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11 Cards in this Set
- Front
- Back
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Hadean era
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4.6-3.8 billion years ago
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Archean era
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3.8-2.5 billion years ago
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Proterozoic era
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2.5 billion years ago - 542 million years ago
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Paleozoic era
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542-251 million years ago
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Mesozoic era
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251-65.5 million years ago
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Cenozoic era
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65.5 million years ago - present
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In which eras was the atmosphere still reducing? (Pre-oxidizing atmosphere)
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Hadean and Archean
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About when was the Permian Extinction?
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End of Paleozoic
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About when was the Extinction Event (meteorite)?
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End of Mesozoic
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What are the 6 sub-periods of the Paleozoic era?
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Cambrian, Ordovician, Silurian, Devonian, Carboniforous (Miss. and Penn.), and Permian
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What are the 3 sub-periods of the Mesozoic era?
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Triassic, Jurassic, & Cretaceous
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