What are the the four main periods of time of Earth’s history from oldest to youngest?
1 Answer
Feb 28, 2016
The four main ERAS are, from oldest to youngest: PreCambrian, Palaeozoic, Mesozoic and Cenozoic. Periods are a finer subdivision in the geological time scale.
Explanation:
However, more recently the Pre-Cambrian Era has been subdivided into the Proterozoic, Archean and Hadean Eras.
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