Till, Ground Moraine (SDQltg;0)

Till, Ground Moraine

Heterogeneous, clay with silt to boulder-size clasts of glacial orgin. A geomorphic feature that is characterized by smooth, rolling terrain. Composite thickness of all Upper Wisconsin till may be up to 300 ft (91 m).

State	South Dakota
Name	Till, Ground Moraine
Geologic age	Pleistocene-Upper Wisconsin
Lithologic constituents	Major Unconsolidated > Fine-detrital (Glacial-till)compact, silty, clay-rich matrix Unconsolidated > Coarse-detrital (Glacial-till)sand to boulder-sized clasts of glacial origin
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, GM 10, scale 1:500,000.
NGMDB product	NGMDB product page for 72317
Counties	Corson - Dewey

Till, Ground Moraine

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, GM 10, scale 1:500,000.