Mean annual temperature is 53 degrees F and mean annual precipitation is 23 inches at the type location. Gibbon silty clay loam - with a slope of less than 1 percent, in a cultivated field. The mollic epipedon ranges from 10 to 20 inches in thickness. Depth to carbonates is less than 10 inches and typically has calcium carbonate equivalent of 5 to 15 percent in most of the series control section. It is typically silt loam or silty clay loam but includes very fine sandy loam, loam, and clay loam.
Reaction is slightly alkaline or moderately alkaline.
Some pedons have thin strata of very fine sandy loam, fine sandy loam, or loamy fine sand. Carbonate concretions are in the AC and C horizons in some pedons. Below a depth of 40 inches the Cg horizon is stratified loamy fine sand, loamy sand, or fine sand in places. Reaction ranges from slightly alkaline through strongly alkaline. These are the Pahranagat and Paranat series in the same family.