Types of relative dating methods
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.
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.
However, we must be careful to note whether or not the fossil comes from the mixed strata zone of the filled in hole..
We will never know whether he was really the perpetrator, but he is now the leading candidate.
Another candidate was a famous practical joker who lived near the Piltdown gravel deposit during the early 20th century.
In many cases, however, it is possible to reconstruct the original sequence of strata so that they can be used for relative dating.
The skull and jaw clearly were not from the same time period.
The jaw was likely to have come from a modern young adult orangutan.
In other words, the biochemical clock that this method relies on runs at a different rate in different environments.
Fluorine analysis is primarily used for verifying whether or not two fossils in the same strata at a site were in fact contemporaneous.