[meteorite-list] A statement in regards to NWA 3133

[David Weir]

So, this seems to me to possibly represent a case of a heterogeneous 
layer of a common asteroid, with one area having experienced more 
intense heating with accompanying partial melting (NWA 3133 = PAC), 
while an adjacent area experienced only enough heat to produce the 
properties of a metamorphic grade 7 (NWA 1839). I believe the Portales 
Valley meteorite may exhibit a similar disproportionate heating event, 
and a similar dichotomy in classification - H7 vs PAC/or impact melt, 
depending on which section one studies.

David

Jeff Grossman wrote:

> That said, I have to disagree with Adam... the two descriptions are 
> extremely similar to each other.