Direct indirect dating archaeology
The deposit thus occurring forms layers depending on the nature of the material brought in by the people inhabiting the area.
Specimens of organic material which can yield good amount of carbon can be collected for C-14 dating.
For example charcoal, wood, shell, paper, leaves, cloth, animal hair, bone, pollen, tooth, iron, prehistoric soot from the ceiling of the caves practically any material containing some carbon can be subjected Bones are generally affected by ground water carbonates and are therefore least reliable for dating.
The types and forms or shape of these pots and also the antiquities under go evolutionary changes in cource of time, It is further assumed that all living animals derive body material from the plant kingdom, and also exhibit the same proportion of C-14 material.
Therefore as soon as the organism dies no further radiocarbon is added.
Quite convincing dates are sometimes arrived at by importing parallels from other contemporaneous cultures.
This parallelism is formed due to trade relations, particularly wehen trade followed in both directions.
Sir Flinders Petrie had worked out a formula for dating the finds on the basis of the thickness of the deposit.
According to him a period of hundred years may be granted for the accumulation of a deposit of one and a half feet.
Charred bones are better preserved and are therefore relatively more reliable.