[meteorite-list] Meteorite or Meteorwrong?

From: Michael Fowler <mqfowler_at_meteoritecentral.com>
Date: Wed, 20 May 2009 09:20:17 -0500
Message-ID: <CB1C380E-0FBB-4F50-A536-D84BDFD7A0A5_at_mac.com>

Most andesites have phenocrysts. This one doesn't. Still could be
andesite, but maybe not.

Mike Fowler
Chicago


> Mark B.>>I'd have to say andesite (definitely not granite). <<
>
> Well...after some page turning and googling etc, I have to now agree
> with
> Mark that this rock is probably some sort of andesite...and
> definitely not
> granite. I've never seen so many different rocks that I formerly
> simply
> referred to as granite. :O) I haven't found a totally matching photo
> of
> andesite to the photo eric referred to, but the literature gave me
> the impression
> that andesite is what he has or is at least a good guess.
> GeoZay
>
>> Looks like a fine grained basalt covered with desert varnish.
>>
>> I see no fusion crust (flow lines etc.) and no regamaglypts. In the
>> cut surface, no metal, no chondrules, and no heat affected zone.
>>
>> Mike Fowler
>> Chicago
Received on Wed 20 May 2009 10:20:17 AM PDT