Hi Tom, Pete and List,
Tom has been doing a fantastic job with his studies and I thank him for his
tireless efforts and for sharing with us. Before the realization that NWA
2828, Al Haggounia and the other pairings to NWA 2828 were found to be an
EL3 and NOT an aubrite, I spent many trips to Morocco buying up the "Blue"
material. Needless to say, I have several kilos of the "Blue" EL3 material,
one of the lucky first-in buyers, not price-wise but material-wise :-)
Here are some additional photo links of NWA 2828 "Blue", most have seen
these as they are the ones I have with my eBay description of NWA 2828.
Photograph of a 24.9g NWA 2828 slice with rhyolite pebble (image 1):
http://www.lunarrock.com/nwa2828/nwa2828pebble.jpg
Photograph of magnified radial pyroxene chondrule (image 2):
http://www.lunarrock.com/nwa2828/nwa2828chondrule.jpg
Photograph of magnified whitish enstatite-rich clast (image 3):
http://www.lunarrock.com/nwa2828/nwa2828clast.jpg
Photograph of a 14.3g complete slice of NWA 2828 (image 4):
http://www.lunarrock.com/nwa2828/nwa2828slice.jpg
Enjoy!
Greg
====================
Greg Hupe
The Hupe Collection
NaturesVault (eBay)
[EMAIL PROTECTED]
www.LunarRock.com
IMCA 3163
====================
Click here for my current eBay auctions:
http://search.ebay.com/_W0QQsassZnaturesvault
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, May 04, 2008 9:57 AM
Subject: Re: [meteorite-list] New or maybe old QUESTION??????
Hi Pete, IF you are looking for an affordable sample check out Al
Hagounia.
It matches your criteria and it is an Enstatite. NAU recently posted a
paper on their web site that nicely covers what it is, the terrestrial
alteration it has undergone, and it's location in the layers of sediment.
http://www4.nau.edu/meteorite/Meteorite/Al_Haggounia.html
The stuff is ugly on the outside but I have cut quite a few slices and it
is
interesting when cut. It takes a polish quite nicely. When you happen
to
cut into a large radial chondrule it is beautiful. A sea of fine grain
brown
with only one big fan shaped chondrule. Those polished examples make a
nice
display. Some times you get a "Blue" one! The Blue phase, NWA 2828 is
an
example, can be found mixed with the brown in the same slice. That is
not
common so it is fun when you find one. The best part is it is cheap
because
there is plenty to go around.
Tom Phillips
In a message dated 5/4/2008 1:09:56 A.M. Central Daylight Time,
[EMAIL PROTECTED] writes:
List,
Maybe this has been asked and answered (sounds like a lawer thing) and
maybe
not.
Since I am relatively new to collecting and certainly not an Expert in
any
area of meteorite study (with the exception of magnetisum (from the sky
magnetic VS made a magnet by processes here on earth).
Here's my question:
A geologist digs in an area that he thinks there will be the likelyhood
of
finding a fossil. Maybe he gets lucky and maybe finds bunches of them.
Has anyone ever found a meteorite buried deep in a layer that is
thousands
or even millions of years old?
Years ago--long before I became an obsessed, crazed, meteorite addict,
while teaching a series on earthquakes, I had found a video of a
scientist
standing with one foot on the Pacific plate and the other foot on the
North
Americian plate, ie astraddle of the San Andreas fault line. In back of
him
was a small vertical clift of maybe 10 feet and you could plainly see the
shift (approx 15 inches) in the layers of sediment.
Now I've got to thinking (some say this is my problem--Thinking) that
these
meteorites have a tremendous terestial age. If the earth is bombarded by
these meteorites throughout the aeons, then there should be a record, ie
evidence in the form of buried craters (see the Odessa,Tx crater) --
Approx
100 to 110 feet deep that has been filled in till it is only 25 to 30
feet
deep now due to wind blown sand (mostly). I've got a pamplet of
"Occasional
Papers of the Strecker Museum" from Baylor University showing a neat
cross
section of the Odessa Crater.
How much investigation into the cross section structure of the sediment
layers, looking for evidence of craters has been done? Has there ever
been
an accidential discovery of a buried crater in a clift side. Lots of
these
erroded mesa exist out west. Maybe evidence is visable there.
Surely Valeria is not the only animal killer out there.
Maybe another animal drilled by a passing meteorite with the coresponding
meteorite near the body. Maybe there's no body but the meteorite is still
there buried in the deeper layers of sediment. Maybe tektites are the
only
surviving evidence.
In a nutshell, has there ever been a meteorite found at a depth of
sediment
that is plainly very old?
Pete
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