They are divisions of geologic time, based largely on the fossil record of organisms. Eras are longer subdivisions of time which are further subdivided into periods and epochs. For instance, we are currently in the Holocene epoch of the Quaternary Period, and the larger Cenozoic Era.
The Permian period is the last period of the Paleozoic era
Eon --> Era --> sub-Era --> Period We are currently in: * Phanerozoic Eon * Cenozoic Era * Tertiary sub-Era * Quaternary Period
the mesoproterozoic was an era itself not a period.
It really wasn't an era. An Era was a much longer period of time. It was called the "Jurassic Period".
It is the final period of the Mesozoic era.
The first period in the Paleozoic Era was the Cambrian.
The last period of the Cenozoic era is the Neogene period, which was preceded by the Paleogene period.
jurassic
Ther Permian was the last period of the Paleozoic era.
An epoch is smaller than an era or a period.
The current era is Cenozoic era. The preceding era was Mesozoic era. However if you are looking for periods in Cenozoic era, the current one is Neogene period, the preceding period was paleogene period.
There were three periods in the Mesozoic Era. The Triassic Period, the Jurassic period & the Cretaceous Period.