The Palangana salt dome lies 60 miles west of Corpus Christi, Texas. Its stratigraphy and structural features have been determined for the most part from a drilling program conducted to determine the extent of potassium-bearing beds within the dome; 25 test wells were drilled.

The salt plug is composed of white and gray halite; anhydrite is unevenly distributed within the salt mass. Four stratigraphic units are recognized: (1) the San Diego group, (2) the Palangana group, (3) the Benavides group, and (4) the Anhydritic group. This sequence was established from well data, but the relative ages of the units could...