Geology Surficial Material and Bedrock Thick glacial till over Tertiary sandstone and shale in the north and Cretaceous Pierre Shale in the south. Potential Natural Vegetation Western wheatgrass, bluestem, needleandthread, green needlegrass. Prairie cordgrass, northern reedgrass near wetlands. Land Use and Land Cover Cattle grazing on steeper land mixed with tilled agriculture of hay and spring wheat. Native prairie remaining on unbroken rangeland.
Wetlands provide wildlife habitat.