[meteorite-list] Sand-crusted, polished OC slice

2007-02-28 Thread STARSANDSCOPES
Hi Mike,  This is Tom Phillips the micrograph guy.
 
About a year ago you posted the list about a NWA meteorite incrusted in  sand 
grains.  I have several small and one 7 kilo individuals that look to  have 
beautiful crust but are coated in grains of what looks like quartz.   It does 
not seem to prefer any side but rather seems to encircle it.
 
Did you find out any thing interesting in your query?  Thanks,  Tom
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[meteorite-list] Sand-crusted, polished OC slice

2006-01-20 Thread Beda Hofmann

Hello listmembers

From a donated collection I unpacked an unlabelled slice of an 
ordinary chondrite, with a very high quality polish. The meteorite is 
crusted with an up to 5 mm thick rind of sand grains, well rounded 
quartz mostly, cemented by oxides released from the meteorite. I 
assume that the slice was acquired more than 15 years ago, material 
looks as H4-5, W3. Does this sound familiar to anyone?


Thanky for any hints

Beda Hofmann



--

*
Dr. Beda Anton Hofmann
Curator, Earth Science Department
Natural History Museum Bern
Bernastrasse 15
CH-3005 Bern, Switzerland
Phone +41 31 350 72 40
FAX+41 31 350 74 99
e-mail [EMAIL PROTECTED]
http://www.nmbe.ch/
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Re: [meteorite-list] Sand-crusted, polished OC slice

2006-01-20 Thread Michael Farmer
Beda, I have seen a meteorite with a crust of sand from NWA that was some 
years ago, so I dont know which one it was. It was being sold in the USA.

Of course, some Oman meteorites exhibit the same thing.
Mike Farmer
- Original Message - 
From: Beda Hofmann [EMAIL PROTECTED]

To: meteorite-list@meteoritecentral.com
Sent: Friday, January 20, 2006 8:45 AM
Subject: [meteorite-list] Sand-crusted, polished OC slice



Hello listmembers

From a donated collection I unpacked an unlabelled slice of an ordinary 
chondrite, with a very high quality polish. The meteorite is crusted with 
an up to 5 mm thick rind of sand grains, well rounded quartz mostly, 
cemented by oxides released from the meteorite. I assume that the slice 
was acquired more than 15 years ago, material looks as H4-5, W3. Does this 
sound familiar to anyone?


Thanky for any hints

Beda Hofmann



--

*
Dr. Beda Anton Hofmann
Curator, Earth Science Department
Natural History Museum Bern
Bernastrasse 15
CH-3005 Bern, Switzerland
Phone +41 31 350 72 40
FAX+41 31 350 74 99
e-mail [EMAIL PROTECTED]
http://www.nmbe.ch/
*
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RE: [meteorite-list] Sand-crusted, polished OC slice

2006-01-20 Thread Anita D. Westlake

Whoever sent the gorgeous picture of earth (?) being pelted with meteorites,
please resend the link. I made it my background photo, but it was
accidentally erased this morning.
Thanks!

Anita



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