[meteorite-list] How do you know?
From: meteorite1.com <capricorn89_at_meteoritecentral.com>
Date: Thu Apr 22 09:52:12 2004 Message-ID: <004401c2428d$d39b7dc0$df36b2d1_at_earthlink.net> This is a multi-part message in MIME format. ------=_NextPart_000_0041_01C24253.26BDFFE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thorny wrote <<...If this is true, how can the hundreds of uncut, = unclassified rocks from northwest Africa be passed off as meteorites? >> Good question Thorny: There are specific areas where, geologically, meteorites have = accumulated for tens (hundreds) of thousands of years. These areas are = flat and arid, and where erosion rather than deposition has occurred, = and the soil chemistry is not unfavorable to their preservation. Its = not that they are that easy to find, but the Berbers (native wandering = tribes) cover much territory and they have been taught how to recognize = possible meteorites in their travels, so in this way they are educated = to know what to look for. =20 Take, for example, the Dar al Gani (DaG) plateau in Libya. Its very = flat, dry, and meteorites stand out as different from the native rocks. = You still don't just "go there" and expect to pick them up. It is = necessary to spend literally weeks and months searching, and covering = much territory. And you need to know what to spot. This takes a = practiced eye. The finds may be many miles or tens of miles apart. Meteorites (meteorwrongs) brought to researchers here by the lay public = usually are not meteorites because the finders really don't know much = about what to look for in recognizing them. =20 If you go where the terrain is right, and the area is virtually = unsearched, given enough hours of searching and area covered, with an = experienced eye, you will find real meteorites. I can't imagine how many hundreds(?) of (native) people are hunting all = over Morocco and Algeria right now. Its like a great "gold rush". With = their economy, its well worth their time to be on the lookout for = possible meteorites. Most people who deal in meteorites know their = geology and petrology pretty well and can do well in spotting at least, = the more common types of meteorites. But not all suspected meteorites = turn out to be so; they still need to be classified not only to = determine to be accepted as authentic but also, and JUST AS IMPORTANT, = to know their chemistry and history of formation. This can only be done = using the electron microprobe and petrologic microscope (and of course a = trained geochemist with the experience). Hope this answers some of your questions. Ron R. N. Hartman METEORITES and MEMBRANE SUSPENSION BOXES rnh_at_meteorite1.com www.meteorite1.com order_at_membranebox.com www.membranebox.com Mailing address: The R. N. Hartman Collection METEORITES P.O. Box 94 Walnut, CA 91788-0094 (U.S.) ----- Original Message -----=20 From: thornysahuaro <thornysahuaro_at_yahoo.com> To: meteorite list <meteorite-list_at_meteoritecentral.com> Sent: Monday, August 12, 2002 8:07 PM Subject: [meteorite-list] How do you know? > Greetings to all. > I have been told that only one in one thousand rocks submitted to the > experts at the universities and other meteorite identification labs, = turns > out to be an actual meteorite. If this is true, how can the hundreds = of > uncut, unclassified rocks from northwest Africa be passed off as > meteorites? I'm not questioning that they all are, and I'm certainly = not > doubting any of the list members who are selling them. I just would = like > to know if there is some magical test. Is the Sahara, like the ice of > Antarctica, the test itself? Does any rock that sits on the sand > automaticly become a meteorite candidate because that is the only way = it > could have gotten there? > I've got on my asbestos BVD's, so light the flamethrowers. > Thorny >=20 > __________________________________________________ > Do You Yahoo!? > HotJobs - Search Thousands of New Jobs > http://www.hotjobs.com >=20 > ______________________________________________ > Meteorite-list mailing list > Meteorite-list_at_meteoritecentral.com > http://www.pairlist.net/mailman/listinfo/meteorite-list >=20 ------=_NextPart_000_0041_01C24253.26BDFFE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Diso-8859-1" = http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.2314.1000" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT size=3D2> <DIV>Thorny wrote <<...If this is true, how can the hundreds of = uncut,=20 unclassified rocks from northwest Africa be passed off as=20 meteorites? >></DIV> <DIV> </DIV> <DIV>Good question Thorny:</DIV> <DIV> </DIV> <DIV>There are specific areas where, geologically, meteorites have = accumulated=20 for tens (hundreds) of thousands of years. These areas are flat = and arid,=20 and where erosion rather than deposition has occurred, and the soil = chemistry is=20 not unfavorable to their preservation. Its not that they are that = easy to=20 find, but the Berbers (native wandering tribes) cover much territory and = they=20 have been taught how to recognize possible meteorites in their travels, = so in=20 this way they are educated to know what to look for. </DIV> <DIV> </DIV> <DIV>Take, for example, the Dar al Gani (DaG) plateau in Libya. = Its very=20 flat, dry, and meteorites stand out as different from the native = rocks. =20 You still don't just "go there" and expect to pick them up. It is=20 necessary to spend literally weeks and months searching, and covering = much=20 territory. And you need to know what to spot. This = takes a=20 practiced eye. The finds may be many miles or tens of miles apart.</DIV> <DIV> </DIV> <DIV>Meteorites (meteorwrongs) brought to researchers here by the lay = public=20 usually are not meteorites because the finders really don't know much = about what=20 to look for in recognizing them. </DIV> <DIV> </DIV> <DIV>If you go where the terrain is right, and the area is virtually = unsearched,=20 given enough hours of searching and area covered, with an experienced = eye, you=20 will find real meteorites.</DIV> <DIV> </DIV> <DIV>I can't imagine how many hundreds(?) of (native) people are hunting = all=20 over Morocco and Algeria right now. Its like a great "gold = rush". =20 With their economy, its well worth their time to be on the lookout for = possible=20 meteorites. Most people who deal in meteorites know their geology = and=20 petrology pretty well and can do well in spotting at least, the more = common=20 types of meteorites. But not all suspected meteorites turn out to = be so;=20 they still need to be classified not only to determine to be accepted as = authentic but also, and JUST AS IMPORTANT, to know their chemistry and = history=20 of formation. This can only be done using the electron microprobe = and=20 petrologic microscope (and of course a trained geochemist with the=20 experience).</DIV> <DIV> </DIV> <DIV>Hope this answers some of your questions.</DIV> <DIV> <P><B><FONT face=3D"Lucida Handwriting" size=3D4>Ron<BR></FONT></B><FONT = face=3DArial=20 size=3D1>R. N. Hartman<BR>METEORITES and MEMBRANE SUSPENSION = BOXES</FONT></P> <P><A href=3D"mailto:rnh_at_meteorite1.com"><FONT face=3DArial=20 size=3D1>rnh_at_meteorite1.com<BR>www.meteorite1.com</FONT></A></P> <P><FONT face=3DArial size=3D1><A=20 href=3D"mailto:order_at_membranebox.coom">order@membranebox.com<BR></A><A=20 href=3D"http://www.membramebox.com">www.membranebox.com</A></FONT></P> <P><FONT face=3DArial size=3D1>Mailing address:<BR>The R. N. Hartman = Collection=20 METEORITES<BR>P.O. Box 94<BR>Walnut, CA 91788-0094 = (U.S.)</FONT></P></DIV> <DIV> </DIV></FONT></DIV> <DIV><FONT size=3D2>----- Original Message ----- </FONT> <DIV><FONT size=3D2>From: thornysahuaro <<A=20 href=3D"mailto:thornysahuaro_at_yahoo.com">thornysahuaro@yahoo.com</A>></= FONT></DIV> <DIV><FONT size=3D2>To: meteorite list <<A=20 href=3D"mailto:meteorite-list_at_meteoritecentral.com">meteorite-list@meteor= itecentral.com</A>></FONT></DIV> <DIV><FONT size=3D2>Sent: Monday, August 12, 2002 8:07 PM</FONT></DIV> <DIV><FONT size=3D2>Subject: [meteorite-list] How do you = know?</FONT></DIV></DIV> <DIV><BR></DIV><FONT size=3D2>> Greetings to all.<BR>> I have been = told that=20 only one in one thousand rocks submitted to the<BR>> experts at the=20 universities and other meteorite identification labs, turns<BR>> out = to be an=20 actual meteorite. If this is true, how can the hundreds of<BR>> = uncut,=20 unclassified rocks from northwest Africa be passed off as<BR>>=20 meteorites? I'm not questioning that they all are, and I'm = certainly=20 not<BR>> doubting any of the list members who are selling them. I = just would=20 like<BR>> to know if there is some magical test. Is the Sahara, = like=20 the ice of<BR>> Antarctica, the test itself? Does any rock that = sits on=20 the sand<BR>> automaticly become a meteorite candidate because that = is the=20 only way it<BR>> could have gotten there?<BR>> I've got on my = asbestos=20 BVD's, so light the flamethrowers.<BR>> Thorny<BR>> <BR>>=20 __________________________________________________<BR>> Do You=20 Yahoo!?<BR>> HotJobs - Search Thousands of New Jobs<BR>> <A=20 href=3D"http://www.hotjobs.com">http://www.hotjobs.com</A><BR>> = <BR>>=20 ______________________________________________<BR>> Meteorite-list = mailing=20 list<BR>> <A=20 href=3D"mailto:Meteorite-list_at_meteoritecentral.com">Meteorite-list@meteor= itecentral.com</A><BR>>=20 <A=20 href=3D"http://www.pairlist.net/mailman/listinfo/meteorite-list">http://w= ww.pairlist.net/mailman/listinfo/meteorite-list</A><BR>>=20 </FONT></BODY></HTML> ------=_NextPart_000_0041_01C24253.26BDFFE0-- Received on Tue 13 Aug 2002 01:54:01 AM PDT |
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