It's important to remember that geological time is divided into eons, eras, periods, and epochs. Here's the breakdown:

* Eon: The largest division of geologic time.

* Era: A subdivision of an eon.

* Period: A subdivision of an era.

* Epoch: A subdivision of a period.

So, within the Phanerozoic Eon, which is the current eon, the Paleozoic Era comes second after the Precambrian.