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Shaded relief map of the Llano Estacado. 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.
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 west. [3]
Northwest escarpment of the Llano Estacado overlooking Alamogordo Valley of Quay and Guadalupe Counties, New Mexico.. The Caprock Escarpment is a term used in West Texas and Eastern New Mexico to describe the geographical transition point between the level High Plains of the Llano Estacado and the surrounding rolling terrain.
Bickford, M. E.; Soegaard, Kristian; Nielsen, Kent C.; McLelland, Jonathan M. (2000-07-01). "Geology and geochronology of Grenville-age rocks in the Van Horn and Franklin Mountains area, west Texas: Implications for the tectonic evolution of Laurentia during the Grenville". GSA Bulletin. 112 (7): 1134–1148.
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The term is considered synonymous with Far West Texas, a subdivision of West Texas. [2] The Trans-Pecos is part of the Chihuahuan Desert, the largest desert in North America. It is the most mountainous and arid portion of the state, and most of its vast area (outside the city of El Paso) is sparsely populated. Among the nine counties in the ...
West Texas is often subdivided according to distinct physiographic features. The portion of West Texas that lies west of the Pecos River is often called "Far West Texas" or the "Trans-Pecos", a term introduced in 1887 by geologist Robert T. Hill. [4] The Trans-Pecos lies within the Chihuahuan Desert and is the aridest part of the state.
In the Permian geologic period, North-Central Texas was a part of the western coastal zone of equatorial Pangea, a super-continental land mass. [1] Nearby uplifts and mountainous regions, such as the Muenster Arch and Red River Uplift, the Wichita, Arbuckle, and Ouachita mountains developed by the end of the Pennsylvanian, [2] providing elevated topography to the north and east during the Permian.