Which is not an era of the Phanerozoic eon?

Mesozoic

Cenozoic

Paleozoic

Hadean

1 answer

The Hadean is not an era of the Phanerozoic eon. The Hadean is the earliest eon in Earth's history, preceding the Phanerozoic eon. The Phanerozoic eon consists of three eras: Paleozoic, Mesozoic, and Cenozoic.