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.

It is nearly always association with other phenomena that gives a first clue as to the use, the age and chronological attribution of a potential datum, but age at least may sometimes be inferred from position in a geological deposit or a layer of peat.

Once a type has been classified by the aid of its context further specimen of the same type, even when found in isolation, can be assigned their place in terms of dates.

But, even when the scientific methods of absolute dating are available, this method of dating has not lost its importance, as many a time we have to depend solely on relative dating.

Even when the absolute dates are available, we have to supplement the information with relative dating.

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.

Astronomical data have been applied in the study of geological ice ages by calculating the curves for major fluctuation of solar radiation.

The various methods of relative dating are; This method depends on the common observation that the height of the habitational area increases as the people continue to live at the same place.

The deposit thus occurring forms layers depending on the nature of the material brought in by the people inhabiting the area.

But, for a single culture site the method is quite reliable.

Quite convincing dates are sometimes arrived at by importing parallels from other contemporaneous cultures.

Two systems of archaeological dating are used: absolute and relative chronology.