Search results
Results from the WOW.Com Content Network
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]
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.
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.
The Llano has no natural southern boundary, instead blending into the Edwards Plateau near Big Spring, Texas. This geographic area stretches about 250 miles (400 km) north to south, and 150 miles (240 km) east to west, [7] a total area of some 32,000 square miles (83,000 km 2), [2] larger than Indiana and 12 other states.
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.
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.
Llano Uplift - geologic map. The Llano Uplift can be considered an uplift by either its pattern on a geological or structural map of the top of the Precambrian rocks. It qualifies as an uplift because it consists of an extensive Precambrian basement high that is exposed by virtue of its surface lying significantly above in elevation the surface of surrounding Precambrian basement.
The region is along the edge of the Edwards Plateau. Elevations range from 2,300 feet (700 m) along the Pecos River to over 2,800 feet (850 m) on the highest mesas. Elevations range from 2,300 feet (700 m) along the Pecos River to over 2,800 feet (850 m) on the highest mesas.