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The geology of west Texas is arguably the state's most complex, with a mix of exposed Cretaceous and Pennsylvanian strata, overlain by Quaternary conglomerates. A series of faults trend southeast to northwest across the region, from Big Bend to El Paso ; there are also extensive volcanic deposits.
Buda Limestone stratigraphic column in Texas. The Buda Limestone is a geological formation in the High Plains and Trans-Pecos regions of West Texas [1] and in southern New Mexico, [2] whose strata date back to the Late Cretaceous. Pterosaur remains are among the fossils that have been recovered from the formation. [3]
The unit was first identified in the subsurface at the Yates oil field of west Texas. [1] It was first traced to surface outcrops in the Carlsbad, New Mexico area in 1938 and assigned as a member of the (now abandoned) Whitehorse Formation. [3] Dickey raised the unit to formation rank in 1940, when the Whitehorse was raised to group rank. [4]
The Pennsylvanian Period also led to the development of other geologic formations, although none had the importance of the Morrow Formation. The Atoka Formation lies conformably on top of the Morrow Formation, and is characterized by its fossil-rich limestone inter-bedded with shale, reaching a max thickness of 660 feet (200 m).
The Castile Formation is a geologic formation in west Texas and southeastern New Mexico, United States. [1] It was deposited in the Ochoan Stage of the Permian period . [ 2 ]
Group or Formation Period Notes Admiral Formation: Permian: Aguja Formation: Cretaceous: Alacran Mountain Formation: Permian: Albany Group/Lueders Formation: Permian: Albany Group/Waggoner Ranch Formation
The Capitan Formation is a geologic formation found in western Texas and southeastern New Mexico. ... New Mexico and West Texas, to 1928" (PDF).
Eagle Ford stratigraphic column Outcrop of the Eagle Ford and Austin Chalk Contact off Kiest Blvd, 1/2 mile east of Patriot Pky in Dallas County. The Eagle Ford Group (also called the Eagle Ford Shale) is a sedimentary rock formation deposited during the Cenomanian and Turonian ages of the Late Cretaceous over much of the modern-day state of Texas.