Acana gravelly sandy loam, rangeland. The solum is 10 to 14 inches thick and depth to the duripan is 10 to 20 inches. In some pedons the solum rest directly on the indurated part of the duripan. Mixed but has a strong influence from vitric pyroclastic materials.
Soils are calcareous and are strongly or violently effervescent.
Weakly expressed, granular horizon occurs in some pedons. Sandy clay loam, clay loam or loam. Weak or moderate, fine to coarse, prismatic or subangular blocky structure. The remainder of the duripan is either strongly or weakly cemented, or stratified mixtures of the two and is hard to extremely hard and firm or very firm. These are the Ayres, Deerlodge, Madras, Minu, Ochoco, Selah and Wellington soils.