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.For example, if the cultural contents of the lower deposit are Mauryan in character, appropriately this deposit may be assigned a date between 400-200 B. Similarly, if the cultural equipment of the upper deposit are of the Sunga period, this deposit has to placed between 200-73 B. Quite often, the archaeologist decided the change of stratum on the basis of the feed of the deposit.
Association in simplicity can be illustrated by an example, at the port of Arikamedu near Pondicherry.
Antiquities and potteries of Roman origin were found in association with the finds of Indian origin.
According to him a period of hundred years may be granted for the accumulation of a deposit of one and a half feet.
However this formula has not been accepted by many archaeologists.
When combined with other types of archaeological evidence - such as settlements or field systems, pollen evidence can be extremely informative.
This dating method is also known as Archaeological Dating or Historical Chronology. These methods were relied on especially prior to the introduction of scientific methods of dating.
Pollen analysis, or Palynology, is a type of environmental archaeology in which microscopes are used to analyse the range of plant pollens present in archaeological layers: these can tell us what crops, vegetation or ground cover were likely to have been present when a layer was deposited.
Pollen is part of the reproductive system of plants - tiny grains are discharged like dust from the male plant and rely on wind and insects to be transported to female plants.
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.
According to this method, the upper deposits are younger and the lower deposits are older.