Mustang soils occur on similar surfaces. Narta and Papalote soils have more than 35 percent clay in their control section. Orelia and Papalote soils have less than 15 percent exchangeable sodium in the Bt horizons. Victoria soils have intersecting slickensides and gilgai microrelief. Most areas are used as native rangeland.
Native grasses are mainly gulf cordgrass, seahorse saltgrass, knotroot bristlegrass, and panicum.
Woody invaders are mainly low mesquite, dwarf liveoak trees, and pricklypear. A few areas are used as improved pastures of coastal bermudagrass. The series is of minor extent. These soils were formerly included with the Matagorda and Willamar series. Albic horizon - the zone from the surface of the soil to a depth of approximately 12 inches.