How reliable is potassium argon dating
Different methods have their own limitations, especially with regard to the age range they can measure and the substances they can date.
A common problem with any dating method is that a sample may be contaminated with older or younger material and give a false age.
Sedimentary rocks are rarely useful for dating because they are made up of bits of older rocks.
Therefore we shall devote an entire chapter to a discussion of every significant method, used by scientists today, to date ancient substances.
The key is to measure an isotope that has had time to decay a measurable amount, but not so much as to only leave a trace remaining.
Given isotopes are useful for dating over a range from a fraction of their half life to about four or five times their half life.
183-221 of Origin of the Universe (Volume One of our three-volume Evolution Disproved Series).
Not included in this chapter are at least 62 statements by scientists.