[meteorite-list] Libyan (looks like a) crater

[Mark Bowling]

I think the same about the sedimentary origin Bob.

I hadn't thought about lightning and fulgurite idea.  The munitions theory seems very plausible too.  Still wondering what region it's in...

Mark

--- On Wed, 12/9/09, Bob Loeffler <bobl at peaktopeak.com> wrote:

> From: Bob Loeffler <bobl at peaktopeak.com>
> Subject: Re: [meteorite-list] Libyan (looks like a) crater
> To: meteorite-list at meteoritecentral.com
> Date: Wednesday, December 9, 2009, 6:43 PM
> That is interesting.  I wonder
> how deep it is if someone walked to the
> middle of it and scooped the sand out?  Maybe it's a
> highly eroded impact
> crater that has been filled in with sand over the years.
> 
> The rock looks like a sedimentary conglomerate of sand and
> some darker
> material.  I wouldn't call it "fused", but I'm not an
> expert geologist.
> What if that was a pool of water a long time ago and it got
> hit by
> lightning?  The sand around the edge of the water
> wouldn't fuse as much as a
> fulgurite would (since the water would distribute the
> electrical current
> throughout the pool), but maybe there would be enough
> electrical current to
> partially fuse it together?  Again, I'm not an
> expert.  Just guessing.  :-)
> 
> Bob Loeffler
> 
> 
> -----Original Message-----
> From: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com]
> On Behalf Of Mark
> Bowling
> Sent: Wednesday, December 09, 2009 11:39 AM
> To: meteorite-list at meteoritecentral.com;
> Randy Korotev
> Subject: Re: [meteorite-list] Libyan (looks like a) crater
> 
> Randy,
> 
> It does look like a crater!  I wouldn't assume it's
> related to LDG per se,
> as that glass is found in Egypt.  Did he give a rough
> indication of where in
> Libya?  Wouldn’t an impact site for LDG be a bit
> larger in scale?  The
> sample looks pretty interesting, but it could be
> sedimentary in nature
> because, just looking at the photo, the tiny grains don’t
> look melted.  I
> would be excited if I found such a feature.  Hard to
> say just from photos.
> 
> How about the Sahara explorers – have you seen many
> similar features in the
> desert?
> 
> 
> Thanks for sharing!
> 
> Mark B.
> Vail, AZ
> 
> --- On Wed, 12/9/09, Randy Korotev <korotev at wustl.edu>
> wrote:
> 
> > From: Randy Korotev <korotev at wustl.edu>
> > Subject: [meteorite-list] Libyan (looks like a)
> crater
> > To: meteorite-list at meteoritecentral.com
> > Date: Wednesday, December 9, 2009, 8:21 AM
> > Dear List:
> > 
> > I received this intriguing e-mail today from someone
> I
> > don't know.
> > 
> > =========================
> > 
> > Dear Randy, I am a geophysicist and had a recent trip
> on
> > Libyan desert for campaign of geophysical
> investigations,
> > mostly GPR and Geoelectric tomography. Going back to
> the
> > camp I found at sunset –due to low angle light-
> something
> > strange on the flat desert surface.
> > 
> > I found a perfect circular crater with melt sand
> scattered
> > around . sand grains are melt and embedding larger
> quartz
> > grains. In my opinion that’s a impact crater and
> sand is
> > melt because of the heat wave. Larger grains had no
> time to
> > melt .
> > 
> > That melt rock has a black matrix-nothing like that in
> the
> > area, also there are no similar structures in that
> flat,
> > flat flat  desrt surface, sand is only silica and
> > quartz grain and no dark matrix can be seen for
> kilometers.
> > 
> > I made a few geophysics on the spot and found big
> electric
> > anomalies and very anomalous readings of Geoelectric
> > values.
> > 
> > I took a few samples of melt rock –very heavy
> really.
> > 
> > I am posting a few photos of the crater.
> > 
> > I have another stone found at 2500 m on the bed of a
> melt
> > glacier, same story, that’s not a stone of the area,
> it is
> > like a fuse, heavy and black inside with a very
> aerodynamic
> > shape, I will mail you a photo ( after reading once
> more
> > your recommendations) if interested . for sure not a
> human
> > artifact or an original stone of the area.
> > 
> > Sorry to disturb,
> > ...
> > =========================
> > I put the photos here:
> > 
> > http://meteorites.wustl.edu/meteorwrongs/libyan_crater.htm
> > 
> > The round thing in the desert looks something like a
> > crater.  Maybe it's a bomb crater.  Maybe it's a
> > meteorite impact crater.  The rock doesn't look like
> > samples of Libyan desert glass that I've seen.  I
> don't
> > know the LDG story well.  Has there ever been a
> crater
> > associated with the glass?
> > 
> > 
> > Randy Korotev
> > Saint Louis, MO
> > korotev at wustl.edu
> > 
> > 
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