A site in India near the extinct Ghaggar/Hakra River with Early and Mature Harappan settlements. A Chalcolithic settlement similar to Kot Diji and the site underlying the Indus city at Harappa has given radiocarbon dates of c 2750 BC. An intact plowed field has been discovered, indicating that the plow was already in use before the main Harappan period. About 2450 a small town of the Indus civilization was built over it, which flourished to c 2150 BC. In the Mature Harappan period, the site consisted of a citadel and a lower town, both defended, and laid out, in the normal Indus Valley grid pattern.