[meteorite-list] Al Haggounia 001 NWA 2965 and NWA 2828 I found a slice that sugests brec...

[STARSANDSCOPES at aol.com]

Hi all,  I know the question concerning Al  Haggounia  001 or common pairings 
of NWA 2965 and NWA 2828 have been on the  list for some time but this is 
still interesting.  Some firmly stand by the  call of EL3 and others Aubrite.

NWA 2965 is commonly associated with the  bark brown phase and NWA 2828 with 
the "Blue" phase.  As they both come  from the same location, the theory of 
the differences between the two is  centered in different weathering processes 
or extent of weathering.   

I have seen structure differences in the two when viewed at high  
magnification and because of this I have cut hundreds of fragments looking for  an 
example with both material in one stone.  I have seen examples of Blue  phase 
stained brown (and presented as both phases) in one slice but I have never  
personally seen it in hand or been convinced by a photo.

I just cut a  710gr individual with both and it looks like a breccia not a 
gradual transition  but clear one material and then the other.

My contention is this material  is a breccia and perhaps, two different types 
are present.

Tom Phillips 



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