The top documents tagged [end of precambrian era]

The Earth is 4.6 Billion years old This has been broken down into 4 major time periods (Eras). This has been broken down into 4 major time periods (Eras).

The Earth is 4.6 Billion years old This has been broken down into 4 major time periods (Eras). This has been broken down into 4 major time periods (Eras).

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