Sterling wrote: "People who understand thin sections are invited to comment in reply"
Hi Sterling and List, Unfortunately these thin section pics are very low-resolution so it is hard to judge from these low-quality pictures. But let's try and others, like John Kashuba, are invited to chime in. The dark areas in the cross-polarized image are probably opaque minerals (metal, troilite, etc.) and the conclusion we can draw is that this meteorite is metal- and FeS-rich, in other words an H5 or H6 chondrite (I think Mike Farmer already said so in one of his first mails). On the left, in the nine o'clock position there is a small, circular chondrule that has a thick, igneous rim of, well, I guess olivine (vivid purplish red) and pyroxene (blue tints ... pigeonite ???). Between this chondrule and an even smaller chondrule right of center (tiny BO chondrule???), there is a "conglomerate" of what may have been one or several large BO chondrules (chondrule fragments). This causes a bit of headache because, if this is or was a large BO chondrule, I wouldn't rule out an L chondrite as H chondrites tend to have smaller chondrules! Right above center, there is what looks like a POP (porphyritic olivine-pyroxene) chondrule about the same size as the one in the nine o'clock position. The overall texture is that of a recrystallized chondrite (H5 or H6, L5 or L6) but as the chondrule in the 9 o'clock position is relatively unaltered as is the small one right of center, I'd say it might be an H5 or an L5. Best wishes, Bernd (who neither owns Cali nor Carancas) ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list