MLRA 63B - Southern Rolling Pierre Shale Plains South Dakota and Nebraska 28,400 km2 (10,970 mi2)

Soils:
Most of the soils are Ustolls and Orthents. They are fine textured and very fine textured and have a mesic temperature regime and montmorillonitic mineralogy. Nearly level to rolling, well drained, moderately deep and deep Haplustolls (Opal and Promise series), Camborthids (Pierre, Kyle, and Swanboy series), and Ustochrepts (Lakoma series) are on uplands. Shallow Ustorthents (Okaton and Sansarc series) and Torriorthents (Samsil series) are on the steeper slopes. Poorly drained Haplaquolls (Kolls series) are in upland depressions. Well drained Argiustolls (Canning and Ree series) are on isolated high terraces along rivers and creeks. Ustifluvents (Munjor series) and Torrifluvents (Glenerg and Haverson series) are on the bottom land of major streams.

12/16/98