Astoria soils are clayey. Elochoman soils have less than 35 percent weathered rock fragments in the particle-size control section. Zenker soils are 20 to 27 percent apparent clay in the particle-size control section. Douglas-fir and western hemlock are the main tree species with some red alder, western redcedar, and Sitka spruce. The understory is salmonberry, western swordfern, red huckleberry, salal, vine maple, Oregon oxalis, and western brackenfern.
Series is of small extent.
Diagnostic horizons and features recognized in this pedon are an umbric epipedon from the mineral surface to 17 inches and a cambic horizon from 17 to 50 inches. This description reflects a change in classification based on amendment 16. A benchmark soil study by Washington State University is also available. The WSU study has bulk density data and supports the change in classification.