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

Narrower term/s

• Triassic
• Jurassic
• Cretaceous[+]
  • Early Cretaceous
  • Late Cretaceous

Anotations

Scope note:

The middle era of the Phanerozoic eon externding from about 251 to 65 million years ago. It follows the Paleozoic and precedes the Cenozoic. It is divided into the Triassic, Jurassic, and Cretaceous periods. The Mesozoic is popularly known as the age of the dinosaurs.