Dakota Formation (SDKd;0)

Dakota Formation

Light- to reddish-brown, medium- to coarse-grained quartz and minor feldspar sandstone grading upward to a fine- to medium-grained, quartz and minor feldspar sandstone. Contains a middle, gray silty clay unit, and interbeds of gray to dark-gray shale in the upper portion. Thickness up to 450 ft (137 m).

State	South Dakota
Name	Dakota Formation
Geologic age	Upper to Lower Cretaceous
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed)Light- to reddish-brown, medium- to coarse-grained quartz and minor feldspar sandstone grading upward to a fine- to medium-grained, quartz and minor feldspar sandstone. Minor Sedimentary > Clastic > Mudstone > Shale (Bed)Interbeds of gray to dark-gray shale in the upper portion. Unconsolidated > Fine-detritalContains a middle, gray silty clay unit.
References	Tomhave, D.W., and Schulz, L.D., 2004, Bedrock Geologic Map Showing Configuration of the Bedrock Surface in South Dakota East of the Missouri River, South Dakota Geological Survey, GM 9, scale 1:500,000.
NGMDB product	NGMDB product page for 96370
Counties	Clay - Hutchinson - Lincoln - Turner - Union

Dakota Formation

Tomhave, D.W., and Schulz, L.D., 2004, Bedrock Geologic Map Showing Configuration of the Bedrock Surface in South Dakota East of the Missouri River, South Dakota Geological Survey, GM 9, scale 1:500,000.