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The argon that may either diffuse into the minerals or may be occluded within them is derived by outgassing of K-bearing minerals in the crust and mantle of the Earth.

What I am more interested in is the fossil-bearing geologic column of Cambrian and later age.

Steven Schimmrich's review of this study often concerns itself with John W's presentation of geologists explanation for anomalies, and not with the percentage of anomalies; the later is my main concern. As for K-Ar dating, here is a quote given above: Geologists also recognize that heating causes argon to leave minerals, and that dissolved argon in a mineral that does not escape will become incorporated into it, artificially increasing its K-Ar age.

My purpose is to show, through these resources that young-Earth creationist criticisms of radiometric dating are inadequate at best.

It is composed of little glass beads that come from volcanic ash.

This type of lava cools quickly, leaving little time for crystals to form, and forms basalt. It is possible that in some cases an isochron might be able to detect such initial argon 40, but this can only happen if the potassium concentration varies significantly within the sample.

Geologists explain the Kaupelehu date by the lava being cooled rapidly in deep ocean water and not being able to get rid of its enclosed argon.

For compositions exceeding the eutectoid level of about 0.

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