These nearly level to strongly rolling soils occur on uplands. They formed in gravelly colluvium from predominantly igneous sources. Slopes range from 0 to 16 percent. Boracho very gravelly loam - rangeland. Depth to igneous bedrock or other consolidated material is more than 40 inches.
Reaction ranges from slightly to moderately alkaline.
Calcium carbonate equivalent above the petrocalcic horizon ranges from 2 to 20 percent by weight. The A and Bk horizons have hue of 7.5YR or 10YR, value of 4 or 5, and chroma of 2 or 3. Texture of the fine earth fraction is fine sandy loam, loam or clay loam. Clay content ranges from 10 to 35 percent above the petrocalcic horizon and 2 to 10 percent below. Coarse fragments of caliche or igneous material typically range from about 35 to 65 percent.