Relative dating methods anthropology
In This was verified through the use of X-ray fluorescence examination.
The skull and jaw clearly were not from the same time period.
Since these components contain nitrogen, there is a progressive loss of that element.
At the same time, percolating ground water deposits trace amounts of fluorine and other elements, such as uranium, into the bone.
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.
The jaw was likely to have come from a modern young adult orangutan.
It had been cleverly carved to fit the skull and stained to look ancient.
Scientists first developed absolute dating techniques at the end of the 19th century.
In addition, the associated bones from extinct animals had much older fluorine and nitrogen ratios than either the jaw or the human skull.
Unfortunately, by 195 Piltdown Man Hoax--an explanation of one of the greatest frauds in the history of science This link takes you to an audio file at an external website.
In many cases, however, it is possible to reconstruct the original sequence of strata so that they can be used for relative dating.
For instance, if we find a fossil bone below the strata 3 rock level shown above, we assume that the animal most likely lived at a time before that layer was formed.