Cretaceous, undifferentiated (MTKu;0)

State	Montana
Name	Cretaceous, undifferentiated
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous
Original map label	Ku
Primary rock type	mudstone
Secondary rock type	sandstone
Other rock types	limestone
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Mudstone (Bed) Minor Sedimentary > Carbonate > Limestone (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	Schmidt, R.G., 1972, Geologic map of the Coburn Mountain quadrangle, Lewis and Clark and Cascade Counties, Montana: U.S. Geological Survey Geologic Quadrangle Map GQ-975, 1 sheet, scale 1:24,000. [http://pubs.er.usgs.gov/publication/gq975] Harrison, J.E., Whipple, J.W., and Lidke, D.J., 1998, Geologic map of the western part of the Cut Bank 1° x 2° quadrangle, northwestern Montana: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-2593, scale 1:250,000. [http://pubs.er.usgs.gov/publication/i2593] Mudge, M.R., and Earhart, R.L., 1983, Bedrock geologic map of part of the northern disturbed belt, Lewis and Clark, Teton, Pondera, Glacier, Flathead, Cascade and Powell Counties, Montana: U.S. Geological Survey Miscellaneous Geologic Investigations Seri [http://pubs.er.usgs.gov/publication/i1375]
Geographic coverage	Flathead - Glacier