conjeevaram, Chengalput in the Palar basin. The Palar basin formation made up of Silt and Sandstone containing fossils of Ptilophyllum and Foraminifera.
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