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Unformatted text preview: buried Index fossils Good index fossils are those derived from particular plant or animal species that were distributed widely over the earth but existed for a very limited period of time Easily identified/recognized, readily preserved Radioactive carbon dating (radiometric dating): capable of assigning more precise dates rather than relative ages The Geologic Time Scale (refer to Notes p.2) Phanerozoic Eon encompassed all that span of time from which fossil remains were known Precambrian Eon All of the relatively unfossiliferous rocks older than the Cambrian period...
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- Spring '11