[meteorite-list] Cool Fresh Chondrites and "Slick-n-Slide"

From: Norm Lehrman <nlehrman_at_meteoritecentral.com>
Date: Fri Mar 10 00:02:07 2006
Message-ID: <20060310050205.95007.qmail_at_web81012.mail.mud.yahoo.com>

Pete & list,

> There are meteorites with slickenside?!
> It would have to be Martian, then, right?
>

Yes, slickensided meteorites have been discussed
several times on the list. But no, they don't have to
be planetary. I would only be speculating on the
actual limiting conditions, but the parent body just
needs to be sufficiently large and cohesive to break
and move in frictional contact with the opposing
surface a few inches or less. I'm guessing that even
in small bodies without enough gravity to hold breaks
in frictional contact, the pressures of a hard impact
could do the job.

I've never really thought about it before, but I can't
see any reason why the striated surfaces on Sikhote
shrapnel wouldn't be appropriately termed
"slickensides". The Glossary of Geology gives this
definition: "A polished and smoothly striated surface
that results from friction along a fault plane" (a
fault is a surface along which movement has occured).
Hence, you take even a baseball-sized lump of iron and
impact it so hard that it breaks and slips a little
under the compression of impact, and you could expect
surface features that would meet the definition of
slickensides.

Cheers,
Norm
http://tektitesource.com

--- Pete Pete <rsvp321_at_hotmail.com> wrote:

> Hi, Norm & all,
>
> There are meteorites with slickenside?!
> It would have to be Martian, then, right?
>
> Cheers,
> Pete
>
>
> From: Norm Lehrman <nlehrman_at_nvbell.net>
> To: Greg Hupe
>
<gmhupe_at_tampabay.rr.com>,meteorite-list@meteoritecentral.com
> Subject: Re: [meteorite-list] Cool Fresh Chondrites
> and "Slick-n-Slide"
> Date: Thu, 9 Mar 2006 13:18:31 -0800 (PST)
>
> Greg & all,
>
> Nice specimens.
>
> Just a minor side point: the term is "slickensides"
> for the striated, movement-polished surface itself,
> or
> "slickensided" for a rock showing slickensides.
> Your
> version is a common, but erroneous, transliteration.
>
> Cheers,
> Norm
> http://tektitesource.com
>
> --- Greg Hupe <gmhupe_at_tampabay.rr.com> wrote:
>
> > Dear List Members,
> >
> > I have been going through the material I brought
> > back from my Morocco trip
> > last week. Here are some photos of some very nice
> > fresh chondrites, an
> > unusual thing these days coming out of Morocco.
> > There are two pictures of
> > some very good examples of Slick-n-Slide also. I
> > have not seen chondrites
> > this nice for a long time out of the Sahara.
> >
> > 4170 gram Large and Fresh Thumb Printed chondrite
> -
> > VERY COOL !!
> > http://www.lunarrock.com/3-9/dsc00001.jpg
> >
> > 140 gram Individual - Neat Shape
> > http://www.lunarrock.com/3-9/dsc00013.jpg
> >
> > 122.7 gram Slick-n-Slide (Best Example I have
> Seen
> > for a Long Time)
> > http://www.lunarrock.com/3-9/dsc00023.jpg
> >
> > 25.6 gram Slick-n-Slide (Unfortunately broke
> during
> > airplane ride home)
> > http://www.lunarrock.com/3-9/dsc00025.jpg
> >
> > Hope you enjoy the pictures.
> >
> > Best regards,
> >
> > Greg Hupe
> > The Hupe Collection
> > NaturesVault (eBay)
> > gmhupe_at_tampabay.rr.com
> > IMCA 3163
> >
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> >
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> >
>
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Received on Fri 10 Mar 2006 12:02:05 AM PST