Lacustrine Sediments (SDQll;0)

State	South Dakota
Name	Lacustrine Sediments
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene [Upper Wisconsin]
Original map label	Qll
Primary rock type	clay or mud
Secondary rock type	silt
Other rock types	sand; gravel
Lithologic constituents	Major Unconsolidated > Fine-detrital > Silt (Lacustrine) Unconsolidated > Fine-detrital > Clay (Lacustrine) Minor Unconsolidated > Coarse-detrital > Gravel (Lacustrine) Unconsolidated > Coarse-detrital > Sand (Lacustrine)
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	Beadle - Brown - Campbell - Codington - Day - Deuel - Faulk - Hamlin - Hand - Hughes - Kingsbury - Lake - Marshall - Minnehaha - Potter - Roberts - Spink