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Unreliability of Radiometric Dating and Old Age of the Earth
These cool quickly and have small crystals and form basalt. 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.
Whatever is making some of these dates inaccurate could be making all of them inaccurate. Rubidium parent atoms can be leached out of the rock by water or volatilized by heat. The same applies to intrusions. It is not intended to be natural, but to demonstrate a mathematical fact.
It seems reasonable, then, that mixings may be affecting all Rb-Sr isochrons in igneous rock. Both of these tend on the average to have wide biostrategraphic limits, meaning that a large spread of ages will be regarded as non-anomalous. In general, older rocks should have more argon because they have been subject to more exposure to such argon, but their true age is not necessarily related to their K-Ar radiometric age. Many dates give values near the accepted ones.
If we assume the earth went through a catastrophe recently, then the crustal plates might have been agitated, permitting lava and argon to escape from the magma. In the first place, I am not primarily concerned with dating meteorites, or precambrian rocks. It is also possible that parent and daughter elements could be present in boundaries between regular crystal domains. Now, some claim is being made about these distributions.
In fact, the argon in the magma may well be even higher, as it may concentrate near the top. Argon diffuses from mineral to mineral with great ease. Thus the temperature does not have to be very high for argon to move through rock. Therefore, my main concern is with rocks of the Cambrian periods and later.
This would be less than one part in a trillion entering the rock each day, on the average. Since the magma generally has old radiometric ages, I don't see how we could have magma without Pb or Sr. But then it is claimed that we can detect leaching and heating.
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