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Fault or Balcones Fault Zone is an area of largely normal faulting [1] in the U.S. state of Texas that runs roughly from the southwest part of the state near Del Rio to the north-central region near Dallas [2] along Interstate 35. The Balcones Fault zone is made up of many smaller features, including normal faults, grabens, and horsts. [3]
The artesian zone intersects the saline zone to the south and west at the fresh water - saline water boundary (FW-SW). [ 6 ] The aquifer's recharge zone, [ 7 ] where surface water enters the aquifer, follows the Balcones Fault line, from Brackettville (roughly along U.S. Highway 90 ), through San Antonio , and north to Austin along but a few ...
5.35% [1] Protected. 2.26% [1] 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 dispersal of extra magma warmed the water in the ocean, and was a conducive environment for calcareous-shelled organisms, which after death sank to the bottom of the ocean floor creating thick deposits of limestone. In addition to the displacement of water, an increase in injected magma raised CO₂ levels to around 2-6 times the current ...
The Glen Rose Formation is a shallow marine to shoreline geological formation from the lower Cretaceous period exposed over a large area from South Central to North Central Texas. The formation is most widely known for the dinosaur footprints and trackways found in the Dinosaur Valley State Park near the town of Glen Rose, Texas, southwest of ...
The Salado Springs are located in the Balcones Fault zone, and they reach the surface through artesian pressure by way of faults in the Cretaceous Edwards limestone. The main recharge area for the springs is probably several miles to the southwest in Williamson County, where several faults intersect with Salado Creek.
October 26, 2024 at 6:44 AM. PALISADES, N.Y. — The discovery of a new fault line may explain the unusually strong and displaced shaking from April’s magnitude 4.8 quake that struck the heart ...
The Llano Uplift is a geologically ancient, low geologic dome that is about 90 miles (140 km) in diameter and located mostly in Llano, Mason, San Saba, Gillespie, and Blanco counties, Texas. It consists of an island-like exposure of Precambrian igneous and metamorphic rocks surrounded by outcrops of Paleozoic and Cretaceous sedimentary strata.