Dekapen, Elliottsville, Michigamme, Onota, Penquis, Rawsonville, Revel and Tunbridge soils are all moderately deep to bedrock. Groveton soils have less than 40 percent silt in the particle-size control section. Houghtonville soils have spodic horizons that are greater than 16 inches thick. Potsdam soils have an aeolian or water deposited mantle. Welcome soils have sandstone bedrock within 60 inches.
Bangor soils are on till plains and ridges.
Slope ranges from 0 to 25 percent. The soils formed in glacial till derived mainly from slate, shale and phyllite with small amounts of granite, fine grained quartzite, and sandstone. The mean annual air temperature ranges from 41 to 46 degrees F, and the mean annual precipitation ranges from 34 to 46 inches. The frost-free season ranges from 100 to 150 days. Elevation ranges from 10 to 1000 feet above mean sea level.