Robert Verish writes: > "that shock and weathering grades were problematic for > pairing purposes" but they had no problem with petrologic > class (or metamorphic grade). In fact, they used a noble > gas isotope study to prove that all the L6 specimens were > indeed, paired to the same fall!
Of course, you are absolutely right. I think am getting old: I can't remember the contents of a paper that I have read only a few weeks ago... :-( I just don't know if there were L4 or L5 specimens found inside the proposed L6 strewfield that were excluded form the pairing *just because* they were of a different metamorphic grade...? I still think that there might be fuzzy borders between metamorphic grades, or that a small thin section is not representative for the whole specimen. Bob's thought that the different petrologic classes in the Gold Basin shower would indicate a rubble pile meteorid as the parent body is excellent. I just want to caution that there might be uncertainties in the assignement of metamorphic grades, but I am no scientist, so I don't really know. Just my three (Euro) Cents worth of thoughts... Greetings, Herbert ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
