Geological eras can be divided into periods, epochs and ages.
The Precambrian.
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Eons, Eras,Epochs, and period
The Cambrian Period is divided into three eras: the Early Cambrian, Middle Cambrian, and Late Cambrian. These eras refer to different stages or time intervals within the Cambrian Period, which lasted from about 541 to 485 million years ago. Each era is characterized by different geological and biological events, including the diversification of early animal life.
The geological time scale is divided into: Eons (Such as the Proterozoic and the Phanerozoic) THEN Eras (Such as the Mesozoic and the Cenozoic) THEN Periods (Such as the Cretaceous and the Quaternary) THEN Series, alternatively Epoch (Such as the Pleistocene and the Holocene) THEN Stage (Such as the Campanian and the Tarantian)
Geological eras can be divided into periods, epochs and ages.
groups ()
eras
Periods are subdivisions of geological eras.
The geological time scale is the history of the earth. This is in the eras period and epochs.
The geological time scale is divided into: Eons (Such as the Proterozoic and the Phanerozoic) THEN Eras (Such as the Mesozoic and the Cenozoic) THEN Periods (Such as the Cretaceous and the Quaternary) THEN Series, alternatively Epoch (Such as the Pleistocene and the Holocene) THEN Stage (Such as the Campanian and the Tarantian)
Eras are based one the worldwide changes in types of fossils. Periods are based on types of life worldwide. The Cenozoic era is the geological time scale is divided into both periods and epoch.
periods
The longest periods of the geological time scale are eons. Each eon is divided into eras and each era is made up of periods, which are further divided into epochs. Each division ended when a significant geological event occurred, such as a major ice age ending or a meteor impact resulting in a mass extinction of animal life, etc.
The Precambrian.
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eras