Download or read book Canyon Dam Spillway Gorge and Natural Bridge Caverns written by C. M. Woodruff and published by . This book was released on 2017 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Central Texas Hill Country--a region noted for the beauty of its landscapes and its rich cultural heritage--is one of the top tourist destinations in the state. Here, spring-fed streams cut limestone strata and reveal a wealth of natural treasures: perennial watercourses sustaining towering bald cypress trees below limestone bluffs, tributaries draining side canyons with hidden grottoes, and upland oak-juniper savannahs with caverns containing underground wonders. Although such destinations occur close to cities and towns adjacent to the Hill Country, notable geologic, biological, or cultural features of this region are often not recognized by those who live nearby or come to visit.This guidebook focuses on two spectacular geologic sites, Canyon Dam Spillway Gorge and Natural Bridge Caverns, both of which occupy the Balcones Fault Zone in Comal County between Austin and San Antonio (fig. 1). These sites provide contrasting views of the limestone terrains west of the Balcones Escarpment, the break in the land that cuts through Central Texas and marks the eastern edge of the Hill Country. Even though the two sites occupy roughly the same sequences of bedrock strata, all of Cretaceous age (table 1). The different processes that acted on these strata produced dramatically different landforms over disparate intervals of time. These contrasting hydrologic processes and time spans impart important geologic lessons about how landscapes evolve.