[ RadSafe ] 4.4 billion year old crystal

Jim Darrough darrougj at onid.orst.edu
Thu Feb 27 12:04:37 CST 2014

Or check with Dr. Tim Becker at the Berkeley Geochronology Center. He is a
recognized expert in the subject.

Jim Darrough

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Philip Simpson
Sent: Thursday, February 27, 2014 9:33 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] 4.4 billion year old crystal


The a web search of the general term "geochronology" will give you links to
more information about dating rocks than you probably ever wanted.

Phil Simpson
Assistant Reactor Manager (Retired)
University of Michigan
Ford Nuclear Reactor

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