[meteorite-list] New or maybe old QUESTION??????

[STARSANDSCOPES at aol.com]

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,  
pshugar at clearwire.net 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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