Catahoula Formation of the Texas Coastal Plain:Depositional Systems, Composition, Structural Development, Ground-Water Flow History, and Uranium Distribution

摘要

The Catahoula Formation of the Texas Gulf Coastal Plain consists of two oppositional systems-the Gueydan bedload fluvial system of the Rio Grande embayment and the Chita-Corrigan mixed load fluvial system of the Houston embayment. Both systems contain distinctive fluvial channel-fill, crevasse splay, floodplain, and lacustrine facies, which tend to persist vertically through the section. The paleoclimate varied from subarid in the Gueydan system to humid in northeastern parts of the Chita-Corngan system. Gueydan sands are dominated by plagioclase feldspar and volcanic rock fragments reflecting a western source;in contrast.