Hierarchy classification:

1. top of the aat hierarchies
2. Styles and Periods Facet
3. Styles and Periods (hierarchy name)
4. [styles, periods, and cultures by general era]
5. geologic time scale
6. Phanerozoic
7. Cenozoic
8. Quaternary

Anotations

Scope note:

On the geologic time scale the earlier and longer epoch of the Quaternary. The Pleistocene extends from about 1.8 million years ago to 10,000 BCE. It is best known as the time when Earth entered its most recent period of glaciation.