Geohydrologic significance of lithofacies of the Cockfield Formation of Louisiana and Mississippi and of the Yegua Formation of Texas

Abstract

PLATE 1. Section A-A'-A" showing correlation of the Cockfield and Yegua Formations and associated formations in southwestern Louisiana and Texas. 2-7. Maps showing: 2. Structure contours on the top of the Cockfield and Yegua Formations in Louisiana, Mississippi, and Texas. 3. Sand-percentage distribution and thickness of the Cockfield and Yegua Formations in Loui&iana, Mississippi, and Texas. 4. The maximum sand-unit thickness in the Cockfield and Yegua Formations in Louisiana, Mississippi, and Texas. 5. Estimated coefficients of transmibsibility of the total sand thickness of the Cockfield Formation in Louisiana and Mississippi. 6. The piezometric surface and the altitude of the base of fresh ground water in the Cockfield Formation in Louisiana and Mississippi. 7.