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To: Morpheus2009
The assumption is based on the radioisotopes becoming settled when the rock solidified, and assuming that there was a specific kind of composition that existed in the molten magma when the rock cooled.

Uranium decays through a series of transuranic elements on it's way to becoming lead. These transurnaics have varying half-lives and thus accumulate in the sample in predictable proportions according to the age of the sample. It is reasonable to believe that a specific sample may have formed with exactly the proportions of those elements required to present a false appearance of age. It is insanity to believe they all did.

20 posted on 11/29/2012 8:34:44 PM PST by tacticalogic ("Oh, bother!" said Pooh, as he chambered his last round.)
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To: tacticalogic

It is reasonable to believe that a specific sample may have formed with exactly the proportions of those elements required to present a false appearance of age. It is insanity to believe they all did.

I don’t doubt the validity of radioactive dating. I was more or less trying to explain where the explanation came from, or how it is derived. There was a part one to my statement in comment #17.


30 posted on 11/29/2012 8:48:40 PM PST by Morpheus2009
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