Reaction ranges from slightly acid to strongly acid. It is loam, gravelly loam, gravelly sandy loam, or gravelly fine sandy loam. Reaction is slightly acid to strongly acid. It is gravelly fine sandy loam, gravelly sandy loam, very gravelly sandy loam, very cobbly sandy loam, or very flaggy sandy loam. Rock fragments average 20 to 45 percent hard fragments and 25 to 45 percent soft fragments.
Reaction is slightly acid or moderately acid.
There are no competing series. Almac soils are on mountain ridgetops and back slopes. They formed in volcanic ash over residuum and colluvium from schist, phyllite, and gneiss. Elevations are 3,200 to 6,000 feet. The soil is in a climate with warm, dry summers and cold, moist winters.