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I need this question answered in a paragraph formatted in APA with in line citations. I'd like the subject to be written about Trilobites.

Choose either a radiometric dating technique or an index (guide) fossil. Be sure to describe the elements used in the dating technique, the ages of rock for which it is useful and what rocks or minerals are involved. For the index fossil, describe the type of organism and the time period in which it lived (e.g. Cretaceous, 71-65 million years ago).

Pleas use two academic references.

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The uranium-lead radiometric dating technique is one of the most preferred dating methods for rocks and fossils. The radioactive isotope in the system is Uranium 238 while the daughter substance is Lead 206 (Dickin, 2012). This means that the technique depends on the two decay chains, that is, the uranium decay series from 238U to 206Pb, which has a half-life of 4.47 billion years and the actinium series that starts at 235U to 207Pb with a half-life of 710 million years (Dickin, 2012). In this case, the U to Pb decay occurs through a series of both Alpha and Beta decays in which 238U and the daughter nuclides pass through 8 complete alpha and 6 beta decay processes (Wingate, 2001)....

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