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That’s just over half a percent error in something that is supposedly multiple billions of years old.Of course, that error estimate is complete nonsense.The isochron is supposed to take care of such issues.Essentially, rather than looking at the amounts of Rb-87 and Sr-87, we look at their compared to Sr-86.As I have stated previously, we just don’t know a lot about radioactive decay.Certainly not enough to justify the incredibly unscientific extrapolation necessary in an old-earth framework.Sr-86 diffuses more quickly than Sr-87, and that has never been taken into account when isochrons are analyzed. Perhaps, but it’s rather tricky, because the rate of diffusion depends on the specific chemical and physical environment of each individual rock.

Generally, we are told that scientists have ways to analyze the object they are dating so as to eliminate the uncertainties due to unknown processes that occurred in the past. Hayes has pointed out a problem with isochrons that has, until now, not been considered.

The ratio of Sr-87 to Sr-86 is graphed versus the ratio of Rb-87 to Sr-86 for several different parts of the rock. Sr-86 is another stable form of strontium, but it isn’t produced by radioactive decay.

Thus, it provides an independent analysis of the rock that does not depend on the radioactive decay that is being studied.

The amount of Sr-87 that was already in the rock when it formed, for example, should be proportional to the amount of Sr-86 that is currently there.

Since the data are divided by the amount of Sr-86, the initial amount of Sr-87 is cancelled out in the analysis.

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