Paleocene

This term is a specialized geological designation used primarily in stratigraphy and paleontology. It carries a neutral, scientific register and is almost exclusively found in academic papers, textbooks, or museum exhibits regarding Earth's history.

As a proper noun referring to a specific epoch, it is typically capitalized. When used as an adjective, it functions as a classifier to specify the time period of a fossil or rock layer, similar to how "Jurassic" or "Triassic" are employed.