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Geology. Age of rock. late– Cretaceous Period. Volcanic arc / belt. Ouachita. Last eruption. 79–83 million years ago [1] Pilot Knob is the eroded core of an extinct volcano located in Austin, Texas, United States. It is near Austin–Bergstrom International Airport and McKinney Falls State Park.
Name Elevation Location Last eruption meters feet Coordinates; Malumalu: Last 8,000 years Ta‘u-931: 3054: 30,000 years ago [15]: Ofu-Olosega: 639: 2096: 1866 unnamed submarine cone eruption
Geology of Texas. Texas contains a wide variety of geologic settings. The state's stratigraphy has been largely influenced by marine transgressive-regressive cycles during the Phanerozoic, with a lesser but still significant contribution from late Cenozoic tectonic activity, as well as the remnants of a Paleozoic mountain range.
268,581 sq mi (695,620 km 2) Coastline. 367 mi (591 km) Highest point. Guadalupe Peak, 8,749 feet (2,667 m) Lowest point. Gulf of Mexico, sea level. The geography of Texas is diverse and large. Occupying about 7% of the total water and land area of the U.S., [1] it is the second largest state after Alaska, and is the southernmost part of the ...
Coordinates: 29.9532°N 104.4776°W. The Chinati Mountains Caldera Complex is a caldera complex located primarily in the Chinati Mountains within the Trans-Pecos Volcanic Field in Texas, United States. [ 1] It is the largest and most documented volcano within the Trans-Pecos Volcanic Field, consisting mostly of two calderas: the Infernito ...
Kilbourne Hole is a maar volcanic crater, located 30 miles (48 km) west of the Franklin Mountains of El Paso, Texas, in the Potrillo volcanic field of Doña Ana County, New Mexico. Another maar, Hunt's Hole, lies just two miles (3.2 km) south. Kilbourne Hole is notable for the large number of mantle xenoliths (solid fragments of mantle rock ...
T. Trans-Pecos Volcanic Field. Categories: Landforms of Texas. Volcanoes of the United States by state. Igneous petrology of Texas.
Type of rock. Sedimentary, Igneous. The Franklin Mountains of Texas (Spanish: Sierras de los Mansos[1]) are a small range 23 miles (37 km) long, 3 miles (5 km) wide that extend from El Paso, Texas, north into New Mexico. [2] The Franklins were formed due to crustal extension related to the Cenozoic Rio Grande rift.