India, Aug. 10 -- It's from time immemorial that Gujarat has left an indelible mark on the different periods of Bharat, and across a wide spectrum of critical areas. Early human settlement in Gujarat has been traced to thousands of years, to the Stone Age - in the valleys of the Sabarmati and Mahi rivers in the eastern part of the state. The emergence of a historical record is linked with the spread of the Indus (Harappan) civilisation, which flourished in the 3rd and 2nd millennia BCE. Its centres have been found at Dholavira, Lothal, Rangpur, Amri, Lakhabaval, and Rozdi (mostly in the Kathiawar Peninsula). The excavation at Lothal shows that this region was an integral part of a flourishing Indus valley civilisation dating back to 3700 ...