Potassium argon k ar dating Amateur sex chat forum
Then, in ANOTHER 1.3 billion years (2.6 total), the remaining half will decay.
Then, in ANOTHER 1.3 billion years (3.9 total), the remaining 1/4 will decay, and so on.
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A second problem is that for technical reasons, the measurement of argon and the measurement of potassium have to be made on two different samples, because each measurement requires the destruction of the sample.
If the mineral composition of the two sample is different, so that the sample for measuring the potassium is richer or poorer in potassium than the sample used for measuring the argon, then this will be a source of error.
(However, see the section below on the limitations of the method.) This suggests an obvious method of dating igneous rocks.
If we are right in thinking that there was no argon in the rock originally, then all the argon in it now must have been produced by the decay of Ar in them will be so small that it is below the ability of our instruments to measure, and a rock formed yesterday will look no different from a rock formed fifty thousand years ago.