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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 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.
Edwards Group stratigraphic column in Texas. The Edwards Group is a geologic group in Texas.It preserves fossils dating back to the Cretaceous period.. A stratigraphic column at the Mount Bonnell Fault location starts with the Lower Cretaceous Trinity Group overlain by the Edwards Group.
The Wilcox Group is an important geologic group in the Gulf of Mexico Basin and surrounding onshore areas from Mexico and Texas to Louisiana and Alabama. The group ranges in age from Paleocene to Eocene and is in Texas subdivided into the Calvert Bluff , Simsboro and Hooper Formations , [ 1 ] and in Alabama into the Nanafalia and Hatchetigbee ...
The Goliad Formation (Tg) [1] is a geologic formation in Texas.It preserves fossils dating back to the Serravallian to earliest Pliocene stages (Clarendonian, Hemphillian and earliest Blancan in the NALMA classification) of the Neogene period, [2] including the gomphothere Blancotherium among many other fossil mammals, reptiles, birds and fish.
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 ...
Tools. move to sidebar ... This article contains a list of fossil-bearing stratigraphic units in the state of Texas, U.S. Sites ... "U.S. Geologic Names ...