Range of potassium argon dating

10-Dec-2017 20:24

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As we pointed out in these two articles, radiometric dates are based on known rates of radioactivity, a phenomenon that is rooted in fundamental laws of physics and follows simple mathematical formulas.Dating schemes based on rates of radioactivity have been refined and scrutinized for several decades.Whenever possible we design an age study to take advantage of other ways of checking the reliability of the age measurements.The simplest means is to repeat the analytical measurements in order to check for laboratory errors.The slope of the line determines the date, and the closeness of fit is a measure of the statistical reliability of the resulting date.

Essentially all of these strongly favor an old Earth.The isochron techniques are partly based on this principle.The use of different dating methods on the same rock is an excellent way to check the accuracy of age results.The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.

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Radiometric dating is self-checking, because the data (after certain preliminary calculations are made) are fitted to a straight line (an "isochron") by means of standard linear regression methods of statistics.Another method is to make age measurements on several samples from the same rock unit.

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