K ar dating example
Variations in this data may point to errors anywhere in the process, which is why all the steps of preparation are recorded in detail.KAr analyses cost several hundred dollars per sample and take a week or two.
The learning curve has been long and is far from over today.Young rocks have low levels of Ar, so as much as several kilograms may be needed.Rock samples are recorded, marked, sealed and kept free of contamination and excessive heat on the way to the lab.These steps help remove as much atmospheric Ar from the sample as possible before making the measurement.
K ar dating example comments 

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