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)                                                                                      

4f.  Umpqua Cascades 1594 Highly dissected mountains with a few small                         1000-5300 Tertiary pyroclastic rocks, basalt and                      Ultisols (Palehumults),                  Orford, Honeygrove, Gustin, Klickitat,             Mesic,             50-80           80-180              32/42;           Grand fir, white fir, western hemlock,  Douglas-fir/white fir/western hemlock/ Pacific
                                           lakes and high to medium gradient streams                /          basaltic andesite lava flows, breccia, tuff,         Inceptisols (Haplumbrepts)               Harrington, Kinney, Illahee,                       Frigid/                                                49/82            Pacific silver fir, Douglas-fir; some          silver fir/Shasta red fir/mountain hemlock
                                           and rivers.                                        1200-2800 sandstone, siltstone.                                                                                Scaredman, Mellowmoon. Very deep to                  Udic                                                                  Shasta red fir, mountain hemlock.              forests. Land uses include forestry and
                                                                                                                                                                                                             moderately deep, clay loam, gravelly                                                                                                                                      recreation. Ecoregion 4f is an important
                                                                                                                                                                                                             clay loam, gravelly silt loam, very                                                                                                                                       regional water source.             
                                                                                                                                                                                                             gravelly loam, extremely gravelly loam,                                                                                                                                                                      
                                                                                                                                                                                                             cobbly loam.