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The top documents tagged [era of ancient life]
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Life and Geologic Time. Geologic Time Trilobites are small, hard-shelled organisms that crawled on the seafloor. They are considered to be index fossils
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{ The Geologic Time Scale. * Paleontologists have been able to divide Earth’s history into time units based on the life-forms that lived only during certain
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Basic Geo Review Words
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Course
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Geologic History of the Earth
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