North American Commission on Stratigraphic Nomenclature

R. Michael Easton, born in Toronto, has been a geologist with the Ontario Geological Survey since 1982, after studying at the University of Western Ontario (B.Sc. 1972), University of Hawaii, (M.Sc. 1976), and Memorial University of Newfoundland (Ph.D. 1982). He specializes in Proterozoic geology, with an emphasis on chronology, stratigraphy, and mapping. He is the author and coauthor of more than 60 geological maps and 150 papers. He was also the 1996 chair of the North American Commission on Stratigraphic Nomenclature (NACSN).James O. Jones (1935–1999) obtained his B.Sc. degree in geology from Midwestern State University in 1962; his M.Sc. degree from Baylor University in 1964; and his Ph.D. in geology from the University of Iowa in 1971. He first taught at Southern Arkansas University, but spent most of his career, from 1977 onward, at the University of Texas at San Antonio. He retired from the U.S. Army Reserve as a lieutenant colonel in 1995. He was the 1997 chair of the NACSN. Alfred C. Lenz spent most of his career teaching paleontology and stratigraphy at the University of Western Ontario, where he is now an emeritus professor. His primary research interest is the study of graptolites. He was the 1998 NACSN chair. Ismael Ferrusquia-Villafranca, born in Mexico City, obtained his B.Sc. degree in biology from Universidad Mexico in 1964 and his M.Sc. degree in paleontology in 1967 and his Ph.D. in geology in 1970, both from the University of Texas at Austin. He is a senior scientific researcher at the Instituto de Geologia, Universidad Nacional Autonoma de Mexico. He is the author and coauthor of more than 160 publications on the geology and vertebrate paleontology of Mexico. He was the 1999 NACSN chair. Ernest A. Mancini is the regional director of the Eastern Gulf Region of the Petroleum Technology Transfer …