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At the same time, percolating ground water deposits trace amounts of fluorine and other elements, such as uranium, into the bone.
As a result, the amount of fluorine Fluorine analysis can be used only as a relative dating method because the rate of decay and the amount of dissolved minerals in the ground water varies from site to site.
Their bones also were frequently found in association with our human and primate ancestors.
In the past, relative dating methods often were the only ones available to paleoanthropologists.
As a result, it was difficult to chronologically compare fossils from different parts of the world.
However, the assumption of contemporaneity may not always be correct.
This is due to the fact that one or both of the objects may have been moved or redeposited into a different location.It contained tools and chemicals that could have been used to modify the ape jaw and human skull to give them the appearance of great antiquity.