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The terrestrial flora of Late Cretaceous Texas left behind plant fossils in northern Texas. [6] During the early Cenozoic, Texas was the site of significant volcanic eruptions. [4] Ostracods remained common in the Tertiary seas of Texas. Segments left by ophiuroids are also common in rocks deposited in these marine environments.
This article contains a list of fossil-bearing stratigraphic units in the state of Texas, U.S. Sites. Group or Formation Period ... Early Permian: Neylandville Marl:
†Aulopora – report made of unidentified related form or using admittedly obsolete nomenclature; Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten †Aviculopecten †Aviculopecten ballingerana †Aviculopecten girtyi – type locality for species †Aviculopecten gryphus – type locality for species
The oldest fossils in the DFW metroplex can be collected at Mineral Wells Fossil Park NW of Fort Worth. These fossils include well preserved Pennsylvanian marine fossils such as crinoids and brachiopods, which have been dated to 300 million years old. [4] [5] Remnants of dinosaurs and Late Cretaceous marine reptiles such as Mosasaur are found.
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 Archer City Formation is a geological formation in north-central Texas, preserving fossils from the Asselian and early Sakmarian stages of the Permian period.It is the earliest component of the Texas red beds, introducing a tropical ecosystem which will persist in the area through the rest of the Early Permian.
This list of the Paleozoic life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas and are between 538.8 and 252.17 million years of age.
Masses of metavolcanic rock are also found within the formation, including metamorphosed basalts and tuffs that were once lava flows and volcanic ash beds. The formation is exposed only in a folded belt near Van Horn, Texas , where tectonic process tilted the beds nearly vertical.