Proterozoic

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Scope note
The period of Earth's history that began 2.5 billion years ago and ended 542.0 million years ago, following the Archean. In this period stable continents first appeared and began to accrete, and also the first abundant fossils of living organisms, mostly bacteria and archaeans, then eukaryotic cells.
Proterozoic
Accepted term: 29-Apr-2024