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28-Jan-2018 08:01

Before radiometric dating it was difficult to determine the actual age of an object.Radiometric dating, based on known rates of decay of radioactive isotopes in objects, allows a specific age of an object to be determined to some degree of accuracy.Relative dating methods are used to determine only if one sample is older or younger than another.Absolute dating methods are used to determine an actual date in years for the age of an object.This method is based on the assumption (which nearly always holds true) that deeper layers of rock were deposited earlier in Earth's history, and thus are older than more shallow layers.

Two broad categories of classification methods are relative dating and absolute dating.Short Answer: Both relative dating and absolute dating are tools used to give temporal characteristics to a sequence of events.Both are attempting to get information on the history of events.According to the law of superposition, as long as an area remains undeformed by outside forces, the deeper you go down through the layers of rock, the older they are.

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So, if you know the ages of the layers in the parent and wall rocks, you can calculate the age of the layers in your subsided area or xenolith by matching them.This is a method that does not find the age in years but is an effective technique to compare the ages of two or more artifacts, rocks or even sites.