They formed in loamy alluvial sediments washed largely from soils formed in residuum from granite, gneiss, schist, phyllite, and other metamorphic and crystalline rocks. Slopes are less than 2 percent. Near the type location the mean annual temperature is 56 degrees F., and the mean annual precipitation is 54 inches. Thickness of the solum ranges from 35 to 60 inches. Depth to stratified sand and gravel is 44 to more than 72 inches.
Reaction ranges from very strongly acid to slightly acid.
Flakes of mica range from few to many in all horizons. The A or Ap horizon has hue of 7.5YR or 10YR, value of 3 or 4, and chroma of 2 through 4. It is fine sandy loam, loam, sandy loam, or silt loam. Some pedons have an Ab horizon that has hue of 10YR, or it is neutral, value of 2 or 3, and chroma of 0 through 2. It has texture same as the A horizon.