Paleocene
- Scope note
- On the geologic time scale, oldest of five epochs of the Tertiary period, or the last of the more recently designated Paleogene period of the Cenozoic era. The Paleocene extends from about 65 million to 55 million years ago. It followed the Cretaceous period and preceded the Eocene epoch. It is marked by the rapid proliferation and evolution of mammals, including the first primates, and by the formation of the Rocky Mountains.
- Date of creation: 10-Feb-2025
Accepted term: 10-Feb-2025