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.
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