All textures are apparent field textures. Thickness of the solum and depth to the paralithic contact ranges from 40 to more than 60 inches. The 10 to 40 inch control section averages 20 to 27 percent clay. The mean annual soil temperature ranges from 47 to 51 degrees F. Soil reaction is strongly acid or extremely acid. The umbric epipedon is 11 to 19 inches thick.
Structure is subangular blocky or granular.
It is silt loam or loam and has 30 to 70 percent soft sandstone pebbles and cobbles. These are the Astoria , Boisefort, Bunker , Elochoman , Ilwaco , Kinney , Knappton , Lebam , LeBar, Lytell , Palix , Silcox , Swem , Sylvia , Vesta , Wahkiakum, Wellman , Willapa , and Zenker series. Astoria, Boistfort , Lebam, and Vesta soils have more than 35 percent clay in the control section. Bunker, Kinney, and Knappton soils average more than 15 percent hard rock fragments in the control section. Palix soils have 27 to 35 percent clay in the 10 to 40 inch control section.