Or could it be that the radioisotopic chronometer was reset by the second mentioned shock event and the actual cosmic-ray exposure age is much younger? Von: "karmaka" <[email protected]> An: "met-list" <[email protected]> Betreff: [meteorite-list] Chelyabinsk - cosmic-ray exposure age Datum: Tue, 19 Mar 2013 16:56:40 +0100 Dear list members, according to ITAR-TASS the cosmic-ray exposure or ejection age of Chelyabinsk is reported to be 289 million years, which seems very, very high for a chondrite. Can this be? Are there other chondrites with such a high exposure age or is this a typo and it is rather 28.9 million years? http://translate.google.de/translate?sl=ru&tl=en&js=n&prev=_t&hl=de&ie=UTF-8&eotf=1&u=http%3A%2F%2Fwww.itar-tass.com%2Fc9%2F680067.html What do you think? Martin ---------------------------------------------------------------- Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
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