>From: "capricorn89" <[EMAIL PROTECTED]>
>To: "Bernd Pauli HD" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
>CC: <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
>Subject: Re: [meteorite-list] deformed etch pattern
>Date: Sun, 17 Mar 2002 02:32:13 -0800
>
>Hi Bernd,
>
>You might be interested in examining CD16 on my website.
>http://home.earthlink.net/~capricorn89/rim.htm
>Be sure to click for a full screen image. It is what I call a near rim. It
>was found due west, at the bottom of the outer talus from the rim, about
>12-15 inches deep, so probably tumbled some distance. Found in a region
>which was unusually moist. The crust was like a rustball, but very shallow,
>and when cleaned, the interior WILL NOT RUST. This is an ultra-thin slice.
>It also was almost impossibly hard to cut. On close examination you will
>note slippage plains, and what appears to be several lamella crossing an
>intrusive vein, they are, in fact, not related. This is the most unusual CD
>I have cut, although I have seen this sort of things among research
>specimens, but never any commercially available.
>
>By the way, I had permission to hunt. This was back when I was a student in
>Meteoritics under Dr. Leonard at UCLA.
>
>Best Wishes,
>Ron Hartman
>www.meteorite1.com (meteorites)
>www.meteorite1.org (membrane boxes)
>www.meteorite1.net (cutting, preparation and restoration)
>
>
>
>
>
>
>
>
>----- Original Message -----
>From: Bernd Pauli HD <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
>Sent: Sunday, March 17, 2002 2:06 AM
>Subject: [meteorite-list] deformed etch pattern
>
>
> > Greg Redfern wrote:
> >
> > > an unusual etch pattern present in a Canyon Diablo Rim. Contrast
> > > the nearly featureless RIM etch pattern with that of an etched
> > > "plains" Canyon Diablo specimen. The Rim specimen was subjected
> > > to great heat from the impact event which essentially erased the
> > > Widmanstätten lines.
> >
> >
> > Hi Greg and List,
> >
> > An interesting specimen! While the Widmanstätten pattern
> > is still recognizable, the bandwidth seems to have been
> > "squeezed", the lines are bent, the pattern looks much
> > more "diffuse" than the unshocked specimen recovered
> > from the surrounding plain.
> >
> > By the way, Buchwald mentions 7 different alteration stages:
> >
> > BUCHWALD V.F. (1975) Handbook of Iron Meteorites, Volume 2, pp. 390-397:
> >
> > 1. Original unshocked material
> > 2. Shock-hardened masses
> > 3. Shock-annealed masses
> > 4. Shock-annealed to recrystallization
> > 5. Shock-annealed to alpha2-transformation
> > 6. Shock-annealed to alpha2-transformation and
> > recrystallization of cohenite and schreibersite
> > 7. Partly remelted specimens
> >
> > Another interesting feature of your "rim specimen" is the small thin
> > schreibersite skeleton crystals some of which which are oriented at
> > a 90° angle in the middle of the picture.
> >
> >
> > Best Sunday
> > morning wishes,
> >
> > Bernd
> >
> > ______________________________________________
> > Meteorite-list mailing list
> > [EMAIL PROTECTED]
> > http://www.pairlist.net/mailman/listinfo/meteorite-list
>
>
>______________________________________________
>Meteorite-list mailing list
>[EMAIL PROTECTED]
>http://www.pairlist.net/mailman/listinfo/meteorite-list
MSN Photos est le moyen le plus simple de partager, modifier et imprimer vos photos préférées.
______________________________________________
Meteorite-list mailing list
[EMAIL PROTECTED]
http://www.pairlist.net/mailman/listinfo/meteorite-list
