Assumptions used in radiometric dating

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(the same) size, then it can be safely assumed that the half-life of that decay is a constant.

by Tas Walker A geologist works out the relative age of a rock by carefully studying where the rock is found in the field.

In many cases, there are independent cues (such as geologic setting or the chemistry of the specimen) which can suggest that such assumptions are entirely reasonable.However, the methods must be used with care -- and one should be cautious about investing much confidence in the resulting age...especially in absence of cross-checks by different methods, or if presented without sufficient information to judge the context in which it was obtained.The topic of radiometric dating has received some of the most vicious attacks by young earth creation science theorists.However, none of the criticisms of young earth creationists have any scientific merit.The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.

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