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The Edwards Plateau is a geographic region forming the crossroads of Central, South and West Texas, United States.It is named in honor of Haden Edwards. [2] It is bounded by the Balcones Fault to the south and east; the Llano Uplift and the Llano Estacado to the north; and the Pecos River and Chihuahuan Desert to the west. [3]
Edwards and Trinity Aquifers map. The Edwards Aquifer is one of the most prolific artesian aquifers in the world. [2] Located on the eastern edge of the Edwards Plateau in the U.S. state of Texas, it is the source of drinking water for two million people, and is the primary water supply for agriculture and industry in the aquifer's region.
In his Roadside Geology of Texas, Geologist Darwin Spearing also prefers the geological solution to the etymology: The 'Staked Plains' tale is deeply entrenched in Texas mythology, but the real interpretation of Llano Estacado is sensible geologic: it means 'stockaded' or 'palisaded' plains - which is precisely how the edge of the plains appear ...
The highest hilltops, and the lower hills in the southern part of HCSNA, are capped by fairly resistant limestone of the Fort Terret formation within the Edwards Group, which is the dominant bedrock of the Edwards Plateau to the north. The rest of the preserve lies atop the softer, more easily eroded Upper Glen Rose Formation, also a limestone.
The Llano River (/ ˈ l æ n oʊ / LAN-oh) is a tributary of the Colorado River, about 105 miles (169 km) long, in Texas in the United States. [1] It drains part of the Edwards Plateau in Texas Hill Country northwest of Austin.
Inner Space Cavern lies within limestone and dolomite rocks of the Edwards Group formed during the Cretaceous period. [1] Following the formation of the Balcones Fault, a series of vertical fractures through the Edwards Formations allowed ground water to freely move through the limestone marking the beginning of the cavern's formation.
The Edwards Group is a geologic group in Texas. It preserves fossils dating back to the Cretaceous period . A stratigraphic column at the Mount Bonnell Fault location starts with the Lower Cretaceous Trinity Group overlain by the Edwards Group.
It drains an area of the Edwards Plateau, flowing west to east across the Texas Hill Country west of Austin. The name "Pedernales", first used in the middle 18th century, comes from a Spanish word for the flint rocks characteristic of the riverbed.