|Name||Granite (eastern bedrock)|
|Geologic age||Upper Archean|
Igneous > Plutonic > Granitic > GraniteFelsic coarse-grained granite.
Unconsolidated > Fine-detritalIncludes white, silty clay weathering residuum.
Sedimentary > Clastic > SiltstoneA pink, white, and gray siltstone.
|Comments||Another unit labeled Wgr exists in SD001 and has a different description. Changed unit label to Wgr2 to distinguish this unit from the other.|
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.