Elevation ranges from near sea level to 1,700 feet. These soils formed in material weathered from siltstone or very fine grained sandstone. The climate is characterized by cool wet winters and relatively cool summers. The average annual precipitation ranges from 70 to 125 inches. These are the Astoria , Elochoman , and Zenker soils.
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.