Question

How many epoch era and period are there in geological time scale?

Answer 1

Eons are divided into eras, which are in turn divided into periods, epochs and ages. The following four timelines show the geologic time scale. The first shows the entire time from the formation of the Earth to the present, but this gives little space for the most recent eon.

Answer 2

The further subdivision of the eras into 12 "periods" is based on identifiable but less profound changes in life-forms. In the most recent era, the Cenozoic, there is a further subdivision of time into epochs.

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