[meteorite-list] Help with meteorwrong ID

From: Norman Lehrman <nlehrman_at_meteoritecentral.com>
Date: Sat Apr 9 02:45:12 2005
Message-ID: <20050409064509.53992.qmail_at_web81003.mail.yahoo.com>

Rob,

My guess is quartz-albite-epidote hornfels. It's hard
to tell from the photos, but the greens could include
some amphibole and chlorite as well as epidote. This
is a fairly common contact metamorphic rock, often
derived from a graywacke protolith. A second guess
would be an epidote-feldspar endoskarn.

For what it's worth,
Norm

(http://tektitesource.com )


--- "Matson, Robert" <ROBERT.D.MATSON_at_saic.com> wrote:
> Hi All,
>
> Continuing the mini-thread on extraterrestrial
> wannabes, I've uploaded
> some images of an achondrite meteorwrong that I
> found recently. (For
> the few list members that have already assisted me
> in identifying the
> rock in question, these images are slightly better
> quality):
>
>
http://members.cox.net/mojave_meteorites/Meteorwrong1.jpg
>
http://members.cox.net/mojave_meteorites/Meteorwrong2.jpg
>
http://members.cox.net/mojave_meteorites/Meteorwrong3.jpg
>
http://members.cox.net/mojave_meteorites/Meteorwrong4.jpg
>
http://members.cox.net/mojave_meteorites/Meteorwrong5.jpg
>
> The fourth image shows the windowed interior. I
> welcome any of our
> rock experts to offer opinions on probable ID --
> gabbro, black granite,
> diorite, etc. Specific gravity is ~3.0, and rock
> has no paramagnetism.
> I was able to scratch the black surface with a
> pocket-knife; haven't
> tried the white inclusions yet. No streak on a
> streak plate. --Rob
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Received on Sat 09 Apr 2005 02:45:09 AM PDT