Most geoscientists who study granitic pegmatites have focused their efforts on one or two pegmatite localities that they know better than anyone else. This session provides an opportunity for those individuals to share the knowledge they have gained from such detailed study, and thereby inform others new to the field of the particular features of pegmatites and the methods that are useful for interpreting these complex bodies. Mineralogical and geochemical tools provide the basis for understanding petrology. Presentations that include specific case studies of mineral chemistry, isotope systematics, fluid inclusion history, experimental simulations, et cetera are welcome as a part of each presentation. However, the overall focus of this session is on the petrology of individual pegmatites, or the characteristics of pegmatites of a certain type or locale. Three invited speakers include: Lee A. Groat (University of British Columbia, Canada), who will speak about pegmatites of the Canadian Cordillera; Federico Pezzotta (Museum of Natural History, Milan, Italy), who will speak about the pegmatites of Madagascar; William B. "Skip" Simmons (University of New Orleans, Louisiana USA), who will speak about the pegmatite at Mt. Mica, Maine (USA). I will speak on the zonation of thin (San Diego County, California USA) versus thick (Tanco, Manitoba, Canada) subhorizontal layered pegmatites. The electronic abstracts submission form will appear on GSA's webpage around the first of April. Please understand that final approval and scheduling of this session is contingent upon a minimum of 12 abstracts being submitted to the session by the abstract deadline of midnight Pacific Time, 29 July. Feel free to contact me if you have any questions. David London Stubbeman-Drace Presidential Professor and Norman R. Gelphman Professor of Geology and Director, Electron Microprobe Laboratory ConocoPhillips School of Geology & Geophysics University of Oklahoma 100 East Boyd Street, Room 710 SEC Norman, OK 73019 (ph): 405-325-7626 (fax): 405-325-3140 visit PEGMATOPIA: http://pegmatopia.ou.edu visit the Pegmatite Interest Group: http://www.minsocam.org/msa/special/Pig/ visit our Electron Microprobe Laboratory: http://ors.ou.edu/Microprobe/OUEMPLhome.asp