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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.
Llano Uplift - geologic map. The Llano Uplift can be considered an uplift by either its pattern on a geological or structural map of the top of the Precambrian rocks. It qualifies as an uplift because it consists of an extensive Precambrian basement high that is exposed by virtue of its surface lying significantly above in elevation the surface of surrounding Precambrian basement.
The Marathon Uplift is a Paleogene-age domal uplift, approximately 78 miles (126 km) in diameter, in southwest Texas.The Marathon Basin was created by erosion of Cretaceous and younger strata from the crest of the uplift.
Download as PDF; Printable version ... This article contains a list of fossil-bearing stratigraphic units in the state of Texas, U.S. Sites ... "U.S. Geologic Names ...
"Cathedral Mountain Formation" [Lexicon of Geologic Names of the United States for 1961-1967: Geological Survey Bulletin 1350] (PDF). United States Geological Survey. United States Government Printing Office. p. 129. doi:10.3133/b1350. "Permian Rock Units in the Glass Mountains, West Texas". National Geologic Map Database. United States ...
The Texas and Oklahoma red beds are sedimentary rocks, mostly consisting of sandstone and red mudstone. [8] The red color of the rocks is due to the presence of ferric oxide . [ 9 ] The rocks were deposited during the early Permian in a warm, moist climate, [ 10 ] with seasonal periods of dry conditions.
The Arroyo Formation, sometimes termed the Lower Clear Fork Formation, is a geologic formation in Texas. [1] It preserves fossils dating back to the Kungurian stage of the Permian period. [2] It is the lower-most portion of the Clear Fork Group, part of a series of fossiliferous Permian strata in the south-central United States known as the red ...
"Stratigraphic relations of the Austin, Taylor, and equivalent formations in Texas" (PDF). Geological Survey. 186 (G): 133–146. Archived (PDF) from the original on 18 June 2022. Burford, Selwyn Oliver (1928). "Characteristics of the Taylor Marl of Travis County, Texas". Archived from the original on 10 December 2021.