TY - RPRT TI - U-Pb and Sm-Nd ages for the Stillwater Complex and its associated sills and dikes, Beartooth Mountains, Montana: Identification of a parent magma? AU - W. R. Premo AU - Rosalind Tuthill Helz AU - M. L. Zientek AU - R.B. Langston PY - 1990 DO - 10.1130/0091-7613(1990)018<1065:upasna>2.3.co;2 UR - https://pubs.usgs.gov/publication/70016058 ID - 70016058 ER -