[meteorite-list] Question Calcalong Creek Crust?

From: ensoramanda at ntlworld.com <ensoramanda_at_meteoritecentral.com>
Date: Fri, 30 Jan 2009 10:52:23 +0000
Message-ID: <20090130105223.T1XY6.1266.root_at_web04-winn.ispmail.private.ntl.com>

Hi All,

However...If you check out Bob Haag's collection book there is a picture of a Milbillillie which has a fusion crust identical to this. page 66.

Perhaps slightly less vesicular.

Graham Ensor, UK.

---- Jeff Kuyken <info at meteorites.com.au> wrote:
> Interesting post Randy. When you compare Adam's image with the one on your
> Calcalong page there are definitely similarities.
>
> http://themeteoritesite.com/Lunar-b.jpg
>
> http://meteorites.wustl.edu/lunar/stones/lm_calcr_1356l_rlk.jpg
>
> I've seen some unusual Millbillillie pieces with crust a different to normal
> (black/brown smooth matte crust) but this does look quite promising. I'd
> certainly be interested to see how this one pans out!
>
> Might have to head out to the strewn field with a magnifying glass! ;-) It
> would be cooler out there right now compared to the baking 45 degree heat
> we've had all week here in Melbourne! That's 113F for the folks in the US!
>
> Cheers,
>
> Jeff
>
>
>
> ----- Original Message -----
> From: "Randy Korotev" <korotev at wustl.edu>
> To: <meteorite-list at meteoritecentral.com>
> Sent: Friday, January 30, 2009 6:03 AM
> Subject: Re: [meteorite-list] Question Calcalong Creek Crust?
>
>
> > Adam:
> >
> > I like it! When you cut it, send me 100-200 mg!
> >
> > Several of those lunar meteorites that are regolith breccias have
> > vesicular fusion crusts.
> >
> > http://meteorites.wustl.edu/lunar/stones/alha81005.htm
> > http://meteorites.wustl.edu/lunar/stones/que93069.htm
> > http://meteorites.wustl.edu/lunar/stones/que94281.htm
> > http://meteorites.wustl.edu/lunar/stones/yamato791197.htm
> > http://meteorites.wustl.edu/lunar/stones/calcalong.htm
> >
> > I'm not aware of examples among the NWA and Dhofar meteorites, but the
> > fusion crusts on many of these have been destroyed, and a vesicular crust
> > is particularly vulnerable to destruction by wind ablation.
> >
> > The lunar regolith is loaded with solar-wing implanted gases (which
> > penetrate only to a depth of few microns right at the moon-space
> > interface) because the fine grained stuff has lots of surface area, it's
> > gardened by micrometeorite impacts on the Moon so new stuff is constantly
> > exposed to the surface, the Moon is close to the sun (compared to most
> > asteroids), and the lunar regolith is thicker because the Moon has more
> > gravity than an asteroid. These gases are released when the meteoroid is
> > heated as it comes through the Earth's atmosphere.
> >
> > Some eucrites and howardites, I believe, are regolith breccias. I don't
> > know enough about these guys to know if any have vesicular fusion crusts,
> > but if they do, they're not likely to be as highly vesicular as the those
> > of lunar meteorites.
> >
> > Randy Korotev
> >
> >
> >
> >
> >
> >
> >
> > At 17:46 28-01-09 Wednesday, you wrote:
> >>Dear list Members,
> >>
> >>I was wondering if anybody had any close-up images of Calcalong Creek? A
> >>strange meteorite? with a brownish crust loaded with vesicles was found in
> >>some small Millbillillie Eucrites and sent to me some time ago. I know
> >>this is how Bob Haag found his lunar rock. I decided to take a chance on
> >>it and gave the finder a nominal fee. I came across it again while going
> >>through one of my safes and decided it was worth investigating some more.
> >>It only weighs 1.89 grams so I do not want to cut it just yet. I saw the
> >>images on Randy Korotev's site and they look similar. I try not to judge
> >>too much on a single image.
> >>
> >>Here is an image of the crust on this object:
> >>http://themeteoritesite.com/Lunar-b.jpg
> >>
> >>Best Regards,
> >>
> >>Adam
> >
> >
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> >
> >
>
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Received on Fri 30 Jan 2009 05:52:23 AM PST