It is firm or very firm and brittle and is very strongly to slightly acid. Bleached sand grains coat prism faces in the upper part. Texture is very fine sandy loam or silt loam. The C horizons are similar or lighter in color than the Bx horizons. The C horizons are strongly acid to neutral, and pH typically increases with depth.
Texture ranges from sand to loamy fine sand in the fine-earth fraction.
These are the Canaseraga and Williamson series in the same family and the Allard , Hartland , Salmon , and Unadilla series in related families. Canaseraga soils have 10 percent or more coarse fragments in the fragipan. Williamson soils have common distinct or prominent mottles within a depth of 24 inches. Allard, Hartland, Salmon and Unadilla soils lack a fragipan. Amboy soils are nearly level to sloping soils where contrasting permeable material underlies a silty deposit and sloping to steep soils where the silty deposits are thick.