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The Permian (/ ˈ p ɜːr m i. ə n / PUR-mee-ən) [4] is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period 298.9 million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya.
The Permian began with the Carboniferous flora still flourishing. About the middle of the Permian there was a major transition in vegetation. The swamp-loving lycopod trees of the Carboniferous, such as Lepidodendron and Sigillaria, were replaced by the more advanced conifers, which were better adapted to the changing climatic conditions.
c. 850 Ma - Start of the Neoproterozoic oxygenation event, a second major increase in atmospheric and oceanic oxygen concentration on Earth. [ 23 ] c. 830 Ma – Rift develops on Rodinia between continental masses of Australia, eastern Antarctica, India, Congo and Kalahari on one side and Laurentia, Baltica, Amazonia, West African and Rio de la ...
Seymouria was a twenty inch long transitional form documenting the origin of reptiles from their amphibian-like forebears from Texas. [40] Reptiles were becoming common during the Permian. [41] Texas was also home to the pelycosaurs Dimetrodon and Edaphosaurus. [40] Late in the Permian therapsids became the dominant large-bodied terrestrial ...
The era began with the Permian–Triassic extinction event, the most severe extinction event in the fossil record; 95% of the species on Earth died out. [149] It ended with the Cretaceous–Paleogene extinction event that wiped out the dinosaurs .
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Nov. 24—Starting with a model of the Texas economy when he was a young professor at Baylor University, economist Ray Perryman of Odessa built a global system that lets him analyze thousands of ...
The Permian Basin comprises several component basins, including the Midland Basin, which is the largest; Delaware Basin, the second largest; and Marfa Basin, the smallest. The Permian Basin covers more than 86,000 square miles (220,000 km 2), [1] and extends across an area approximately 250 miles (400 km) wide and 300 miles (480 km) long. [2]