Problems with radiogenic dating sites

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For example, dating living mollusks by the carbon-14 method often yields clearly errant results—for instance, finding the mollusks to be up to 2,300 years old (“Radiocarbon Dating: Fictitious Results With Mollusk Shells,” , Vol. Archaeologist John Mc Ray notes: “Unfortunately, several recent discoveries combine to indicate that carbon 14 is not as valuable as was once hoped: (1) radioactive carbon atoms may not have existed in the earth’s atmosphere before 2000 B.

C.; (2) the natural concentration of carbon 14 in the atmosphere has varied in certain periods, and (3) there is a high probability of sample contamination” ( , 1991, p. Recently a new method—accelerator mass spectrometry—has been used to date ancient items.

Yet we find that different methods can yield radically different results.

As explains: “Several methods have been devised for estimating the age of the earth and its layers of rocks.

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However, these dating methods have significant problems that can lead to serious errors of interpretation.One of the most popular dating methods, carbon-14 (14C), is used for dating plant or animal remains.The book explains the basis for this method: “Radiocarbon is continuously created in the atmosphere through bombardment of nitrogen-14 (14N) by neutrons created by cosmic radiation.These ‘ages’ are, of course, preposterous [since we know the rock formed recently]. Such examples serve to illustrate the fallibility of the dating methods on which many modern scientists rely so heavily.The fundamental dating assumption (‘no radiogenic argon was present when the rock formed’) is questioned by these data. Helens dacite argue that significant ‘excess argon’ was present when the lava solidified in 1986 … Helens dacite causes the more fundamental question to be asked—how accurate are K-Ar ‘ages’ from the many other phenocryst-containing lava flows worldwide?

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