[meteorite-list] crust on Meteorites on Mars ?
From: MexicoDoug_at_aol.com <MexicoDoug_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:00 2004 Message-ID: <142.2020ac8a.2d2f0c2f_at_aol.com> --part1_142.2020ac8a.2d2f0c2f_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit En un mensaje con fecha 01/08/2004 1:08:33 PM Mexico Standard Time, Z.Gabelica_at_uha.fr escribe: > I assume (unless I miss something important) that a meteorite falling on > Mars would not carry any kind of fusion crust because of the particular tiny > atmosphere (friction and melting minimized or nil, especially if oxygen is > hardly present) Hello, isn't, the fusion crust is caused by friction = heating ablation alone and is independent of oxygen? Also, there is plenty of atmosphere to cause ablation on Mars, just much more likely that the impact occurs while ablation is still in process, or not cooled as much as on Earth, for all except small pieces, and that larger pieces survive passage of the atmosphere to have fate determined at impact. And tektites should be very common on Mars...it would probably be an excellent place for a meteorite hunter to make a tektite collection. Perhaps red like Sahara Glasses are common. Saludos Doug Dawn Mexico --part1_142.2020ac8a.2d2f0c2f_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable <HTML><FONT FACE=3Darial,helvetica><HTML><FONT SIZE=3D2 PTSIZE=3D10 FAMILY= =3D"SANSSERIF" FACE=3D"Arial" LANG=3D"0">En un mensaje con fecha 01/08/2004=20= 1:08:33 PM Mexico Standard Time, Z.Gabelica_at_uha.fr escribe:<BR> <BR> <BLOCKQUOTE TYPE=3DCITE style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">I assume (unless I miss somethi= ng important) that a meteorite falling on<BR> Mars would not carry any kind of fusion crust because of the particular tiny= <BR> atmosphere (friction and melting minimized or nil, especially if oxygen is<B= R> hardly present)</BLOCKQUOTE><BR> <BR> Hello, isn't, the fusion crust is caused by friction =3D heating ablation al= one and is independent of oxygen? Also, there is plenty of atmosphere=20= to cause ablation on Mars, just much more likely that the impact occurs whil= e ablation is still in process, or not cooled as much as on Earth, for all e= xcept small pieces, and that larger pieces survive passage of the atmosphere= to have fate determined at impact.<BR> <BR> And tektites should be very common on Mars...it would probably be an excelle= nt place for a meteorite hunter to make a tektite collection. Perhaps=20= red like Sahara Glasses are common.<BR> <BR> Saludos<BR> Doug Dawn<BR> Mexico</FONT></HTML> --part1_142.2020ac8a.2d2f0c2f_boundary-- Received on Thu 08 Jan 2004 02:40:31 PM PST |
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