Bulletin 6520 by H.B. Harris, Geologist, U.S. Geological Survey | August 1965

Bulletin 6520 - Ground-Water Resources of LaSalle and McMullen Counties, Texas (pdf - 7.93MB)
Plates
Figure 4 (pdf - 5.15MB) - Map Showing the Approximate Altitude of the Top of the Carrizo Sand in LaSalle and McMullen Counties
Figure 5 (pdf - 4.84MB) - Map Showing the Approximate Altitude of the Top of the Queen City Sand Member of the Mount Selman Formation, LaSalle and McMullen Counties
Figure 6 (pdf - 4.78MB) - Map Showing the Approximate Altitude of the Top of the Sparta Sand in La Salle County
Figure 12 (pdf - 6.57MB) - Map Showing the Approximate Depth to the Top of the Carrizo Sand, La Salle and McMullen Counties
Figure 13 (pdf - 4.79MB) - Map Showing the Approximate Thickness of Sands Containing Fresh to Slightly Saline Water in the Carrizo Sand in La Salle and McMullen Counties
Figure 14 (pdf - 4.82MB) - Map Showing the Approximate Depth to the Top of the Queen City Sand Member of the Mount Selman Formation, La Salle and McMullen Counties
Figure 15 (pdf - 4.88MB) - Map Showing the Approximate Thickness of Sands Containing Fresh to Slightly Saline Water in the Queen City Sand Member of the Mount Selman Formation in LaSalle and McMullen Counties
Figure 16 (pdf - 4.78MB) - Map Showing the Approximate Depth to the Top of the Sparta Sand, La Salle County