[meteorite-list] Microcrater Swarms on Canyon Diablo

From: Mr EMan <mstreman53_at_meteoritecentral.com>
Date: Thu, 19 Feb 2009 15:38:43 -0800 (PST)
Message-ID: <751475.40268.qm_at_web55203.mail.re4.yahoo.com>

Without researching to much on my own part, I would mention weathered out graphite and/or troilite nodules/veins. The holes are too deep to be crater pits, IMO

Elton


--- On Thu, 2/19/09, Dark Matter <freequarks at gmail.com> wrote:

> From: Dark Matter <freequarks at gmail.com>
> Subject: [meteorite-list] Microcrater Swarms on Canyon Diablo
> To: "Meteorite List" <meteorite-list at meteoritecentral.com>
> Date: Thursday, February 19, 2009, 4:42 PM
> Hi All,
>
> Once again, I found myself wandering the Smithsonian
> meteorite display
> in Washington DC this past weekend. This time, however, I
> spent less
> time studying the sexy stones and irons, and instead
> concentrated on
> the more common ones that I usually overlook.
>
> One in particular caught my attention.
>
> On display is a 435kg individual of Canyon Diablo. At
> first, I started
> on a quest to answer the question about if CD contains
> thumbprints or
> not. As I was carefully studying the surface, I noticed
> what I can
> only describe as swarms of micro craters.
>
> I tried to come up with alternate hypotheses such as
> mechanical
> disassembly like pounding on it with a hammer and chisel,
> but no go.
> They have the splashforms of craters just like those
> commonly found on
> Sikhote-Alin individuals. Here's a link to a .pdf
> article about the
> S-A impact craters:
>
> http://www.lpi.usra.edu/meetings/LPSC98/pdf/1839.pdf
>
>
> Linked are some pics of what I'm talking about.
>
> http://www.geocities.com/planetwhy/CD1.JPG
>
> http://www.geocities.com/planetwhy/CD2.JPG
>
> http://www.geocities.com/planetwhy/CD3.JPG
>
> Any thoughts?
>
> -Martin
> ______________________________________________
> http://www.meteoritecentral.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Thu 19 Feb 2009 06:38:43 PM PST