[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>

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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

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<DIV><FONT size=3D2>
<DIV>Thorny wrote &lt;&lt;...If this is true, how can the hundreds of =
uncut,=20
unclassified rocks from northwest Africa be passed off as=20
meteorites?&nbsp;&gt;&gt;</DIV>
<DIV>&nbsp;</DIV>
<DIV>Good question Thorny:</DIV>
<DIV>&nbsp;</DIV>
<DIV>There are specific areas where, geologically, meteorites have =
accumulated=20
for tens (hundreds) of thousands of years.&nbsp; 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.&nbsp; 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.&nbsp; </DIV>
<DIV>&nbsp;</DIV>
<DIV>Take, for example, the Dar al Gani (DaG) plateau in Libya.&nbsp; =
Its very=20
flat, dry, and meteorites stand out as different from the native =
rocks.&nbsp;=20
You still don't just "go there" and expect to pick them up.&nbsp; It is=20
necessary to spend literally weeks and months searching, and covering =
much=20
territory.&nbsp;&nbsp; And you need to know what to spot.&nbsp; This =
takes a=20
practiced eye. The finds may be many miles or tens of miles apart.</DIV>
<DIV>&nbsp;</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.&nbsp; </DIV>
<DIV>&nbsp;</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>&nbsp;</DIV>
<DIV>I can't imagine how many hundreds(?) of (native) people are hunting =
all=20
over Morocco and Algeria right now.&nbsp; Its like a great "gold =
rush".&nbsp;=20
With their economy, its well worth their time to be on the lookout for =
possible=20
meteorites.&nbsp; 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.&nbsp; 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.&nbsp; 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>&nbsp;</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>&nbsp;</DIV></FONT></DIV>
<DIV><FONT size=3D2>----- Original Message ----- </FONT>
<DIV><FONT size=3D2>From: thornysahuaro &lt;<A=20
href=3D"mailto:thornysahuaro_at_yahoo.com">thornysahuaro@yahoo.com</A>&gt;</=
FONT></DIV>
<DIV><FONT size=3D2>To: meteorite list &lt;<A=20
href=3D"mailto:meteorite-list_at_meteoritecentral.com">meteorite-list@meteor=
itecentral.com</A>&gt;</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>&gt; Greetings to all.<BR>&gt; I have been =
told that=20
only one in one thousand rocks submitted to the<BR>&gt; experts at the=20
universities and other meteorite identification labs, turns<BR>&gt; out =
to be an=20
actual meteorite.&nbsp; If this is true, how can the hundreds of<BR>&gt; =
uncut,=20
unclassified rocks from northwest Africa be passed off as<BR>&gt;=20
meteorites?&nbsp; I'm not questioning that they all are, and I'm =
certainly=20
not<BR>&gt; doubting any of the list members who are selling them. I =
just would=20
like<BR>&gt; to know if there is some magical test.&nbsp; Is the Sahara, =
like=20
the ice of<BR>&gt; Antarctica, the test itself?&nbsp; Does any rock that =
sits on=20
the sand<BR>&gt; automaticly become a meteorite candidate because that =
is the=20
only way it<BR>&gt; could have gotten there?<BR>&gt; I've got on my =
asbestos=20
BVD's, so light the flamethrowers.<BR>&gt; Thorny<BR>&gt; <BR>&gt;=20
__________________________________________________<BR>&gt; Do You=20
Yahoo!?<BR>&gt; HotJobs - Search Thousands of New Jobs<BR>&gt; <A=20
href=3D"http://www.hotjobs.com">http://www.hotjobs.com</A><BR>&gt; =
<BR>&gt;=20
______________________________________________<BR>&gt; Meteorite-list =
mailing=20
list<BR>&gt; <A=20
href=3D"mailto:Meteorite-list_at_meteoritecentral.com">Meteorite-list@meteor=
itecentral.com</A><BR>&gt;=20
<A=20
href=3D"http://www.pairlist.net/mailman/listinfo/meteorite-list">http://w=
ww.pairlist.net/mailman/listinfo/meteorite-list</A><BR>&gt;=20
</FONT></BODY></HTML>

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Received on Tue 13 Aug 2002 01:54:01 AM PDT


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