[meteorite-list] Shocked Quartz Found at Upheaval Dome, Utah

From: Ted Bunch <tbear1_at_meteoritecentral.com>
Date: Mon, 24 Mar 2008 10:28:15 -0700
Message-ID: <C40D32BF.57DA%tbear1_at_cableone.net>

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, "mmorgan at mhmeteorites.com" <mmorgan at mhmeteorites.com>
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 <bristolia at yahoo.com>
>
> Date: Mon, 24 Mar 2008 09:35:10
> To:meteorite-list at 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:

?In 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.?

http://www.gsajournals.org/perlserv/?request=get-abstract&doi=10.113
> 0%2FG24287A.1

Yours,

Paul H.







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Received on Mon 24 Mar 2008 01:28:15 PM PDT