Re: [meteorite-list] Re: Wanted Meteorites with Craters
Hello All, If anyone can host some images for me, I can send them some pics of cratered Sikhotes to be put up. I've been collecting them at shows over the last few years and have examples on both the trailing and leading edges of specimens, as well as a few on non-oriented irons. Mark Bostick mentioned something about them quite a while ago...I think he sawmy best example a few years ago shortly after its purchasein Tucson. Regards, Jason On 6/18/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Here are a few shots of my 55g Sikhote Alin with a nice rimmed crater. Best, Doug Finch http://smg.photobucket.com/albums/v240/astrocop/May%202004%20Texas%20astro%20star%20party/Sikhote-Alin/ __Meteorite-list mailing list Meteorite-list@meteoritecentral.comhttp://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Wanted Meteorites with Craters
Hi Mike, Try this page I made some time ago: http://www.meteorites.com.au/features/funkysa.html This topic has been discussed on the list before and there are a number of theories on how they may have occured. Personally, I believe it happened during mid-late stage atmospheric entry with the larger detonating pieces. It's odd that about 90% of the SA impact pits I've seen are on the trailing side of oriented individuals. I don't see how it would be possible to have micro-meteoroid impact pits if 90%+ of the original mass is lost through ablation. I contacted someone who was into ballistic science once to see if they were able to determine what sort of masses and velocities would be required to produce these features but they never got around to it. Maybe someone on this list is able to do it or knows someone who can? Cheers, Jeff - Original Message - From: Mike Bandli To: Meteorite-list@meteoritecentral.com Sent: Sunday, June 18, 2006 1:35 PM Subject: [meteorite-list] Re: Wanted Meteorites with Craters I have received several replies from people who misunderstood my original post and wanted to clarify what I was looking for. By stating 'craters' several people thought I simply meant regmaglypts or thumbprints - this is not what I meant. I am looking for meteorites with actual micrometeoroid impact craters/pits. These are meteorites that while re-entering or in space had collisions with micrometeoroids and exhibit an actual impact crater with a splash rim. There is a great example on Geoff Notkins page here: http://www.aerolite.org/gallery/sikhote-alin-266-4.htm and http://www.aerolite.org/gallery/sikhote-alin-impact-pits.htm If you don't have any for sale I would still love to get some photos of examples of micrometeoroid craters on meteorites. Thanks! Mike Bandli __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Wanted Meteorites with Craters
On Sun, 18 Jun 2006 16:05:42 +1000, you wrote: Hi Mike, Try this page I made some time ago: http://www.meteorites.com.au/features/funkysa.html This topic has been discussed on the list before and there are a number of theories on how they may have occured. Personally, I believe it happened during mid-late stage atmospheric entry with the larger detonating pieces. It's odd that about 90% of the SA impact pits I've seen are on the trailing side of oriented individuals. I don't see how it would be possible to have micro-meteoroid impact pits if 90%+ of the original mass is lost through ablation. What's everyone's opinion on this one? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=6636585578 To me, the sides of the crater look too smooth and not like other examples I've seen (including the ones mentioned here). Coincidental shape, or a crater that has had the edges somehow smoothed (either atmosphericly or during cleaning)? __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Wanted Meteorites with Craters
Hi Darren, Not an impact pit. Probably an example of 'double' or 'dual' orientation which I've seen quite a few of in SA and Taza. http://www.meteorites.com.au/features/taza2.html I've also got a Sikhote with a similar feature. I believe it has something to do with the air pressure/pocket at the leading point of a stable flight individual. Maybe any existing hollow/pit that was there before (or in early) atmospheric entry is accentuated?! Cheers, Jeff - Original Message - From: Darren Garrison To: Meteorite-list@meteoritecentral.com Sent: Sunday, June 18, 2006 4:14 PM Subject: Re: [meteorite-list] Re: Wanted Meteorites with Craters On Sun, 18 Jun 2006 16:05:42 +1000, you wrote: Hi Mike, Try this page I made some time ago: http://www.meteorites.com.au/features/funkysa.html This topic has been discussed on the list before and there are a number of theories on how they may have occured. Personally, I believe it happened during mid-late stage atmospheric entry with the larger detonating pieces. It's odd that about 90% of the SA impact pits I've seen are on the trailing side of oriented individuals. I don't see how it would be possible to have micro-meteoroid impact pits if 90%+ of the original mass is lost through ablation. What's everyone's opinion on this one? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=6636585578 To me, the sides of the crater look too smooth and not like other examples I've seen (including the ones mentioned here). Coincidental shape, or a crater that has had the edges somehow smoothed (either atmosphericly or during cleaning)? __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Wanted Meteorites with Craters
Wow Jeff! That's remarkable. Thanks for sharing. Jerry - Original Message - From: Jeff Kuyken [EMAIL PROTECTED] To: Mike Bandli [EMAIL PROTECTED]; Meteorite-list@meteoritecentral.com Sent: Sunday, June 18, 2006 2:05 AM Subject: Re: [meteorite-list] Re: Wanted Meteorites with Craters Hi Mike, Try this page I made some time ago: http://www.meteorites.com.au/features/funkysa.html This topic has been discussed on the list before and there are a number of theories on how they may have occured. Personally, I believe it happened during mid-late stage atmospheric entry with the larger detonating pieces. It's odd that about 90% of the SA impact pits I've seen are on the trailing side of oriented individuals. I don't see how it would be possible to have micro-meteoroid impact pits if 90%+ of the original mass is lost through ablation. I contacted someone who was into ballistic science once to see if they were able to determine what sort of masses and velocities would be required to produce these features but they never got around to it. Maybe someone on this list is able to do it or knows someone who can? Cheers, Jeff - Original Message - From: Mike Bandli To: Meteorite-list@meteoritecentral.com Sent: Sunday, June 18, 2006 1:35 PM Subject: [meteorite-list] Re: Wanted Meteorites with Craters I have received several replies from people who misunderstood my original post and wanted to clarify what I was looking for. By stating 'craters' several people thought I simply meant regmaglypts or thumbprints - this is not what I meant. I am looking for meteorites with actual micrometeoroid impact craters/pits. These are meteorites that while re-entering or in space had collisions with micrometeoroids and exhibit an actual impact crater with a splash rim. There is a great example on Geoff Notkins page here: http://www.aerolite.org/gallery/sikhote-alin-266-4.htm and http://www.aerolite.org/gallery/sikhote-alin-impact-pits.htm If you don't have any for sale I would still love to get some photos of examples of micrometeoroid craters on meteorites. Thanks! Mike Bandli __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Wanted Meteorites with Craters
Here are a few shots of my 55g Sikhote Alin with a nice rimmed crater. Best, Doug Finch http://smg.photobucket.com/albums/v240/astrocop/May%202004%20Texas%20astro%20star%20party/Sikhote-Alin/ __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
