Relative dating methods in archaeology texas accommodating lens
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.However this formula has not been accepted by many archaeologists.Further this formula has been disproved on many occasions. Pottery is probably the most abundantly available antique material in any archaeological site.Whenever and where ever such antiquities are found, associated finds are automatically dated.For example Mauryan terracottas, Roman amphorae, Harappan pottery, NBP , PGW,etc.
Modern C-14 emits about 15 counts per minute per gram, whereas Carbon-14 which is 5700 years old, emits about 7.5 counts per minute per gram.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.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.
Astronomical data have been applied in the study of geological ice ages by calculating the curves for major fluctuation of solar radiation.