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Article #88Re: Meteorite Collecting and Study
From: K3032E0
Date: Tue, 12 Jan 1993 10:04
Date: Tue, 12 Jan 1993 10:04
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2506 bytes
In my opinion, the best way is to go to a museum (or private collector) with a meteorite collection of at least a dozen differnet speciems: Old, weather- ed fragments and fresh (fusion crust|) Individuals of Stony-, Stony-Iron and Iron-Meteorites. Take also a close look at slices or cut speciems to learn how these space rocks look inside. Then go out and keep your eyes open. If you have discovered a possible meteorite, check for fusion crust, and estimate (or, even better, measure) it's density (But don't put it into water|||): Meteorites tend to be heavier than terrest.rocks. You may cut off a small piece.(but be careful the that the possible meteorite dosn't get too hot|) It should be easy to identify iron- or stony-iron meteorites by then. In case of stones, check for metal grains or chondrules. ALL (Stony-)Meteorites have much more iron than earth-rocks: Somwhere between 15% and 20% (except Lunar- and SNC-Meteorites). Check also weather a small magnet is attracted by the possible meteorite. Then, if you think it may be a stone from outer space, bring it to a museum or university for a careful analysis. By the way: That sound greart, but don't expect to find a meteorite on your next field trip. Here in Germany, Austria and Czech we have a camera-network to photograph bright meteors at night. (Just like the one that was operating in USA and Canada sometimes in the 1960s or so). You can calculate the impact- site to a few km^2 from these photographs, but of dozens (possibly hundrets) Pribram and Lost City). Last year possibly some 100kg of carb.Chondrite dropped into a forest near Prague, but not a single fragment has been found. You see, your chance to find a meteorite simply by chance is very remote| I know, you WILL ask if I ever found a meteorite: Sorry, no...| (You see, just words...) For your educational side, try these two books (hope I remember them right): * McSween: "Meteorites and their parent bodies" * Wasson: "Meteorites and their record of the early solar system" Hope you have lots of fun with these space-rocks| Herbert
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.univie.ac.at!alijku11!k3032e0 Organization: Johannes Kepler University Linz - Computing Center Date: Tue, 12 Jan 1993 11:04:02 CET From: <K3032E0@ALIJKU11.BITNET> Message-ID: <93012.110402K3032E0@ALIJKU11.BITNET> Newsgroups: alt.sci.planetary Subject: Re: Meteorite Collecting and Study Distribution: world References: <93011174@sloth.bc.ca> Lines: 37