Calcium carbonate content of the control section is 15 to 40 percent. The A horizon has hue of 10YR or 7.5YR, value of 5 or 6, and chroma of 2 to 4. Texture is silt loam, loam, clay loam, silty clay loam, or silty clay. Coarse fragments range from 0 to 5 percent gravel. The Bw horizon has hue of 10YR or 7.5YR, value of 5 to 7, and chroma of 2 to 4.
Texture is clay loam, silty clay loam or silty clay.
The Bk horizons have hue of 10YR to 5YR, value of 5 to 8, and chroma of 2 to 6. Texture is clay loam, silty clay loam, or silty clay. These are the Alama and Riveroad series in the same family. Similar soils are the Copita , Hoban , Midessa , Model, and Reagan series. Alama soils have less than 15 percent calcium carbonate in the control section.