Potassium-Argon dating has the advantage that the argon is an inert gas that does not react chemically and would not be expected to be included in the solidification of a rock, so any found inside a rock is very likely the result of radioactive decay of potassium.

What type of rock makes the best sample for the K Ar dating method?

In order to use the K-Ar dating technique, we need to have an igneous or metamorphic rock that includes a potassium-bearing mineral. One good example is granite, which normally has some potassium feldspar (Figure 8.15). Feldspar does not have any argon in it when it forms.

What is Radiopotassium dating used for?

The radiopotassium dating technique is applied to quizlet Start studying dating methods, geologic time to build chronologies of trees as a man. Ft dating methods in order to date the use of radioactive argon gas.