Why is radiometric dating unreliable

why is radiometric dating unreliable

Lead could easily reside in impurities and imperfections in the crystal structure. The crucial determiners are therefore volcanic extrusive igneous rocks that are interbedded with sediments, and intrusive igneous rocks that penetrate sediments. These cool more slowly and have larger crystals, often forming granite. Yes, there are other issues at play as is the case with any over-arching scientific ideabut to her, radiometric dating is the most important reason she believes in an old earth. In fact, it probably rises to the top of the magma, artificially increasing its concentration there.

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The Cambrian period is conventionally assumed to have begun about million years ago.

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Radiometric dating

Jelsma; P. While uranium is water-soluble, thorium and protactinium are not, and so they are selectively precipitated into ocean-floor sedimentsfrom which their ratios are measured. However, it would be better to date all five craters by all four different methods, and see what the agreement is. If P1 is increased, it will make the age smaller.

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