Radiometric dating evidence evolution mary murphy and nigel lythgoe dating

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And Carbon-14 has been detected in “ancient” fossils—supposedly up to hundreds of millions of years old—ever since the earliest days of radiocarbon dating. If radiocarbon lasts only a few hundred thousand years, why is it found in all the earth’s diamonds dated at billions of years old?

This range is lowered even more by the calculations of other reputable secular scientists, including Robert L.

In many cases, the daughter nuclide itself is radioactive, resulting in a decay chain, eventually ending with the formation of a stable (nonradioactive) daughter nuclide; each step in such a chain is characterized by a distinct half-life.

In these cases, usually the half-life of interest in radiometric dating is the longest one in the chain, which is the rate-limiting factor in the ultimate transformation of the radioactive nuclide into its stable daughter.

Isotopic systems that have been exploited for radiometric dating have half-lives ranging from only about 10 years (e.g., tritium) to over 100 billion years (e.g., samarium-147).

For most radioactive nuclides, the half-life depends solely on nuclear properties and is essentially a constant.

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And there is no way to prove that the decay rate was not different at some point in the past.While the moment in time at which a particular nucleus decays is unpredictable, a collection of atoms of a radioactive nuclide decays exponentially at a rate described by a parameter known as the half-life, usually given in units of years when discussing dating techniques.After one half-life has elapsed, one half of the atoms of the nuclide in question will have decayed into a "daughter" nuclide or decay product.Summary: To be considered credible, radiometric dating would have to be scientifically sound and consistently accurate.As we have just seen, however, it is riddled with scientific flaws and endless examples of inaccurate measurements.Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geologic time scale.

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