[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Radiocarbon Dating



Haist, Brandon <brandonc@advant.com> wrote
>Yes, the before mentioned bood "The Handy Science Answer Book" says the use
>of elements are:
>
>Uranium-238 ~half life=4.5 billion years
>Uranium-235 ~half life=704 million years
>Thorium-232 ~half life=14 billion years
>Rubidium-87 ~half life=48.8 billion years
>Potassium-40 ~half life=1.25 billion years
>Samarium-147 ~half life=106 billion years
>These are said to be used in dating techniques of gas formation light
>emission (called thermoluminescence).
>
>What are some other forms of dating?

Fission tract dating
Optically stimulated phosphorescence
Phototransferred thermoluminescence
Electron spin resonance
Aminoacid recemization
Obsidian hydration
Fluorine, uranium & nitrogen (FUN) content of bone

See : Science-based dating in archaeology, by Aitken M J, Longman, London
1990, ISBN 0-582-49309-9 (paperback)

It actually describes all the dating methods available - well beyond the time
period associated with archaeology.

Gautam Majumdar                 gautam@majumdar.demon.co.uk