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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]
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.
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 geology of Pakistan encompasses the varied landscapes that make up the land constituting modern-day Pakistan, which are a blend of its geological history, and its climate over the past few million years. The Geological Survey of Pakistan is the premier agency responsible for studying the country's geology. [1]
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.
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 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.
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.