Sesquijuventic - Monosiallitic soil material (<2mm fine earth fraction) with moderate to high content of Fe and Al oxyhydroxides, usually > 7% and have more than 10% weatherable minerals in the coarse fraction (>20um).

Sesquimonorthic - Monosiallitic soil material (<2mm fine earth fraction) with moderate to high content of Fe and Al oxyhydroxides, usually > 7% and/or accumulations of more than 5% iron-rich and/or iron cemented bodies such as plinthite. Sesquimonorthic soil materials have less than 10% weatherable minerals in the coarse fraction (>20um).