The Oquaga series consists of moderately deep, somewhat excessively drained soils formed in a thin mantle of till over sandstone, siltstone, and shale bedrock on nearly level to very steep uplands. Slope ranges from 0 to 70 percent.
Permeability is moderate.
Mean annual air temperature is 49 degrees F. and mean annual precipitation is 42 inches. Oquaga very channery silt loam, forested. Depth to bedrock ranges from 20 to 40 inches. Content of rock fragments ranges from 15 to 60 percent in surface horizons and from 25 to 85 percent in individual layers in the remainder of the soil. Unless limed, reaction ranges from extremely acid to moderately acid throughout the soil.