»  Geologic Time Scale

Geologic Time Scale

All fossils are studied within the context of Geologic Time. It is difficult for us to comprehend the some 4 million years that have transpired since the origin of the human species. Then consider that Tyrannosaurus rex became extinct 65 million years ago, while trilobites emerged more than 500 million years ago. This link displays the current Geologic Time Scale, which serves as a reference for study of the trilobites on this website.