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In order to calibrate radiometric dating methods, the methods need to be checked for accuracy against items with independently-known dates.

In order to calibrate radiometric dating methods, the methods need to be checked for accuracy against items with independently-known dates.

This is a problem because most of the dates of artifacts are only known from radiometric dating methods.

 

1. Eruption of Mt. TOBA dated to 70000 BC via radiometric dating matches ash layer in ice dated by the depth at which ash was found which also corelates to a genetic bottle neck found in human DNA which dates to around 70000BC via genetic drift.

 

2. Independent radiometric dating methods may be used to cross-check each other; K-Ar can be used to verify the result from U-Th to ensure Parent-Daughter assumptions were correct.

Carbon dating, with it's much lower maximum theoretical range, is often used for dating items only hundreds and thousands of years old, so can be calibrated in its lower ranges by comparing results with artifacts who's ages are known from historical records.

Carbon dating, with it's much lower maximum theoretical range, is often used for dating items only hundreds and thousands of years old, so can be calibrated in its lower ranges by comparing results with artifacts who's ages are known from historical records.

Otherwise, calibration consists of comparing results with ages determined by other radiometric dating methods.

Otherwise, calibration consists of comparing results with ages determined by other radiometric dating methods.

However, tests of radiometric dating methods have often shown that they do ''not'' agree with known ages of rocks that have been seen to form from volcanic eruptions in recent and historic times, and there are also examples of radiometric dating methods not agreeing with each other.

However, tests of radiometric dating methods have often shown that they do ''not'' agree with known ages of rocks that have been seen to form from volcanic eruptions in recent and historic times, while there are a few examples of radiometric dating methods not agreeing with each other, the vast majority of dating results are accurate within the margin of error for that method.<ref>addref</ref> www.nature.com

Young-Earth creationists therefore claim that radiometric dating methods are not reliable and can therefore not be used to disprove Biblical chronology.

Young-Earth creationists therefore claim that radiometric dating methods are not reliable and can therefore not be used to disprove Biblical chronology.