Belle Fourche shale (MTKbf;0)

State	Montana
Name	Belle Fourche shale
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Late
Original map label	Kbf
Primary rock type	shale
Secondary rock type	bentonite
Other rock types	sandstone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Incidental Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed) Sedimentary > Clastic > Sandstone (Bed)
Map references	Ross, P.R., Andrews, D.A., and Witkind, I.J., 1955, Geologic map of Montana: U.S. Geological Survey, 2 sheets, scale 1:500,000.
Unit references	Stebinger, E., 1914, Titaniferous magnetite beds on the Blackfeet Indian Reservation, Montana: U.S. Geological Survey Bulletin 540, p. 329-337. [http://pubs.er.usgs.gov/publication/b540] Knechtel, M.M. and Patterson, S.H., 1956, Bentonite deposits in marine Cretaceous formations, Hardin district, Montana and Wyoming: U.S. Geological Survey Bulletin 1023, 116 p. [http://pubs.er.usgs.gov/publication/b1023] Merewether, E.A., 1996, Stratigraphy and tectonic implications of Upper Cretaceous rocks in the Powder River basin, northeastern Wyoming and southeastern Montana, in Evolution of sedimentary basins--Powder River basin: U.S. Geological Survey Bul [http://pubs.er.usgs.gov/publication/b1917T] Knechtel, M.M. and Patterson, S.H., 1955, Bentonite deposits of the northern Black Hills district, Montana, Wyoming, and South Dakota: U.S. Geological Survey Miscellaneous Field Studies Map MF-36, 2 sheets, scale 1:48,000. [Also, U.S. Geologi [http://pubs.er.usgs.gov/publication/mf36] Robinson, C.S., Mapel, W.J. and Bergendahl, M.H., 1964, Stratigraphy and structure of the northern and western flanks of the Black Hills uplift, Wyoming, Montana, and South Dakota: U.S. Geological Survey Professional Paper 404, 134 p. [http://pubs.er.usgs.gov/publication/pp404] Vuke, S.M., Wilde, E.M., Bergantino, R.N., Colton, R.B., 2001, Geologic map of the Alzada 30' x 60' quadrangle, eastern Montana: Montana Bureau of Mines and Geology Open File Report 433, scale 1:100,000. Cobban, W.A., 1951, Colorado shale of central and northwestern Montana and equivalent rocks of the Black Hills: American Association of Petroleum Geologists Bulletin, v. 35, no. 10, p. 2170-2198. Rubey, W.W., 1931, Lithologic studies of fine-grained Upper Cretaceous sedimentary rocks of the Black Hills region, IN Shorter contributions to general geology, 1930: U.S. Geological Survey Professional Paper 165-A, p. A1-A54. [http://pubs.er.usgs.gov/publication/pp165A] Knechtel, M.M. and Patterson, S.H., 1962, Bentonite deposits of the northern Black Hills district, Wyoming, Montana, and South Dakota, in Contributions to economic geology, 1958: U.S. Geological Survey Bulletin 1082-M, p. M893-M1030. [http://pubs.er.usgs.gov/publication/b1082M]
Geographic coverage	Carter