General Soil Type:

Cm

Region:

C

Map Unit Description:

Well- to poorly- drained soils on terraces; most have

developed in alluvium of early to middle Pleistocene age under

a combination of coniferous forest and prairie vegetation;

many are base-rich

Moisture Regime:

Xeric, Aquic, and Udic/Mesic

Temperature Regime:

Mesic

Taxonomic Classification:

Ultic Argixerolls, Typic Fragiumbrepts, Ultic Palexeralfs,

Aquic Hapludolls

Major Soil Series:

Hillsboro-Dollar-Kelso-St. Martin