[meteorite-list] Gibeon: deformed etch pattern
From: Impactika_at_aol.com <Impactika_at_meteoritecentral.com>
Date: Thu Apr 22 10:02:30 2004 Message-ID: <132.ac7dcae.29c65fdd_at_aol.com> --part1_132.ac7dcae.29c65fdd_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/17/2002 6:16:05 AM Mountain Standard Time, bernd.pauli_at_lehrer1.rz.uni-karlsruhe.de writes: > vincent jacques wrote: > > > You can see a nice Gibeon shocked slice from my collection at > > > http://users.skynet.be/meteorite.be/Collection/gibeondeformee.jpg > > http://users.skynet.be/meteorite.be/Collection/gibeondeformee2.jpg > > > I don't know crater for Gibeon, what's the cause of this shock effet? > > > Bonjour Jacques, Hello List, > > As for deformed Gibeons, most people still believe that these plastic > deformations are due to impact with the Earth. Buchwald argues > against this and says: "This cannot, however, be true since the > distortions often occur in numerous places along the periphery and > almost always, moreover, display necking and other effects of tensile > and shear deformation, rather than compression from impact with the > ground." Instead, he says, these deformations are due to violent atmo- > spheric breakup (disruption). > > > Best Sunday wishes > from sunny Germany, > > Bernd > > Vincent's Gibeon is amazing! I picked up another odd one in Tucson. It looks as if it was made of 3 different pieces: 2 have nice Widmanstatten patterns, but oriented differently, and then there is wedge-shape piece with no pattern at all. It is now on my site: www.impactika.com/meteorites/gibeonslice.html How do you explain that one? Anne Black IMCA #2356 www.IMPACTIKA.com e-mail: IMPACTIKA_at_aol.com --part1_132.ac7dcae.29c65fdd_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit <HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In a message dated 3/17/2002 6:16:05 AM Mountain Standard Time, bernd.pauli_at_lehrer1.rz.uni-karlsruhe.de writes: <BR> <BR> <BR><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">vincent jacques wrote: <BR> <BR>> You can see a nice Gibeon shocked slice from my collection at <BR> <BR>> http://users.skynet.be/meteorite.be/Collection/gibeondeformee.jpg <BR>> http://users.skynet.be/meteorite.be/Collection/gibeondeformee2.jpg <BR> <BR>> I don't know crater for Gibeon, what's the cause of this shock effet? <BR> <BR> <BR>Bonjour Jacques, Hello List, <BR> <BR>As for deformed Gibeons, most people still believe that these plastic <BR>deformations are due to impact with the Earth. Buchwald argues <BR>against this and says: "This cannot, however, be true since the <BR>distortions often occur in numerous places along the periphery and <BR>almost always, moreover, display necking and other effects of tensile <BR>and shear deformation, rather than compression from impact with the <BR>ground." Instead, he says, these deformations are due to violent atmo- <BR>spheric breakup (disruption). <BR> <BR> <BR>Best Sunday wishes <BR>from sunny Germany, <BR> <BR>Bernd <BR> <BR></BLOCKQUOTE> <BR> <BR>Vincent's Gibeon is amazing! <BR>I picked up another odd one in Tucson. It looks as if it was made of 3 different pieces: 2 have nice Widmanstatten patterns, but oriented differently, and then there is wedge-shape piece with no pattern at all. <BR>It is now on my site: <BR> www.impactika.com/meteorites/gibeonslice.html <BR> <BR>How do you explain that one? <BR> <BR>Anne Black <BR>IMCA #2356 <BR>www.IMPACTIKA.com <BR>e-mail: IMPACTIKA_at_aol.com</FONT></HTML> --part1_132.ac7dcae.29c65fdd_boundary-- Received on Sun 17 Mar 2002 04:08:45 PM PST |
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