TY - BOOK T1 - Geochemical variation in a copper-bearing redbed sequence of the Ravalli Group (Belt Supergroup), northwestern Montana and northern Idaho DA - 1991. CY - Denver, Colo. : AU - Connor, Jon J. AU - Bartel, A. J. VL - 91-0028 A, 91-0028 B CN - I 19.76: PB - U.S. Geological Survey : PB - Books and Open-File Reports Section [distributor], PP - Denver, Colo. : PY - 1991. N1 - Cover title. N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 92-0531-M. N1 - Imprint and distribution information from transmittal sheet. N1 - Title on disk label: Geochemical variation, Ravalli Group redbeds NW Montana & N Idaho. N1 - Computer disk contains 22 files. N1 - Information on diskette not included in microfiche reproduction. ID - 217430 KW - Geochemistry KW - Geochemistry KW - Copper ores KW - Copper ores TI - Geochemical variation in a copper-bearing redbed sequence of the Ravalli Group (Belt Supergroup), northwestern Montana and northern Idaho ER -