The presence of linear extensibility of 6.0 cm or more at 12 to 38 inches. These are the Courtney and Olbut series in the same family. Courtney soils formed in alluvium from basic igneous rocks and contain coarse fragments. These are the Crete , Fillmore , Hastings , Holdrege , Scott and Wymore soils. Crete soils are not saturated and occur on a higher landscape position.
Fillmore soils are lower on the landscape.
Hastings and Holdrege soils have less clay in the subsoil and are better drained. They are higher on the landscape. Scott soils are saturated in the soil moisture control section for longer periods during the growing season and are lower on the landscape. Wymore soils are dry in the soil moisture control section for longer periods and are higher on the landscape. These soils are saturated at a depth of 6 inches to a depth of about 2 feet by a perched water table during part of the growing season in most years.