The Bt horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 4. Texture is fine sandy loam, sandy loam, coarse sandy loam, loam or their channery or gravelly analogues. Structure is weak, fine to coarse, subangular blocky or platy. Reaction is strongly acid to neutral. The 2BC horizon has hue of 7.5YR to 2.5Y, value of 4 or 5, and chroma of 2 to 4.
Texture is clay loam, silty clay loam, loam, silt loam or their channery analogues.
Reaction is slightly acid to slightly alkaline. The 2C horizon has hue of 10YR to 5Y or is neutral, value of 4 or 5, and chroma of 0 to 4. Texture is clay loam, silty clay loam, loam, silt loam or their channery analogues. Reaction is neutral to moderately alkaline. There are no other series in the same family as Harbor.