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Oklahoma was a terrestrial environment for most of the ensuing Mesozoic era. [3] The Late Triassic Dockum Group of western Oklahoma preserved remains of archosaurs and temnospondyls, although its fossil record is restricted to a narrow region of the panhandle and is far sparser than the equivalent records in Texas, New Mexico, and Arizona. [98]
The genus was one of the first Mesozoic marine reptiles known to science—the first fossils of Mosasaurus were found as skulls in a chalk quarry near the Dutch city of Maastricht in the late 18th century, and were initially thought to be crocodiles or whales. One skull discovered around 1780 was famously nicknamed the "great animal of Maastricht".
The Lewis and Clark Expedition may have discovered the first Mosasaurus fossil in North America. The first possible recorded discovery of a mosasaur in North America was of a partial skeleton described as "a fish" in 1804 by Meriwether Lewis and William Clark's Corps of Discovery during their 1804–1806 expedition across the western United States.
Fossils may be found either associated with a geological formation or at a single geographic site. Geological formations consist of rock that was deposited during a specific period of time. They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed.
This article contains a list of fossil-bearing stratigraphic units in the state of Oklahoma, U.S. Sites. Group or Formation
Paleontologists recently described the previously unknown mosasaur from fossils found near the North Dakota town of Walhalla. ... It includes a near-complete skull with a bony ridge over the eyes ...
The McLemore Site, designated by the Smithsonian trinomial 34WA5, is a prehistoric archaeological site of the Southern Plains villagers located near Colony in Washita County, Oklahoma. It is the site of a prehistoric Plains Indian village, dating from AD 1330-1360, during the Washita River phase. [ 1 ]
The Domebo site (also referred to as Domebo Canyon) is located in the west-central region of Oklahoma known as Caddo County. Caddo County has more than 451 archaeological sites. One hundred and fifteen of those sites date to the Plains Village era (A.D. 1000 to 1500). [3] In contrast, the Domebo site dates to approximately 11,000 years ago.