[meteorite-list] Question Calcalong Creek Crust?

[ensoramanda at ntlworld.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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