Hello All, Jim Wooddell inquired:
"what types of crystal twinning do we see the most in OC's?" Alan Rubin kindly posted: "The most common type of twinning in chondrules in unmetamorphosed chondrites is found in low-Ca clinopyroxenes. It is polysynthetic twinning -- it looks like the pyroxene grains have narrow stripes. These disappear when temperatures go above 630 C or so and won't be found in orthopyroxene." Interesting additional information can be found in our late O.R. Norton's book: => NORTON O.R. (2008) Field Guide to Meteors and Meteorites <= ... on these pages: 217 (Figure 11.18), 228 (Figure 11.44), 241 (Minerals in Meteorites) Bernd ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
