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Index fossils dating

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Evolutionary theory assumes that a particular creature evolved from its ancestors, lived successfully for a period, then became extinct as its descendants evolved better ways of surviving. However, no matter how accurate the measurements of chemicals in the rocks are, there is no way of calibrating a dating technique for supposedly pre-historic events. For example, if dinosaur fossils are found in a rock layer, the rocks are assumed to be at least 65 million years old. So if a radiometric dating result indicates an age of 40 million years, it is interpreted as representing, not the age of the rock, but a later geological process, such as disturbance, reworking or contamination. The fossils always trump the supposedly objective radiometric dating! The second assumption has two complementary parts.
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Dating Fossils – How Are Fossils Dated?

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List of index fossils - Wikipedia

This preview shows page 1 - 2 out of 5 pages. Subscribe to view the full document. I cannot even describe how much Course Hero helped me this summer. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero. Using Index Fossils. Uploaded By jasonav8.
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Index Fossils & Correlation Lab

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Carbon, Radiometric Dating and Index Fossils. Carbon dating is used to determine the age of biological artifacts up to 50, years old. This technique is widely used on recent artifacts, but educators and students alike should note that this technique will not work on older fossils like those of the dinosaurs alleged to be millions of years old. This technique is not restricted to bones; it can also be used on cloth, wood and plant fibers.
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