fine, smectitic, thermic Udic Haplustert
southcentral Texas
(Branyon series)

These soils form on nearly flat alluvial terraces. The alluvial parent material is both clay-rich and calcareous. The high shrink-swell capacity of this soil is apparent from the slickensides (ss) present throughout the lower profile. Slickensides are polished ped surfaces within the soil that form as a result of shrink-swell processes causing sections of soil to slide past one another along fracture planes. The coefficient of linear extensibility (COLE) for this soil is typical of Vertisols. A COLE >0.09 indicates high shrink-swell activity. This soil is a member of the Branyon series.

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