The Telos series consists of somewhat poorly drained soils on till plains, hills and ridges. They are shallow to dense basal till and very deep to bedrock. These soils formed in dense glacial till.
Permeability is moderate in the solum and slow or very slow in the dense substratum.
Slope ranges from 0 to 25 percent. Mean annual temperature is about 40 degrees F, and mean annual precipitation is about 38 inches at the type location. Telos silt loam, on a 4 percent north-facing slope in a very stony forested area, at an elevation of about 1640 feet elevation. 44 degrees 59 minutes 45 seconds N. and long. 70 degrees 42 minutes 05 seconds W., NAD 27.