Johnson, M.G., and Todd, V.R., 1973, A summary of radiometric age determinations of igneous rocks from southeastern Arizona: Isochron/West, no. 8, p. 1-19. Authors Johnson, M.G., and Todd, V.R. Publication Date 1973 Citation Isochron/West, no. 8, p. 1-19. State AZ Province BR Keywords Geochronology Igneous More Keywords Geochronology, Igneous, Saddle Mtn. rhyolite (Galiuro Mts.) - Paleocene, AzGeoBib RefNum 4984