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 <[email protected]> wrote: > From: Bob Loeffler <[email protected]> > Subject: Re: [meteorite-list] Libyan (looks like a) crater > To: [email protected] > 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: [email protected] > [mailto:[email protected]] > On Behalf Of Mark > Bowling > Sent: Wednesday, December 09, 2009 11:39 AM > To: [email protected]; > 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 <[email protected]> > wrote: > > > From: Randy Korotev <[email protected]> > > Subject: [meteorite-list] Libyan (looks like a) > crater > > To: [email protected] > > 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 > > [email protected] > > > > > > ______________________________________________ > > http://www.meteoritecentral.com > > Meteorite-list mailing list > > [email protected] > > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > ______________________________________________ > http://www.meteoritecentral.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.709 / Virus Database: 270.14.98/2552 - Release > Date: 12/09/09 > 00:32:00 > > ______________________________________________ > http://www.meteoritecentral.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
