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1. Proterozoic: The Proterozoic eon is an interval of geologic time of nearly 2 billion years extending from about 2500 million years ago (mya) to about 542 mya. The Proterozoic eon is framed at its earliest boundary by the end of the ... [100%] 2023-02-04
2. Proterozoic: Template:Proterozoic Infobox The Proterozoic (Template:PronEng) is a geological eon representing a period before the first abundant complex life on Earth. The Proterozoic Eon extended from 2500 Ma to 542.0 ± 1.0 Ma (million years ago), and is ... [100%] 2023-05-13 [Geological history of Earth] [Proterozoic]...
3. Proterozoic: The Proterozoic (IPA: /ˌproʊtərəˈzoʊɪk, prɒt-, -əroʊ-, -trə-, -troʊ-/) is a geological eon spanning the time interval from 2500 to 538.8 million years ago. It is the most recent part of the Precambrian "supereon". (Earth) [100%] 2024-01-02 [Proterozoic] [Precambrian geochronology]...