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This list of the prehistoric life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas.
Based on a dataset of average population density of hunter-gatherer groups collected by Lewis R. Binford, which indicate a mean density of 0.1223 humans per km 2 and a median density of 0.0444 humans per km 2, the combined human population of Africa and Eurasia at the time of the LGM would have been between 2,998,820 and 8,260,262 people.
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.
The prehistoric bony fish of Texas are known largely from Cretaceous rocks. Fossils include mostly teeth, vertebrae, and scales, although sometimes well preserved skeletons are found in the Austin Chalk member. [6] During the Turonian Texas was home to the fish Pachyrhizodus leptopsis. [15] Early Cretaceous heart urchins and biscuit urchins.
1000–1750: Fort Ancient culture, a non-Mississippian culture emerges in modern-day southern Ohio, northern Kentucky, southeastern Indiana, and western West Virginia. 1000–1780: Plains Village period on Great Plains, from North Dakota to Texas [3] 1070: Great Serpent Mound built in Ohio. [13]
The population of Texas continued to grow rapidly throughout the 20th century, becoming the second-largest state in population in the United States by 1994. Also during the 20th century, the state continued to become economically highly diversified, with a growing economic base in emerging technologies in the 21st century.
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.
This article contains a list of fossil-bearing stratigraphic units in the state of Texas, U.S. Sites. Group or Formation Period Notes Admiral Formation: Permian: