Black and white dating in the bible
It is also remarkable that we have a test for mixing, which is commonly cited in support of the accuracy of radiometric dating, but when it gives contrary results, it is simply ignored. It is possible that such isochrons are not often done. All that Dalrymple says is that his ages were all recomputed using the most accurate values of the constants.
Micas exclude strontium, so Rb-Sr dating can be used on micas to determine the length of time since the mica formed. This would seem to imply that the problem of radiometric dating has been solved, and that there are no anomalies. The rate of diffusion is proportional to the gradient of argon concentration, and increases rapidly with temperature. The same question could be asked in general of minerals that are thought to yield good dates.
Let's apply all known dating methods to Gi that are thought to apply to this kind of rock, and obtain ages from each one. Some fossils are found in Precambrian rocks, but most of them are found in Cambrian and later periods. Many ancient lava flows are relatively flat, in contrast to modern ones. Helens K-Ar dating, and historic lava flows and their excess argon.
Imagine a uranium nucleus forming by the fusion of smaller nucleii. Even the creationist accounts that I have read do not adequately treat these issues.
Now, igneous bodies can be of two types, extrusive and intrusive. This is formed when lava is sticky and bubbles of gas in it explode.
It would be difficult to measure the tiny changes in concentration that would suffice to make large changes in the radiometric ages over long time periods. So even if the crystal excludes the daughter element, it could be present in impurities. Thus the decreasing K-Ar ages would represent the passage of time, but not necessarily related to their absolute radiometric ages.
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