Potassium Lixiviation The transformation of 39K into 39Ar involves a neu- If the transformation occurs at the surface, under am- tron-proton reaction: The neutron emits an electron to become a proton. And actually, it'll already contain some amount of argon If you read further in my second potassium-argon dating page: For instance, I am told that there are sometimes found in the same level both "early" forms and "modern" forms of man.
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This page, Potassium-Argon Dating I, is dedicated to looking at the assumptions that are made in Potassium-Argon age determinations.
Potassium-argon (K-Ar) dating
Current time: By the time it has hardened into volcanic rock all of the argon will be gone. That gives us that number. The modern form is considered to have been buried much later in spite of the fact that the specimens are found in the same level. ISBN