"The very high shock experienced by this specimen (causing complete recrystallization of silicates and evidently generation of significant amounts of microdiamond) is unusual among ureilites." Small adamantine crystals of diamond were extracted from the stone ... coarse-grained aggregate of olivine and orthopyroxene with finer grained interstitial regions containing opaque material, calcite and limonite. Some thin calcite veinlets cross-cut the specimen. Both olivine and pyroxene are completely recrystallized to aggregates of myriad tiny, polygonal subgrains.
NWA 6871... http://stores.shop.ebay.com/wanderingstarmeteorites Greg Catterton www.wanderingstarmeteorites.com ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
