TY - BOOK AU - Page,Norman J. ED - United States TI - Stillwater Complex, Montana: structure, mineralogy, and petrology of the Basal zone with emphasis on the occurrence of sulfides U1 - 552.109786 PY - 1979///. CY - Washington: PB - United States Government Printing Office, KW - Rocks, Igneous KW - Intrusions (Geology) KW - Montana KW - Stillwater County KW - Sulfides KW - Ore deposits N1 - Contuct diagr.: Vertical variation in orthopyroxene compositions and grain size from 15 cross sections of the basal zone; Contuct map: Interpretative maps and cross sections of the basal zone from mapping by page and Nokleberg (1974) and from drill-core logging; Includes bibliographical references (p. 61-65) and index (p. 67-69) ER -