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read Kyle Mc Elroy is a graduate student at the University of Iowa who has been working with the Science Booster Club program since the summer of 2015.

The simplest means is to repeat the analytical measurements in order to check for laboratory errors.

Another method is to make age measurements on several samples from the same rock unit.

Dating schemes based on rates of radioactivity have been refined and scrutinized for several decades.

The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.

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.

The slope of the line determines the date, and the closeness of fit is a measure of the statistical reliability of the resulting date.

Other objections raised by creationists are addressed in [Dalrymple2006a].

The overall reliability of radiometric dating was addressed in some detail in a recent book by Brent Dalrymple, a premier expert in the field. 80-81]: These methods provide valid age data in most instances, although there is a small percentage of instances in which even these generally reliable methods yield incorrect results.

Such failures may be due to laboratory errors (mistakes happen), unrecognized geologic factors (nature sometimes fools us), or misapplication of the techniques (no one is perfect).

Technical details on how these dates are calculated are given in Radiometric dating. As with any experimental procedure in any field of science, these measurements are subject to certain "glitches" and "anomalies," as noted in the literature.

Here is one example of an isochron, based on measurements of basaltic meteorites (in this case the resulting date is 4.4 billion years) [Basaltic1981, pg. Skeptics of old-earth geology make great hay of these examples.

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