Report 181 by G. H. Shafer, U.S. Geological Survey | March 1974, (reprinted November 1986)

Report 181 - Ground-Water Resources of Duval County, Texas
Figure 4 - Geology
Figure 5 - Correlation of Geologic Units Along Line A-A'
Figure 6 - Correlation of Geologic Units Along Line B-B'
Figure 7 - Correlation of Geologic Units Along Line C-C'
Figure 8 - Approximate Altitude of the Top of the Catahoula Tuff
Figure 9 - Approximate Altitude of the Top of the Oakville Sandstone
Figure 10 - Approximate Altitude of the Base of the Goliad Sand
Figure 11 - Approximate Altitude of Water Levels in Wells in the Catahoula Tuff and Goliad Sand, 1969-70
Figure 16 - Depth or Screened Intervals of Wells and Chloride and Dissolved-Solids Content of Water From Wells
Figure 18 - Brine-Producing Areas
Figure 19 - Thickness of Sand Containing Fresh to Slightly Saline Water in the Catahoula Tuff
Figure 20 - Thickness of Sand Containing Fresh to Slightly Saline Water in the Oakville Sandstone
Figure 21 - Thickness of Sand Containing Fresh to Slightly Saline Water in the Goliad Sand
Figure 22 - Locations of Wells