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The Red Beds were first explored by American paleontologist Edward Drinker Cope starting in 1877. [2] Fossil remains of many Permian tetrapods (four-limbed vertebrates) have been found in the Red Beds, including those of Dimetrodon, Edaphosaurus, Seymouria, Platyhystrix, and Eryops. A recurring feature in many of these animals is the sail ...
A skeleton of Dimetrodon grandis found at the Craddock bonebed on display at the National Museum of Natural History. The "classic area" of the Arroyo Formation is one of the most fossiliferous parts of the Texas Red Beds, and it is typically differentiated from surrounding formations by paleontologists on the basis of faunal differences.
The shallow seas occupying this region began to retreat during the Permian. Coastal lowland environments formed in their place. However, the far western edge of Texas was still covered in sea water. A notable reef system formed there in the area now occupied by the Guadalupe Mountains. A great variety of marine invertebrates lived here. [4]
Primary red beds may be formed by the erosion and redeposition of red soils or older red beds, [3] but a fundamental problem with this hypothesis is the relative scarcity of red-colored source sediments of suitable age close to an area of red-bed sediments in Cheshire, England.
Hagerman Fossil Beds National Monument: Glenns Ferry Formation: Pliocene/Pleistocene: North America: US: Idaho: Hagerman horse ('American Zebra'), Camelops: Dinosaur Valley State Park [Note 2] Glen Rose Formation: Cretaceous (Aptian-Albian) North America: US: Texas: Dinosaur footprints Gray Fossil Site: Miocene: North America: US: Tennessee ...
The Nocona Formation is a geological formation in Texas, dating back to the Wolfcampian series (Early Permian). As part of the Texas red beds, it is one of several formations renowned for dense bonebeds of terrestrial vertebrate fossils. [1] [2] [3]
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Texas is approximately bisected by a series of faults that trend southwest to northeast across the state, from the area of Uvalde to Texarkana.South and east of these faults, the surface exposures consist mostly of Cenozoic sandstone and shale strata that grow progressively younger toward the coast, indicative of a regression that has continued from the late Mesozoic to the present.