Reaction ranges from very strongly acid to moderately acid in the solum and slightly acid to neutral in the substratum. Mean annual soil temperature ranges from 33 to 37 degrees F. The E, and Eb horizon if present, have moist value of 4 or 5 and moist chroma from 1 through 3. The Bs, and Bsb horizon if present, have moist hue from 2.5YR to 7.5YR, moist value from 2 through 5 and moist chroma from 4 through 6. Texture is silt loam or very fine sandy loam. The BC horizon has moist hue of 7.5YR or 10YR, moist value from 3 through 5 and moist chroma from 3 through 6.
Texture is silt loam or very fine sandy loam.
The 2BC horizon, when present, has moist hue of 7.5YR or 10YR, moist value from 3 through 5 and moist chroma from 3 through 6. Texture is loam or sandy loam. The 2C horizons have moist hue from 10YR through 2.5Y, moist value from 3 through 5 and moist chroma from 2 through 4. Texture is sandy loam or loam. Almac and Chiwaukum soils have a xeric moisture regime and MAST greater than 37 degrees F. Foss soils have a MAST greater than 37 degrees F. Pinkham soils are very stony in the upper part of the particle-size control section.