Matt - In a study we did several years ago, we found one shocked quartz grain per 7000-12000 grains in various sedimentary rocks and glacial tillites.
Ted On 3/24/08 9:51 AM, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > really makes me wonder how much shocked quartz could be found as "background". > I am not saying that about this study, but from a curiosity. > > Matt > ---------------------- > Matt Morgan > Mile High Meteorites > http://www.mhmeteorites.com > P.O. Box 151293 > Lakewood, CO 80215 USA > > -----Original Message----- > From: Paul <[EMAIL PROTECTED]> > > Date: Mon, 24 Mar 2008 09:35:10 > To:meteorite-list@meteoritecentral.com > Subject: [meteorite-list] Shocked Quartz Found at Upheaval Dome, Utah > > > Buchner, E., and T. Kenkmann, 2008, Upheaval Dome, Utah, USA: Impact origin > confirmed. Geology. vol.36, no. 3, pp. 227-230. In part, this abstract > stated: ³In this study, we document, for the first time, shocked quartz > grains from this crater in sandstones of the Jurassic Kayenta Formation. The > investigated grains contain multiple sets of decorated planar deformation > features. ... The shocked quartz grains were found in the periphery of the > central uplift in the northeastern sector of the crater, which most likely > represents the cross range crater > sector.² http://www.gsajournals.org/perlserv/?request=get-abstract&doi=10.113 > 0%2FG24287A.1 Yours, Paul H. > ______________________________________________________________________________ > ______ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. > Try it now. > http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __________________ > ____________________________ http://www.meteoritecentral.com Meteorite-list > mailing > list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listi > nfo/meteorite-list ______________________________________________ http://www.m > eteoritecentral.com Meteorite-list mailing > list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listi > nfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list