Re: [meteorite-list] Park Forest fall
At 11:31 PM 3/28/2003 -0700, Michael Farmer wrote: I am also saddened, the people here mostly still have their stones, they think they hit the lotto and made millions. Well, in defense of the common man here, imagine yourself as someone who knows squat about meteorites except for tidbits that cross the news every now and then that tell of a SNC or Lunar selling for a crazy amount of money. Then all of a sudden you have one fall in your yard, it's all over TV, dealers are swooping in and setting up tables to buy it, Museums are clamoring for it - what would you think? I would think I'd hit the jackpot too. As a meteorite enthusiast, I think this would be the perfect time for some meteorite education. Set up a lecture one night to tell people about the different types of meteorites, maybe even have a few to show. Explain why some are really valuable and some aren't quite so valuable. A meteorite saavy public probably would have avoided much of this. After all, in everything, ignorance is our worst enemy. Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteor Chunks Crash In South Suburb - Illinois - STONES RECOVERED
"People are being urged to "turn over" finds to the scientific community." I want to know, do we have to? Why would the scientific community need all the stones? Is it like the old woman meteorite where they cut of 600 or so pounds to study? Thanks, Tom The proudest member of the IMCA 6168 Speaking as a science minded person, some analysis do take up a lot of material. But this does raise a question I've been thinking about for a long time though that I would like to hear what you guys think - if the science on these rocks hadn't been done - if no one had studied achondrites, chondrites, and irons to know where they come from or why they are so special - do you think they would still be as interesting to dealers/collectors and command the money that is paid out for them now? Thanks for your thoughts on this. Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] triolite inclusions
At 09:19 PM 1/27/2003 -0500, LabNEMS wrote: Steve: Troilite is FeS. A terrestrial analog is the mineral Pyrrhotite Fe(1)S. Any troilite "cavities" are probably what is referred to as "vugs" that may (or may not) have contained troilite but went from a solid to a gas from shock. Evidence of this would be in the mineralogy of the vug's lining. Russ Kempton, NEMS www.meteorlab.com Isn't Pyrrhotite Fe(1-x)S? I think it was in 1863 that troilite was shown to be distinct from pyrrhotite. Troilite has been found in terrestrial settings, notably the serpentine of Del Norte County, Ca.; ultramafic inclusions in the Sally Malay deposit in Australia; as flecks in marble in Glenelg, Scotland; igneous deposits in China and in the Velfjord-Tosen region in Norway as part of some metasediments. (No I don't have all that on the tip of my tongue - my mineralogy professor made us write term papers on a mineral and I chose troilite.) Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Recent fireballs.
Sorry to bother the list with a question like this, but does anyone know if any fireballs have been sighted in the past few weeks in the New England area (particularly in and/or around New Bedford, MA)? Is there a web site that lists all reported fireballs? Thanks for any help you can offer. Steven __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re: Where on Earth Is Mars? Try sherghotty
Mr. Grondine, You lost me there in that email and I'd appreciate some clarification. Specifically - In other words, unlike Etna, there is no magma involved in these martian "volcanoes" - and this may be seen in the Observor and Surveyor imagery, where the impact structures formed by impacts into most of these martian volcanoes' "lava' fields clearly show that the fields are not composed of lava. I'm certain no one believes that there is currently any lava on the martian surface, just the rocky remnants (weathered basalt in my opinion but that's a horse of another color). Are you saying that lava flows *never* existed on Mars? Thanks for any clarification you can provide. Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Missing Ureilite.
Hello all, I have a question for the list, maybe this has come up before, maybe some of you know this as common knowledge. I was reading an old article from Meteoritics - "Igneous petrology of the new ureilites Nova 001 and Nullarbor 010" by Treiman and Berkley, v. 29, p843. In there is a statement "The Nullarbor 010 ureilite was found in 1991 as a 350-g stone; the location of only ~1-g is known." Where are the other 349-g of it? Could it be that the finder truly wanted to remain anonymous? But then why put in this statement? Is there really 349 g of missing ureilite? Everyone empty your pockets at the door.. Thanks, Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Buzz pops jerk
Good on Buzz, I've been involved in several discussion on whether or not we went to the moon with conspiracy theorist over the past few years and they always wave these photos and movies around and shout about abnormalities in them. It's interesting though to see them squirm when you ask them to explain where the 480 kilos of moon rocks came from then if we didn't go. At 10:52 AM 9/11/2002 -0600, Martin Horejsi wrote: >Hi all and thanks for opening this cryptically subjected email. > >I thought it might be of interest to some of you that Buzz Aldrin punched a >filmmaker who ambushed him and, I quote, "approached him and asked him again >to swear on a Bible that he went to the moon, and told him he was a thief >for taking money to give an interview for something he didn't do." > >Anyway here is the CNN link to the story: > >http://www.cnn.com/2002/TECH/space/09/10/aldrin.skeptic.reut/index.html > >Also, I think it would be a good idea to show solidarity behind this kind >of nonsense, and form a legal defense fund for Buzz so he can feel free to >punch these guys at will without worry about financial loss due to legal >fees. Maybe a buck from each person on this list would symbolic enough. > >Cheers, > >Martin Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question clarification - How to cut "thin sections"
If you are talking about thin sections that are commonly used to classify a meteorite, those are 30 microns thick (as all thin sections should be if you want to do petrography). They are extremely difficult to make and I think producing a quality thin section borders on art. I've been doing it for some time now for my own research, but the ones I make can't compare with some made by professional thin section makers. The VERY best thin sections I have ever seen are made by a 70+ Dutch gentleman who cuts thin sections for the TCU geology dept. No need contacting him though because he only does stuff for the dept. It'll take lots of practice and patience to make a good one until you get the knack of it. Good luck. At 08:31 AM 8/15/2002 -0400, Morawski, Mark wrote: >Thanks to the people who responded quickly. To clarigy my question, the >thin sections I was referring to were the super thin ones that are >"translucent" and typically mounted to glass. > Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Ron's re-post
> >Those "theories" must be consistant with your "wait for the Egyptian >newspaper" idea, right? > >One astute list member said of the dog story, "Extraordinary claims require >extraordinary proof." > >You have no scientific proof that a dog ever existed - extraordinary or even >ordinary. You have a "personal belief". > >Maybe you should start a cult > >Kevin Kichinka Kevin, Ron, and the rest - Good day to you all! In the past I've deleted all the posts about the "Dog" before even opening them but I've been reading the past few days worth and just have one question - So what? If the meteorite did or did not kill the dog - why does it inflame people so either way? At the end of the day we still have this wonderful martian meteorite that has stimulated much discussion and experimentation leading us to a better understanding of the red planet. I don't think that by hitting the dog it would have altered its mineralogy or chemistry in anyway so I don't really care if the poor dog died of a meteorite strike or crocodile attack. But, if I can hook a room full of students with a story about a dog supposedly being killed by a meteorite fall, then I'll shamelessly use it. Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Lunar Meteorite Density
Steven, If you know the minerals in the meteorite all you have to do is look up their density. If it's mostly feldspar the meteorite density will be the density of feldspar (sorry don't have my books with me at the moment but a google search will turn it up easily). That should work fairly well for a lunar anorthosite or any other mono or di-mineralic meteorites (ureilites etc). You can't do it (easily) that way for a chondrite because of the multiple phases and uncertainty in how much of what is present. Hope that helps get you started. At 09:40 PM 7/21/2002 -0400, [EMAIL PROTECTED] wrote: >Good evening list, >Question for the list. Can anyone point me in the direction if anyone has >ever taken Lunar Meteorite samples and performed density tests? As I >understand it, ordinary meteorites has density of the scale of 3.5 to 3.7. >Would a lunar sample be in the neighborhood of 2.7? > >Has there been any research or papers done on this topic? Please advise. > >Thanks in advance, and best to all. > >Steven L. Sachs IMCA# 9170 Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite Contest #4 - Meteorites are Educational Because....
Meteorites are educational because they allow the teacher to capture the imagination of the student. A physicist can slide a block of wood down a ramp, a chemist can make red water turn blue and back again, a mathematician can give you long formulas and explain the world with much rigor, but a teacher with a meteorite can do what no other can. A teacher with a meteorite can put in a student's hand: a piece of the oldest material known, a witness to the creation of the Earth, a rock that has fallen from heaven, a piece of an ancient star that exploded, a piece of Mars or a piece of the Moon. Meteorites are educational because they can quiet a room full of rowdy fourth and fifth grade students and turn Jr. high school teenagers from apathetic and angst filled inmates into attentive and inquisitive students. I say to other educators - "take your block, your acid and your equations and do what you will. I will send you students eager to learn each of your fields with one stone from the sky" This is why I have chosen to study meteorites :) Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Giant Dinosaurs Arrived With A Bang
whoops, never mind. A few minutes of research reveal that Indocetus ramani (earliest known whale form) is from the lower Eocene - long after our controversial impact. At 03:30 PM 5/17/2002 -0400, S.Singletary wrote: >At 12:22 PM 5/17/2002 -0700, Edward Hodges wrote: > >>Fred- The Komodo Dragon wasn't around 65 million years ago, and either >>were crocodiles like the ones you see now. They have evolved to become a >>more effeciant and smaller predator. So, can you think over any large >>Reptiles, that have survived for at least the last 65 million years that >>are still the same size? The point is that all large creatures were wiped >>out 65 million years ago. It's not clear if the impact killed them, if >>the nuclear winter killed them, if they starved, or were wiped out by >>viruses. The fact remains that ALL large creatures were wiped from the >>face of the earth, with the possible exception of some sea creatures, 65 >>million years ago by or from the effects of a large impact. By the way, >>10ft., and 25 ft. are hardly large animals when compared to the large >>animals that existed pre-impact. > > >What about whales? Anyone know when the first whales appear in the fossil >record? I seem to remember something about a fossil find in the >afghan/pakistan region that was thought to be transitional between whales >as we know them and a land bound animal. Don't know the age of the find >though. Pakicephalus I think was the name but I am definitely not >positive about that. > >Steven > > > >Steven Singletary >54-1224 >Dept. Earth, Atmospheric and Planetary Sciences >M.I.T. >Cambridge, MA 02139 >Tel - 617.253.6398 >Fax - 617.253.7102 > > >__ >Meteorite-list mailing list >[EMAIL PROTECTED] >http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Giant Dinosaurs Arrived With A Bang
At 12:22 PM 5/17/2002 -0700, Edward Hodges wrote: >Fred- The Komodo Dragon wasn't around 65 million years ago, and either >were crocodiles like the ones you see now. They have evolved to become a >more effeciant and smaller predator. So, can you think over any large >Reptiles, that have survived for at least the last 65 million years that >are still the same size? The point is that all large creatures were wiped >out 65 million years ago. It's not clear if the impact killed them, if the >nuclear winter killed them, if they starved, or were wiped out by viruses. >The fact remains that ALL large creatures were wiped from the face of the >earth, with the possible exception of some sea creatures, 65 million years >ago by or from the effects of a large impact. By the way, 10ft., and 25 >ft. are hardly large animals when compared to the large animals that >existed pre-impact. What about whales? Anyone know when the first whales appear in the fossil record? I seem to remember something about a fossil find in the afghan/pakistan region that was thought to be transitional between whales as we know them and a land bound animal. Don't know the age of the find though. Pakicephalus I think was the name but I am definitely not positive about that. Steven Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Tektite Identification
They are differentiated based on composition. They can (and do) look the same. (From L. Elkins, our resident tektite expert). At 02:18 PM 4/5/2002 -0600, Treiman, Allan wrote: >A further question -- > > How can you tell one kind of tektite from another? >Say an australite from a bediasite from a small >indochinite? > > Allan Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorites Hold Clues To Early Solar System
I just read the Feb. 8 Science paper, literally poured over it and I didn't find any mention of dating pieces of the CAIs. It dealt mostly with oxygen isotopes and some important stuff came out, but no date information. What chronometer did they use? U-Pb? If so, did they do the perovskites? Is it possible the article reference was in error? At 08:21 AM 2/21/2002 -0800, Ron Baalke wrote: >http://starbulletin.com/2002/02/19/news/story13.html > >Meteorites Hold Clues To Early Solar System >By Helen Altonn ([EMAIL PROTECTED]) >Honolulu Star-Bulletin >February 19, 2002 > >UH scientists report that planets may have formed very quickly > >Mineral findings in two meteorites studied by University of Hawaii >scientists and mainland colleagues may change thinking about the solar >system's age. > >If their analysis of two major components is correct, "the whole idea about >the chronology of the solar nebula can be wrong," said Alexander Krot, >associate researcher at the Hawaii Institute of Geophysics and Planetology. > >The researchers have dated one component at 4.568 billion years, plus or >minus 1 million or 2 million years, and they will try next to define the >absolute age of the second major component. Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SNCs
At 11:29 AM 2/16/2002 -0600, Jamie Ekholm wrote: >I am just curious. Does anyone know why it seems Shergottites are more >common than Nakhlites or Chassignites? It just seems that if a new >Martian meteorite is found, you can almost bet it will be a >Shergottite. Is it just that they had a better chance of surviving the >journey from impact on mars to the fall through our atmosphere? > >Jamie There could be any number of reasons for that. The impactor that sent the SNCs on their way here could have hit an area composed dominantly of shergottite type rocks or if there were multiple impacts, the distribution of the types of SNCs could be telling us something of the distribution of rock types on Mars. As the SNCs are closely related in physical properties, if not mineralogically, I don't think it tells anything about re-entry survival characteristics. Anyone else got any ideas? Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] More on CAIs
Just a follow up to Bernd's post, I've been reading a lot on CAI's lately so this discussion is great, keep it going. Have a look at: Hsu, W., et al., 2000, High Time resolution by use of the 26Al chronometer in the multistage formation of a CAI Earth and Planetary Science Letters, 182, p.15-29. They are indeed complicated little beasties. At 02:22 PM 2/11/2002 +0100, Bernd Pauli HD wrote: >SRINIVASAN G. et al. (2001) Ca-K and Al-Mg studies of CIAs >from CH and CR chondrites (MAPS 36-9, 2001, A196, excerpt): > >The CAIs from CR chondrites both with grossite and those with melilite >and hibonite have uniform 26Al abundance suggesting that they formed >within a narrow interval of time from the same reservoir. > > >Cheers, > >Bernd Steven Singletary 54-1224 Dept. Earth, Atmospheric and Planetary Sciences M.I.T. Cambridge, MA 02139 Tel - 617.253.6398 Fax - 617.253.7102 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
