Lombard soils are formed in saprolite. Michigamme soils have less than 10 percent clay in the lower portion of the profile. Onota soils have redder hues in the lower B horizon. Penquis soils have crushable rock fragments throughout. Rawsonville and Tunbridge soils have less than 10 percent clay in the particle-size control section.
Elliottsville soils are on till plains, hills, ridges and mountains.
Slope is dominantly 8 to 15 percent but ranges from 3 to 65 percent. The soils formed in a moderately deep mantle of glacial till derived mainly from slate, metasandstone, phyllite or schist. The climate is humid and cool temperate. The mean annual temperature ranges from 38 to 44 degrees F, and mean annual precipitation ranges from 34 to 46 inches. The frost-free season ranges from 80 to 130 days.