In This was verified through the use of X-ray fluorescence examination.The skull and jaw clearly were not from the same time period.Their bones also were frequently found in association with our human and primate ancestors.can be used to tell us whether or not the animals they were from actually lived at about the same time.Scientists measure the proportion of carbon-14 left in the organism to determine its age.In the past, relative dating methods often were the only ones available to paleoanthropologists.However, we must be careful to note whether or not the fossil comes from the mixed strata zone of the filled in hole..
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.
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.