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The Edwards Plateau is a region of west-central Texas
Texas

Texas is a U.S. state located in the South Central United States, nicknamed the Lone Star State. Texas is the second largest U.S. state in both area and population, spanning , and with a growing population of 24.3 million residents....
 which is bounded by the Balcones Fault
Balcones Fault

The Balcones Fault Zone is a tensional structural system in Texas that runs approximately from the southwest part of the state near Del Rio, Texas to the north central region near Waco, Texas along Interstate 35....
 to the south and east, the Llano Uplift
Llano Uplift

The Llano Uplift is a roughly circular Dome of Precambrian rock, primarily granite, in Central Texas Texas in the United States. It is located in the eastern region of the Edwards Plateau, west of the Texas Hill Country....
 and the Great Plains region to the north, and the Pecos River
Pecos River

The Pecos River or Rio Pecos, as it is sometimes known in New Mexico, arises near Pecos, New Mexico, United States, and flows for through the eastern portion of that state and neighboring Texas before it empties into the Rio Grande near Del Rio, Texas....
 and Chihuahuan Desert to the west. San Angelo, Austin, San Antonio and Del Rio roughly outline the area.

The bedrock consists primarily of limestone
Limestone

File:Limestone Formation In Waitomo.jpgLimestone is a sedimentary rock composed largely of the mineral calcite . The deposition of limestone strata is often a by-product and indicator of biological activity in the geology record....
, with elevations ranging between 100 ft. and 3000 ft. Caves and springs (in wet years) are numerous.






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The Edwards Plateau is a region of west-central Texas
Texas

Texas is a U.S. state located in the South Central United States, nicknamed the Lone Star State. Texas is the second largest U.S. state in both area and population, spanning , and with a growing population of 24.3 million residents....
 which is bounded by the Balcones Fault
Balcones Fault

The Balcones Fault Zone is a tensional structural system in Texas that runs approximately from the southwest part of the state near Del Rio, Texas to the north central region near Waco, Texas along Interstate 35....
 to the south and east, the Llano Uplift
Llano Uplift

The Llano Uplift is a roughly circular Dome of Precambrian rock, primarily granite, in Central Texas Texas in the United States. It is located in the eastern region of the Edwards Plateau, west of the Texas Hill Country....
 and the Great Plains region to the north, and the Pecos River
Pecos River

The Pecos River or Rio Pecos, as it is sometimes known in New Mexico, arises near Pecos, New Mexico, United States, and flows for through the eastern portion of that state and neighboring Texas before it empties into the Rio Grande near Del Rio, Texas....
 and Chihuahuan Desert to the west. San Angelo, Austin, San Antonio and Del Rio roughly outline the area.

The bedrock consists primarily of limestone
Limestone

File:Limestone Formation In Waitomo.jpgLimestone is a sedimentary rock composed largely of the mineral calcite . The deposition of limestone strata is often a by-product and indicator of biological activity in the geology record....
, with elevations ranging between 100 ft. and 3000 ft. Caves and springs (in wet years) are numerous. The Plateau mostly lacks deep soil suitable for farming, though some cotton, grain sorghum and oats are grown. Thin soil and rough terrain areas are primarily grazing
Grazing

Grazing generally describes a type of predation in which a herbivore feeds on plants , or more broadly on a multicellular autotrophs . Grazing differs from true predation because the organism being eaten is not death, and it differs from parasitism as the two organisms do not symbiosis, nor is the grazer necessarily so limited in what it can...
 regions, with cattle, sheep and Angora goat
Angora goat

The Angora goat is a goat from the Angora region in Anatolia, near present-day Ankara, Turkey.This breed is first mentioned in the time of Moses, roughly 1500 BC The first Angora goats were brought to Europe by Charles V, Holy Roman Emperor, about 1554, but, like later imports, were not very successful....
s predominant. Several rivers cross the region, which generally flow to the south and east through the Texas Hill Country
Texas Hill Country

The Texas Hill Country is a region of Central Texas, United States, that features rolling, somewhat rugged, hills that consist primarily of limestone but includes the Llano Uplift and the second largest granite outcropping in the United States, Enchanted Rock, which is located some thirty miles northwest of Fredericksburg, Texas....
 toward the Gulf of Mexico
Gulf of Mexico

The Gulf of Mexico is the ninth largest body of water in the world. Considered a smaller part of the Atlantic Ocean, it is an oceanic basin largely surrounded by the North American continent and the island of Cuba....
; however, permanent surface water supplies are sparse throughout the area, except for man-made reservoirs. The area is well drained; rainwater flows into the Edwards Aquifer
Edwards Aquifer

The Edwards Aquifer is one of the most prolific artesian aquifer aquifers in the world. Located on the eastern edge of Edwards Plateau in the U.S....
 recharge zone at the south of the plateau to feed rivers to the south. Rainfall varies from 15 to 33 in. per year, on average, from northwest to southeast.

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