Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...
pluton rock formation
Rock formations in the United States
The following is a partial list of rock formations in the United States, by state:-Arizona:*Canyon de Chelly National Monument**Spider Rock*Chiricahua National Monument**Duck on a Rock**Organ Pipe**Mushroom Rock**Sea Captain*Monument Valley...
located in the Llano Uplift
The Llano Uplift is a roughly circular geologic dome of Precambrian rock, primarily granite, in Central Texas in the United States. It is located in the eastern region of the Edwards Plateau, west of the Texas Hill Country...
approximately 15 miles (24 km) north of Fredericksburg
Fredericksburg is the seat of Gillespie County, in the U.S. state of Texas. As of the 2010 Census estimate, the city had a population of 10, 530...
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...
, USA and 15 miles (24 km) south of Llano, Texas
-History:Llano County was established in compliance with a February 1, 1856, state legislative act. The Llano River location was chosen in an election held on June 14, 1856, under a live oak on the south bank of the river, near the present site of Roy Inks Bridge in Llano...
. Enchanted Rock State Natural Area, which includes Enchanted Rock and surrounding land, spans the border between Gillespie County
Gillespie County, Texas
Gillespie County is a county located on the Edwards Plateau in the U.S. state of Texas. In 2010, its population was 24,837. It is located in the heart of the Texas Hill Country. Gillespie is named for Robert Addison Gillespie, who came to Texas in 1837. He was a Texas Ranger, an Indian fighter, a...
and Llano County
Llano County, Texas
Llano County is a county located on the Edwards Plateau in the U.S. state of Texas. In 2010, its population was 19, 301. Its county seat is Llano, and the county is named for the Llano River....
, south of the Llano River
The Llano River is a tributary of the Colorado River, approximately 105 mi long, in central Texas in the United States. It drains part of the Edwards Plateau in Texas Hill Country northwest of Austin....
. Enchanted Rock covers approximately 640 acres (259 ha) and rises approximately 425 feet (129.5 m) above the surrounding terrain to elevation of 1825 feet (556.3 m) above sea level.