It is gravelly medial sandy loam, very gravelly medial sandy loam, gravelly medial loam or very gravelly medial loam. It is 20 to 45 percent coarse fragments. It is cemented glacial till that crushes to extremely gravelly loamy sand or very gravelly sand and is 50 to 80 percent coarse fragments. These are the Arta , Astoria , Boistfort , Bunker , Copalis , Elochoman , Ilwaco , Kinney , Knappton , Lebam , Lytell , Makah , Mopang , Narel , Newskah , Oyhut , Palix , Papac , Silcox , Skamo , Vesta , Walville , Willapa , Zenker and Zyzyl series. Arta soils lack hard rock fragments and have mottles in the lower part of the control section.
Astoria soils are silty clay or clay and lack hard rock fragments.
Boistfort soils have 35 percent or more clay and less than 15 percent hard rock fragments. Bunder soils have short-like concretions in the upper part of the control section and have 15 to 35 percent angular basalt fragments. Copalis and Papac soils have a paralithic contact within 40 inches. Elochoman soils lack hard rock fragments. Ilwaco soils have 4 to 7 percent organic carbon in the upper two-thirds of the control section and lack hard rock fragments.