Rocks from outer space - duck and cover http://www.mindat.org/msgboard-98.html Sun, 19 May 2013 13:29:50 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,98,285402,285402#msg-285402 http://www.mindat.org/forum.php?read,98,285402,285402#msg-285402 livesicilia.it]]]> Ferdinando Giovine Meteorites Sat, 16 Mar 2013 16:21:52 +0000 http://www.mindat.org/forum.php?read,98,274555,274555#msg-274555 http://www.mindat.org/forum.php?read,98,274555,274555#msg-274555 Jerry Montgomery Meteorites Sat, 16 Feb 2013 19:10:20 +0000 http://www.mindat.org/forum.php?read,98,269680,269680#msg-269680 http://www.mindat.org/forum.php?read,98,269680,269680#msg-269680 Yanick Beaudet Meteorites Wed, 29 Aug 2012 04:53:53 +0000 http://www.mindat.org/forum.php?read,98,263865,263865#msg-263865 http://www.mindat.org/forum.php?read,98,263865,263865#msg-263865
Picture 1- I purchased this one last year from meteorites for sale.com for about 90$ which is pricey for it being 67 grams, but nice that it came with a certificate of authenticity.

Picture 2 - Purchased this one on ebay, for 200$, got a good deal, I did some negotiating to get it that low :-D it weights a whopping 492 grams.

I recently opened a collectors website, and was debating on putting these for sale in my webstore.. OR I will hold onto them. What do you guys think is a wiser choice? I hear they closed down canyon diablo recently for searching.]]> Daniel jacobs Meteorites Sat, 16 Jun 2012 21:28:02 +0000 http://www.mindat.org/forum.php?read,98,252924,252924#msg-252924 http://www.mindat.org/forum.php?read,98,252924,252924#msg-252924
I can provide this data:
Location: Taouz, Morocco
Purchase Date: Summer 2010
Density: ± 6-7
Measures: 18 x 16 x 8 cm.
Weight: 4.5 Kg
Magnetic: no
No bubbles but a few small holes (see photos).
Do not let trace on paper.

Here are the pictures:
One side:
[attachment 36825 M1.JPG]

Other side:
[attachment 36826 M2.JPG]

Detail:
[attachment 36827 M3.JPG]]]> Jose Zendrera Meteorites Tue, 21 Feb 2012 15:24:57 +0000 http://www.mindat.org/forum.php?read,98,252891,252891#msg-252891 http://www.mindat.org/forum.php?read,98,252891,252891#msg-252891
From lunar landscape to Dublin dump

Dr Ian Elliott worked at the Dunsink Observatory in Dublin when it was destroyed by fire on 3 October 1977.
I heard about the fire on the morning news. I can tell you, that was a bit of a shock.
My main concern was with the disruption to the work of the observatory. It was only afterwards that we realised that the bit of Apollo 11 Moon rock could not be found.
It was gathered up with all of the other debris and dumped in the municipal dump which was conveniently just across the road.
It is probably the only municipal dump in the world that has got a bit of Moon rock.
If we'd had any perception of the rock's value, perhaps all of the debris would have been sifted by archaeologists and it might have been found.
I am amazed that anyone puts a value of $5m on it, though there are a lot of mad people with money around so they might just pay that.
It is a very big dump, I am afraid. It is worse than a needle in a haystack - you would never find it.

Considering that specimen mining projects usually involve an enormous amount of effort, and only rarely result in the recovery of $5 m worth of specimens, a mining project in the Finglas dump might be worth the trouble. :)-D]]> Alfredo Petrov Meteorites Mon, 20 Feb 2012 20:47:22 +0000 http://www.mindat.org/forum.php?read,98,252466,252466#msg-252466 http://www.mindat.org/forum.php?read,98,252466,252466#msg-252466
It's all rubbish - be warned. This person has been around since at least 2006...

[meteorites.wustl.edu]
[meteorite-identification.com]
[www.thescienceforum.com]
[www.mail-archive.com]]]> Uwe Kolitsch Meteorites Thu, 16 Feb 2012 15:57:58 +0000 http://www.mindat.org/forum.php?read,98,247639,247639#msg-247639 http://www.mindat.org/forum.php?read,98,247639,247639#msg-247639 I am going to the Mindat conference in Morocco. We will probably be offered meteorites by some of the local mineral dealers. I would like to buy some meteorites, but I do not know too much about them.

Is there a lot of fake meteorites offered for sale in Morocco?

Is there any ways a mineral collector can identify fakes from the real ones with the help of 10x hand lens?

OT. Ljostad
Elverum
Norway]]> Ot. Ljostad Meteorites Tue, 26 Feb 2013 15:59:09 +0000 http://www.mindat.org/forum.php?read,98,244721,244721#msg-244721 http://www.mindat.org/forum.php?read,98,244721,244721#msg-244721 Jerry Montgomery Meteorites Fri, 09 Dec 2011 04:12:13 +0000 http://www.mindat.org/forum.php?read,98,244000,244000#msg-244000 http://www.mindat.org/forum.php?read,98,244000,244000#msg-244000 Thanks for any input.]]> Jerry Montgomery Meteorites Mon, 05 Dec 2011 13:52:39 +0000 http://www.mindat.org/forum.php?read,98,242514,242514#msg-242514 http://www.mindat.org/forum.php?read,98,242514,242514#msg-242514 james miller Meteorites Tue, 22 Nov 2011 01:09:38 +0000 http://www.mindat.org/forum.php?read,98,238830,238830#msg-238830 http://www.mindat.org/forum.php?read,98,238830,238830#msg-238830 It's not in the Meteoritical Bulletin Database.


Chikashige, M.; Hiki, T. (1912): A Recent Fall of Meteoric Iron in Japan. Zeitschrift für Anorganische Chemie 77, 197-199.

"Reports on a meteor that fell April, 1904 in Okauo near Sasayama. (1) The Okauo meteor is one of the few meteors, the fall of which was directly observed. (...)"


EDIT: Found it myself - it's the Okano meteorite (so there is either a misprint in the original paper or in the literature database from which I obtained the ref.]]> Uwe Kolitsch Meteorites Wed, 19 Oct 2011 17:34:49 +0000 http://www.mindat.org/forum.php?read,98,219631,219631#msg-219631 http://www.mindat.org/forum.php?read,98,219631,219631#msg-219631 [news.yahoo.com]]]> Ronald John Gyllenhammer Meteorites Wed, 06 Apr 2011 15:56:42 +0000 http://www.mindat.org/forum.php?read,98,217150,217150#msg-217150 http://www.mindat.org/forum.php?read,98,217150,217150#msg-217150 Does that question make sense?
I've been reading that it has been possible to find a strewn field when a meteor was photgraphed/videoed... Does there need to be two or more observation points?
I saw a spectacular (I think) fall early this morning.]]> Kevin Farrell Meteorites Wed, 16 Mar 2011 19:06:14 +0000 http://www.mindat.org/forum.php?read,98,213879,213879#msg-213879 http://www.mindat.org/forum.php?read,98,213879,213879#msg-213879
www.mcomemeteorite.eu]]> Matteo Chinellato Meteorites Wed, 16 Feb 2011 19:56:52 +0000 http://www.mindat.org/forum.php?read,98,213464,213464#msg-213464 http://www.mindat.org/forum.php?read,98,213464,213464#msg-213464 Even though some people believe the Kebira crater could be the source of the LDG, it seems there is some debate if its even a crater, but even if eventualy its proved to be not a crater it doesnt matter because it has been speculated there was no impact at all and the LDG was formed by a airburst of a meteroid or comet, like the Tunguska event which would explain the lack of a crater, I'm happy enough to go with that theory!
However something had been bugging me, it seems to me that a lot of places are suggesting this event happened over a sandy area like the desert is today, but this happened about 28 million years ago, and i started wondering if the desert was there at all all that time ago, it could have been lush forests back then so where would all the silica have come from?
Then i found this interesting article, that explains a possible non impact origin.
[www.b14643.de]
This seems to be the most comprhensive research i have found that points to a non impact explanation, It even explains how the traces of Iridium got there.
I think a lot more research needs to be done on LDG, until then i will continue to believe my LDG is the result of a meteoric event.
Before i finish this post i have a question about some features i found on my specimen, one i think is a lot easier to explain than the other, i found several round cavities in which are embedded almost spherical opaque greyish objects, i am 99% sure these are quartz grains that have been rounded by the action of sand erosion that have found there way into the cavities, they seem to be held in place by orangey sand. I inititialy thought it might be cristobalite as i read this can be found as incluisons in ldg, and i saw some photos which showed they are spherical, and i wondered if the objects where close to the surface and got weathered out, but then i found out those cristobalite inclusions are tiny so i think i can rule that out, you can see one of the spheres in the attached photo.
the close up photo shows a strange feature that i think is harder to explain, i call it a slug! it was hard to get a decent photo as it is quite small the best i can describe it as if some molten wax was dripped on it and has enclosed some pinky orangey material similar colour to the sand in those cavities only this is entrapped within the "slug"

Jason]]> Jason Evans Meteorites Sun, 26 Aug 2012 06:01:48 +0000 http://www.mindat.org/forum.php?read,98,213284,213284#msg-213284 http://www.mindat.org/forum.php?read,98,213284,213284#msg-213284
Hi, I am primarily a mineral collector but have a small collection of meteorites and a few tektites, and I am awaiting my first sample of Libyan desert glass and i eventualy plan to add some other impactites like melt breccias, shattercones etc, I have a small bit of K-T boundary layer from colorado but dont know what to class that as, I'll call it a impactite!

Anyway I have some questions regarding Tektites, maybe i wont get an answer to all my questions becuase i think there is still much to learn about tektites, for instance therse seems to be no definate conclusion as to there origin, i'm still seeing some places saying they originate from the moon, and a lot of sites seem very reluctant to say they are definatley the result of a metor impact, most say thats the most probable cause but why is nobody prepred to step forward and say they ARE from a impact?

Can anyone suggest some serious reading about tekltites with scientificaly proven facts, that doesnt mention the word POWERFUL! I am getting really peed off with the new age crowd claiming that tektites (in particular Moldavites) have got intense powers etc, i dont feel any of these powers myself and i have 4 Moldavites, and one new age person said i had a strong aura so surely i should pick up on these powers! well i do not want this to be a dig at those folks so I shall say no more on that!

With a renewed interest in tektites afer my latest aquistion, which i would like to talk about in more detail later, i read about the Georgiaite group of tektites, something got my attention, i read on several sites that the Georgiaites are green, and i thought hang on, i thought only the Moldavites are green, so i looked for some images of Georgiaites and what did i find, yellow tektites, i found no pictures at all that showed a green tektite, they are certianly more yellowish in colopur than the black tektites but ive notice both my black tektites (unkown localitities) are yellowish with a strong light shone through them whereas some of the georgiaites did appear more yellow without needing a strong light source behind them but i didnt see any hint of green at all, does anyone have some photos of these "green" georgiates?

About tektite strewnfeilds, I shall use moldavite as an example, the moldavites are all found to the east of the crater which is beleived to be the source of the moldavites, (Nordlinger ries) I read somewhere a long time ago that whatever angle a meteorite strikes the earth it will always create a circular crater, my question is, why would the ejecta/moldavites only be thrown out to the east, surelly tektite strewn fields would form a circular ring around the source crater?

Tektite markings, until only a week or so ago i always beleived the markings were created by the molten material flowing across the surface as the tektite flew through the air, like the regmaglypts on meteorites but now i foudn out the markings are caused by acid eteching, how has this been confirmed? they really do look like flow markings to me, on my new moldavite which is a teardrop shape so it shows the direction of flight, the markings do seem to originate from the "nose" of the specimen and flow back across the surface to the tail, its quite cool really becuase they seem to whirl out like the arms of a spiral galaxy from a point on the blunt "nose" end of the moldavite.

Almost done now! just wondering if it is known what causes the green colour of Moldavites and why it is unique to moldavites

And finaly, I would like to show of my latest specimen, a 12.4 tear drop Moldavite (from a I.M.C.A member) so I am not asking if its the real thing or not! I just want to share it, with people who understand what it is and dont just say, oh it looks like a prune! becuase i think its the best Moldavite in the world! (i know its not really, I have seen better, but its the best piece i have seen that i am able to physicaly hold, would like to know what other meteorite/tektite fans think of it!

One photo is backlit using sunlight and one is not backlit, the backlit photo is the original pic, not the one i added to the mindat gallery becuase i painted the background white for that!

Hope someone can help answer some of my questions!

Jason]]> Jason Evans Meteorites Tue, 22 Nov 2011 22:07:25 +0000 http://www.mindat.org/forum.php?read,98,209825,209825#msg-209825 http://www.mindat.org/forum.php?read,98,209825,209825#msg-209825 official and complete classification table (or similar) for meteorites?

Per favore qualcuno può segnalarmi una classificazione ufficiale e completa per le meteoriti?

Thanks,

Luca]]> Luca Baralis Meteorites Mon, 24 Jan 2011 13:55:25 +0000 http://www.mindat.org/forum.php?read,98,179691,179691#msg-179691 http://www.mindat.org/forum.php?read,98,179691,179691#msg-179691 1. roughly 128mm wide x 137mm tall x 76mm thick;
2. has distinct, scalloped regmaglypts on the main face and other faces to some extent;
3. has a smooth, almost shiny metallic black patina/ crust all over it with some very slight rust (oxidation) showing;
4. is magnetic and affects a compass passed around it;
5. is quite heavy/dense for its size (not porous at all).

I'm pretty sure it is not from this property as the previous owner was quite the rockhound.

Do I get lab tests run and what kind? Thin slices? I have no idea what to do with this thing but, by all the stuff I've seen for sale, it is VERY unique indeed.]]> Tex lang Meteorites Thu, 10 Feb 2011 19:51:10 +0000 http://www.mindat.org/forum.php?read,98,173385,173385#msg-173385 http://www.mindat.org/forum.php?read,98,173385,173385#msg-173385
Runs with meteors Wrote:
-------------------------------------------------------
> It is true, I am the intern that he speaks of. I
> was at the Smithsonian National Museum of Natural
> History when the "Lorton Meteorite" creamed a
> doctors office in Lorton, VA. I was a part of a
> team that went down to Lorton, VA to search for
> other meteorites and as well we stopped by the
> doctors office. If any of you have seen the local
> news for the DC/VA/MD area I'm in the background
> of much of the video clips, taking to other
> reporters, co-workers at the Smithsonian and USGS
> staff. On local channel 9 they even walked with us
> as we searched and I was shown later that night on
> TV digging in a hole where I was hoping to pull
> out a meteorite...to no avail. BUT I did have a
> great time, and an unforgettable experience! I am
> going back to continue my internship at the end of
> March... hopefully by then the ownership debate
> will have settled down. I of course want the
> meteorite to end up on display at the museum!
> Here are a couple photos as well as links to
> videos and articles regarding the meteorite that
> fell in Lorton, VA on Martin Luther King's Day
> 2010.
>
>
>
>
>
> local 9:
> [www.wusa9.com];
> storyid=96239#/WUSA%2DNews/Meteorite+Hunters+And+S
> cience+Channel+Crew+In+Lorton/46371336001/45927990
> 001/62736223001
>
> ABC:
> [www.wjla.co...m]
> deo.html?ref=newsstory
>
> FOX:
> [www.myfoxdc.com]
> ffice-hit-by-meteorite-012110
>
> Washington Post
> [www.washingtonpost.com]
> le/2010/01/28/AR2010012804235.html]]> the catch a rising star Meteorites Thu, 25 Feb 2010 05:01:02 +0000 http://www.mindat.org/forum.php?read,98,157695,157695#msg-157695 http://www.mindat.org/forum.php?read,98,157695,157695#msg-157695
[readrussia.com]

[en.rian.ru]]]> Matteo Chinellato Meteorites Tue, 15 Feb 2011 07:02:24 +0000 http://www.mindat.org/forum.php?read,98,156549,156549#msg-156549 http://www.mindat.org/forum.php?read,98,156549,156549#msg-156549 www.theglobeandmail.com]]]> Maggie Wilson Meteorites Fri, 27 Nov 2009 16:11:10 +0000 http://www.mindat.org/forum.php?read,98,156530,156530#msg-156530 http://www.mindat.org/forum.php?read,98,156530,156530#msg-156530
thanks/johan]]> Johan Kjellman Meteorites Mon, 26 Oct 2009 13:43:09 +0000 http://www.mindat.org/forum.php?read,98,150008,150008#msg-150008 http://www.mindat.org/forum.php?read,98,150008,150008#msg-150008 Microdiamonds and meteorite impact structures
Saturday September 5, Miami University, Oxford, Ohio

Many people may have seen the recent PBS NOVA program called “Last Extinction”. If you have not you can watch it online or check for the next TV broadcast at [www.pbs.org] . Scientists propose a radical new idea of what killed off the mammoths and other large animals at the end of the last ice age; a major comet impact. Evidence for this and other impacts includes the presence of microdiamonds in Earth’s sediments.

The theme of the 2009 Midwest Chapter of the Friends of Mineralogy Symposium and field conference is “Microdiamonds and meteorite impact structures”. The conference will include presentations by several scientists working on different aspects of these topics as well as field trips to the Serpent Mound impact structure and proximal mineral collecting sites in south central Ohio.

The conference, being organized by Nelson Shafer (Indiana Geological Survey) and John Rakovan (Miami University), will be held Saturday, September 5 in the Department of Geology at Miami University, Oxford Ohio. Speakers will include Dr. Ken Tankersley (Department of Anthropology, University of Cincinnati), Dr. Andrew Phelps (Materials Physics Lab, University of Dayton) and Greg Schumacher (Ohio Department of Natural Resources
Division of Geological Survey)
Schedule

The meeting will be in the Karl E. Limper Geology Museum, Department of Geology, Miami University. It is located on the first floor (basement) of Shideler Hall, Room 8.

Directions can be found at: [www.cas.muohio.edu]

Parking at Miami University on weekends is free and does not require a permit. Two parking areas are convenient for the symposium. Bishop circle which is adjacent to Shideler Hall and Cook Field, which is across the street (Rt. 27/Patterson Ave.) from Shideler.

9 – 9:30 AM
Introduction by Nelson Shafer and John Rakovan

9:30 – 10:15
Dr. Ken Tankersley

10: 15 – 11:00
The Physics and chemistry of impact diamonds with examples from Popigai.
Dr. Andrew Phelps

11 – 11:45
The Impact of Ohio’s Extraterrestrial Visitor- Geology of the Serpent Mound Disturbance
Greg Schumacher

12 – 12:30 Lunch and Video “The Last Extinction”

12:30 – 1 Visit the Limper Geology Museum

1:00 PM Field Trip: Serpent Mound and Vicinity, OH]]> Alfredo Petrov Meteorites Thu, 27 Aug 2009 19:09:02 +0000 http://www.mindat.org/forum.php?read,98,149850,149850#msg-149850 http://www.mindat.org/forum.php?read,98,149850,149850#msg-149850 Gordon c De'young Meteorites Mon, 07 Feb 2011 16:38:13 +0000 http://www.mindat.org/forum.php?read,98,149121,149121#msg-149121 http://www.mindat.org/forum.php?read,98,149121,149121#msg-149121
While at the Springfield, Ma show earlier this month, I picked up a 42 gram piece of a "Meteorite" from Argentina. From what the information sheet advised, this chunk of rock had been "sliced, polished and etched."

Bear in mind that I picked this up for my 9 year old who I thought would get a kick out of taking it to school. Don't know a thing about Meteorites and don't collect them. I take it that these items are fairly common and not at all unique? I saw other folks selling these at the show-for less then I paid. Of course i noticed this after I made my purchase but, no worries. Any advice would be appreciated.]]> David Bernstein Meteorites Sun, 30 Aug 2009 06:01:27 +0000 http://www.mindat.org/forum.php?read,98,139518,139518#msg-139518 http://www.mindat.org/forum.php?read,98,139518,139518#msg-139518 1937 - 2009

O. Richard Norton passed away at Hospice House in Bend, Oregon, on May 17 after a long illness. A life-long educator and the author of popular books and articles about meteorites, astronomy and planetariums, Richard discovered his life’s passion when he built his first telescope at 14. His love for the sky and all things astronomical led him from an after-school job at Cave Optical Company in Long Beach, California, to a career in public science education.
While studying astronomy and meteoritics at UCLA, he was a lecturer at Griffith Observatory and Planetarium in Los Angeles. In 1957 he worked at the Nevada Test Site as a field researcher for the Atomic Energy Commission. There he witnessed the last 10 above-ground nuclear explosions and conducted research at the test site on the ecological effects of radiation. After graduation in 1960, he worked briefly as an optical engineer at Northrop Corporation and Tinsley Laboratories.
But he soon returned to his beloved planetariums. After 2 years at Morrison Planetarium in San Francisco, in 1963 he became Director of the University of Nevada’s Fleischmann Planetarium in Reno, where he also taught astronomy. There Richard designed the world’s first 35mm fisheye motion picture system, called the Atmospherium, which was used to project realistic time-lapse motion pictures of developing weather systems onto the interior of a planetarium dome. His first book, The Planetarium and Atmospherium, An Indoor Universe, was published in 1969. He was a planetarium design engineer and consultant for Minolta Camera Company in Osaka, Japan. Richard became the founding director of the University of Arizona’s Flandrau Planetarium in 1973, where he continued teaching and co-designed a fisheye projection camera system which flew on the Space Shuttle Challenger in 1984, producing the first full sky motion pictures from space. In 1978 he started Science Graphics, a company that manufactured sets of teaching slides in astronomy and other sciences for use in college level courses.
Richard loved teaching and sharing his enthusiasm for astronomy, the space program, photography, geology and telescope making. He gave public lectures and taught community education classes, even venturing into the Arizona State Penitentiary to teach in maximum security and protective custody. He led field trips to Cape Canaveral, where he had his fisheye cameras at most Apollo launches, and on solar eclipse trips around the world, from Mexico to Romania.
In 1986 he moved to Bend, where he taught astronomy at Central Oregon Community College for 7 years. In Bend he rediscovered his early passion for meteorites. His book Rocks From Space was published in 1994, followed by The Cambridge Encyclopedia of Meteorites in 2002. His wife Dorothy Sigler Norton, who is a scientific illustrator, produced the illustrations and cover designs. The Field Guide to Meteors and Meteorites, published in 2008, was co-authored with Bend geologist Lawrence Chitwood. Many of Richard’s meteorites are on display at the Sunriver Nature Center in Sunriver, Oregon.
Richard loved classical music and had studied piano since the age of 7. In Bend he started a series of concerts called the Four Seasons, which were held for more than 10 years at the Norton home on the equinoxes and solstices.
Richard is survived by his wife Dorothy, his sister Gloria Berg, three children from previous marriages and a granddaughter.]]> Matteo Chinellato Meteorites Fri, 05 Mar 2010 18:10:37 +0000 http://www.mindat.org/forum.php?read,98,132442,132442#msg-132442 http://www.mindat.org/forum.php?read,98,132442,132442#msg-132442
Thanks for everyone's help,
Robert]]> Jessica and Robert Simonoff Meteorites Sat, 04 Apr 2009 20:58:07 +0000 http://www.mindat.org/forum.php?read,98,132435,132435#msg-132435 http://www.mindat.org/forum.php?read,98,132435,132435#msg-132435 Matthew Boeck Meteorites Fri, 19 Aug 2011 06:09:40 +0000 http://www.mindat.org/forum.php?read,98,132059,132059#msg-132059 http://www.mindat.org/forum.php?read,98,132059,132059#msg-132059 Rock on!
- Matt Boeck -Palomar Club]]> Matthew Boeck Meteorites Thu, 26 Mar 2009 21:42:24 +0000