Geology illustrated on this map and accompanying geologic map database was revised using field, aerial-photograph, and LiDAR interpretations following a review of previous work on the area’s geology.
This field trip is a follow-up and complement to the publication of the Hydrogeologic Atlas of the Hill Country Trinity Aquifer, Blanco, Hays, and Travis Counties, Central Texas (referenced as Wierman et al., 2010 or “HA” throughout this guidebook).