These include the competing Tobosa series and also Ector , Kavett , Noelke , and Valera series. Tobosa soils are slightly higher in position on broad flats. Ector and Noelke soils are shallow to very shallow to bedrock and are in higher positions. Kavett soils are shallow to a petrocalcic and are in higher positions. Valera soils are moderately deep to limestone on higher positions.
Permeability is very slow.
Runoff is negligible. In about 1 year out of 10 ponding duration can be a month or more. Native vegetation is buffalograss, curly mesquitegrass, threeawn, buffalo bur, prickly pear, and mesquite trees. The series is of minor extent. The series was proposed and established for a special survey of the Texas Range Station in 1938.