The soil formed in alkaline, clayey sediments of the Beaumont Formation of Pleistocene age. F. Mean annual precipitation ranges from 33 to 45 inches. Frost-free days range from 280 to 300. The Thornthwaite P-E indices range from 48 to 64. These are the competing Laewest series, and the Dacosta , Livia , Narta and Palacios series.
Dacosta soils have an argillic horizon.
Livia, Narta and Palacios soils have loamy surface horizons and have a natric horizon. A perched water table occurs in the A and Bss horizons for periods of 1 to 5 weeks in winter and spring. Native grasses are mainly gulf cordgrass, and species of andropogon and paspalum. The series is of moderate extent. Soil Taxonomy, Second Edition, 1999.