This restriction extends to animals that consume seafood in their diet.
Early geologists, in the 1700s and 1800s, noticed how fossils seemed to occur in sequences: certain assemblages of fossils were always found below other assemblages. Since 1859, paleontologists, or fossil experts, have searched the world for fossils.
This was true at a regional, and even a global scale.
However, note that because of the " principle of cross-cutting relationships", careful examination of the contact between the cave infill and the surrounding rock will reveal the true relative age relationships, as will the "principle online dating forum of inclusion" if fragments of the surrounding rock are found. In order for a layer of material to be deposited, something has to be beneath it to support.
The question should be whether or not carbon-14 can be used to date any artifacts at all? There are a few categories of artifacts that can be dated using carbon-14; however, they cannot be more 50,000 years old.
Carbon-14 cannot be used to date biological artifacts of organisms that did not get their carbon dioxide from the air.
xx is xxxxxxxxx xx xxxxxxxxx the xxx xx x fossil or xxxxxxxxx xxxx xx xx unearthed, so xxxx further analysis xxx xx xxxxxxx xxx xxxxx on facts.