The talk.origins archive (http://rumba.ics.uci.edu:8080/) includes an
excellent discussion of isochron dating by Chris Stassen. Use your web
browser to access the talk.origins home page (URL above. Then select
the option which allows you to do keyword searches and search on "isochron".
I'd give an exact reference, except that the talk.origins server didn't
respond this morning when I tried it.
Bill Hamilton | Vehicle Systems Research
GM R&D Center | Warren, MI 48090-9055
810 986 1474 (voice) | 810 986 3003 (FAX)
hamilton@gmr.com