Hello Dave and List, 1. Jeff Grossman wrote this in 1998 (private communication) about Açfer 160, classified as an LL3.8-6 chondrite:
The hyphen implies a continuous range, and also implies that there is no dominant lithology in the breccia. Acfer 160 could be: a) a type 3 chondrite with a single equilibrated clast found; b) a type 6 chondrite with a single type 3 clast found; c) a mixture of types 3, 4, 5, and 6 material; d) a light-dark breccia with mostly comminuted matrix and only a few clasts, including type 3 and 6 ones. 2. David Weir once wrote to the List: "Based on the conventions followed by the NomCom as stated in the intro to every Bulletin, for chondrite groups, petrologic types, shock stages, and weathering grades, slashes (e.g., H5/6) indicate transitional assign- ments. Hyphens in petrologic type assignments for chondrites (e.g., H5-6) indicate the range of types observed in breccias. Group names such as "L(LL)" indicate uncertain assignments, with the less probable group in parentheses." Regards, Bernd ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
