D.L. Slagle Fred R. Snyder Ann F. Ardis 1985 <p>This report, prepared in cooperation with the City of Austin, delineates the outcrop of the Edwards aquifer that is hydrologically associated with Barton Springs. &nbsp;The Edwards is a regional aquifer system in central Texas that extends in a narrow belt from Kinney County to Bell County (index map) and lies within an area locally known as the Balcones fault zone. &nbsp;Hydrologic boundaries separate the Edwards auifer into several parts. &nbsp;Barton Springs is the major discharge point of the part of the Edwards aquifer in the Austin area (southern Travis and northern Hays Counties).</p> application/pdf 10.3133/ofr85643 en U.S. Geological Survey Delineation of the outcrop of the Edwards Aquifer hydrologically associated with Barton Springs in the Austin area, Texas reports