The Clarno series consists of very deep, well drained or moderately well drained soils formed in glacial till on uplands.
Permeability is moderately slow.
Slopes range from 0 to 25 percent. Clarno loam - on a convex slope of 3 percent in a cultivated field. When described the soil was dry to a depth of 60 inches. Depth to calcium carbonates typically is 16 to 18 inches but ranges from 12 to 26 inches. Thickness of the mollic epipedon ranges from 8 to 20 inches and extends into the upper part of the Bw horizon in most pedons.