Era
From Palaeos.org
| Geological timescale |
| Eon | Era | Period | Epoch | Age |
An era is a division of geological time (the corresponding division of the geological column - of rock layers - is an erathem) smaller than an eon and larger than a period. An example is the Paleozoic era that is part of the Phanerozoic eon and includes periods like the Cambrian, Ordovician, and so on.
