MLRA 58B - Northern Rolling High Plains, Southern Part Montana and Wyoming 50,810 km2 (19,620 mi2)

Soils:
Most of the soils are Orthents, Orthids, Argidg, and Fluvents. They are moderately coarse textured to fine textured and mainly well drained and have a mesic temperature regime. The nearly level to steep, shallow to deep Tomorthents (Kim, Thedalund, Samsil, Shingle, and Tassel series) and the nearly level to steep, moderately deep to very deep Haplargids (Cushman, Olney, Terry, and Vona series) are on sedimentary uplands. The nearly level to moderately sloping, moderately deep to very deep Camborthids (Zigweid and McRae series) and Paleargids (Bidman and Briggsdale series) are on alluvial fans, foot slopes, and terraces. The nearly level, deep Torrifluvents (Haverson, Glenberg, and Bankard series) are on flood plains and low stream terraces.

12/16/98