Till, Moraine (SDQlt;0)

Heterogeneous, clay with silt to boulder-size clasts of glacial orgin. Exhibits a distinctive weathered, dissected surface.Typically overlain by up to 10 ft (3m) of loess. Thickness up to 150 ft (46 m).

State	South Dakota
Name	Till, Moraine
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene [Upper Wisconsin]
Original map label	Qlt
Primary rock type	clay or mud
Secondary rock type	silt
Other rock types	sand; gravel
Lithologic constituents	Major Unconsolidated > Coarse-detrital > Boulders (Glacial, till) Unconsolidated > Coarse-detrital > Gravel (Glacial, till) Unconsolidated > Coarse-detrital > Sand (Glacial, till) Unconsolidated > Fine-detrital > Silt (Glacial, till) Unconsolidated > Fine-detrital > Clay (Glacial, till)
Map references	Martin, J. E., Sawyer, J. F., Fahrenbach, M. D., Tomhave, D. W., and Schulz, L. D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey
Unit references	Martin, J. E., Sawyer, J. F., Fahrenbach, M. D., Tomhave, D. W., and Schulz, L. D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey
Geographic coverage	Brookings - Codington - Day - Deuel - Grant - Hamlin - Roberts