Table 1. Summary of the lithologic and hydrologic properties of the hydrogeologic units in Webb County, Texas
[Lithologic and hydrologic properties modified from Lonsdale and Day, 1937; Winslow and Kister, 1956; Klemt and others, 1976; University of Texas, Bureau of Economic Geology, 1976a,b. Color shading to show aquifer. ft, feet; AQ, aquifer; <, less than; gal/min, gallons per minute; CU, confining unit; >, greater than]