The Oran series consists of very deep, somewhat poorly drained soils that formed in 14 to 24 inches of loamy sediments and underlying loamy glacial till.
Oran soils are on convex or slightly concave summits and weakly defined side slopes on uplands.
Slopes range from 0 to 5 percent. Oran loam, on a slightly convex upland ridge top of about 2 percent slope in a cultivated field. 43 degrees 11 minutes 43.78 seconds N. and long. 92 degrees 14 minutes 29.79 seconds W., NAD 83. Soils are cultivated.