4.                            C A S C A D E S                                                                                                                                                                                                                                                                                                                                                                             

      Level IV Ecoregion                                   Physiography                                                              Geology                                                                          Soil                                                                        Climate                                            Potential Natural                         Land Use and Land Cover    
                                Area                                                           Elevation /                  Surficial material and bedrock                Order (Great Groups)                             Common Soil Series                Temperature  /     Precipitation     Frost Free      Mean Temperature                       Vegetation                                                       
                               (square                                                        Local Relief                                                                                                                                                  Moisture Regimes    Mean annual       Mean annual      January min/max;
                               miles)                                                             (feet)                                                                                                                                                                          (inches)            (days)      July min/max, ( F)                                                                                      

4e.  High Southern              916 High, undulating plateau punctuated by                    4000-8208 Pleistocene alpine glacial deposits; Pliocene  Andisols (Vitricryands),                              Woodcock, Oatman, Otwin, Lapine,                    Cryic/            45-70           70-100              23/37;           Mountain hemlock, lodgepole pine,              Mostly coniferous forest with some bare rock at
                                           volcanic peaks and affected by alpine                    /          and Miocene andesite and olivine basalt.             Mollisols (Cryoborolls),                 Winopee, Steiger. Very deep to deep,                 Udic                                                 44/74            Pacific silver fir; some grand fir, white  higher elevations. Land uses include back-
      Cascades Montane                     glaciation. Many glacial rock-basin lakes          700-2500                                                              Inceptisols (Cryochrepts),               very gravelly and stony loam to                                                                                            fir, Shasta red fir.                           country recreation and some forestry and
      Forest                               occur. Its intermittent and permanent streams                                                                            Spodosols (Haplocryods)                  gravelly loamy coarse sand.                                                                                                                                               grazing.                           
                                           have medium to high gradients.