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Andre, 43, and Mac Donagh tied the knot back in July 2015, 18 months after Amelia’s birth, having dated since 2012.

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This belief in long ages for the earth and the existence of life is derived largely from radiometric dating.These long time periods are computed by measuring the ratio of daughter to parent substance in a rock and inferring an age based on this ratio.Radiometric dating is largely done on rock that has formed from solidified lava.

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The idea of isochrons is this: Suppose X is a parent element that decays in to Y and Z is another isotope of Y not produced by radioactive decay. Since Y and Z are isotopes, we would assume they have similar chemical properties.Here I want to concentrate on another source of error, namely, processes that take place within magma chambers.To me it has been a real eye opener to see all the processes that are taking place and their potential influence on radiometric dating.It follows that the ratios x/z and y/z have a linear relationship whose slope yields the age of the sample.If these ratios are observed to obey such a linear relationship in a series of rocks, then an age can be computed from them.Scientists typically determine the age of a rock or meteorite by using the isochron method.