Durant soils have argillic horizons and occur on broad ridgetops or flats. Grainola soils have sola less than 40 inches thick and lack A horizons with moist chroma of 1 and usually occur on similar landscapes. Shidler soils have sola less than 20 inches thick over hard limestone bedrock and occur on ridges. Mainly used for range. The native vegetation is a mixture of tall and mid grass prairie.
Minor acreage is cultivated to small grains, grain sorghum, or tame pasture.
Grand Prairie of Oklahoma. The series is of moderate extent. These soils were formerly included in the Heiden series.