In undisturbed areas, in most years, depth to an intermittent perched high water table is at a depth of 0.5 to 1.5 feet. In drained areas, depth to the water table is 0.5 to 2 feet. Most areas are being used to grow corn and soybeans. A few areas are used for growing small grain, mainly wheat, and for hay and pasture. Also a few areas are in woodland.
Native vegetation is mixed hardwood forest.
Mainly in MLRA 114. It is of large extent in southeastern Indiana, and of small extent in southwestern Ohio and north-central Kentucky. Switzerland County, Indiana, 1930. Avonburg soils have previously been considered to be formed in 20 to 48 inches of loess and the underlying loam or clay loam till. Recent investigations and decriptions show a paleosol formed in till begins between a depth of 60 and 90 inches.