Relative dating of fossils definition

However, we must be careful to note whether or not the fossil comes from the mixed strata zone of the filled in hole..

However, the assumption of contemporaneity may not always be correct.

These processes result in All of these processes confuse the stratigraphic record.By measuring the ratio of the amount of the original radioactive element to the daughter isotope, scientists can determine how many half-lives the element has undergone and from there can figure out the absolute age of the sample.The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.As a result, it was difficult to chronologically compare fossils from different parts of the world.However, relative methods are , which is that if there are layers of deposits, those laid down first will be on the bottom and those laid down last will be on the top. However, geological strata are not always found to be in a neat chronological order.