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The top documents tagged [rocksthe precambrian]
Chapter 8 Precambrian Earth and Life History—The Hadean and Archean -platforms and shield areas= together make craton -early planet: volcanic, toxic gases
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Chapter 8 Precambrian Earth and Life History—The Hadean and Archean
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Precambrian Earth and Life History. 88% of geologic time 88% of geologic time Precambrian Time Span The Precambrian lasted for more than 4 billion years!
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