Dating prehistoric objects
Antiquities and potteries of Roman origin were found in association with the finds of Indian origin.With the aid of these dated imports it was possible to date the associated Indian objects to the first two centuries A. Similarly NBP and PGW has helped in fixing the chronology of numerous sites. Sometimes dates are also obtained with the assistance of astronomy.In such cases subjective element cannot be ruled out.But, for a single culture site the method is quite reliable.The deposit thus occurring forms layers depending on the nature of the material brought in by the people inhabiting the area.
This parallelism is formed due to trade relations, particularly wehen trade followed in both directions.For example, beads closely resembling those from the temple repositories at Cnoss and dating from C.1600 B.C were found in a late context (Period V) at Harappa. By noting the association of these beads it has been possible to trace a archaeological datum line across Indian sub-continent and Mesopotamia.Clay tablets found in West Asia contain inscriptional evidence with regard to the occurrence of a solar eclipse.Specialists in the field of astronomical research placed this solar eclipse as on 15 June 763 B. The Almanac belonging to Maya culture of Central America helped in dating several important sites accurately on the basis of astronomy.