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Terrace deposits

Terrace deposits: gravel, sand, and silt of terrace remnants.
StateMontana
NameTerrace deposits
Geologic agePhanerozoic | Cenozoic | Tertiary Quaternary
Original map labelQTt
Primary rock typealluvial terrace
Secondary rock type
Other rock types
Lithologic constituents
Major
Unconsolidated > Fine-detrital (Terrace)
Unconsolidated > Coarse-detrital (Terrace)
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
Denson, N.M., Gibson, M.L. and Sims, G.L., 1992, Geologic and structure map of the north half of the Powder River basin, southeastern Montana and northeastern Wyoming: U.S. Geological Survey Miscellaneous Investigations Series Map I-2281-A, 1
Geographic coverageBeaverhead - Big Horn - Blaine - Carbon - Cascade - Chouteau - Deer Lodge - Fergus - Glacier - Golden Valley - Granite - Judith Basin - Lewis and Clark - Musselshell - Petroleum - Phillips - Pondera - Rosebud - Sheridan - Stillwater - Teton - Treasure - Wheatland

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