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The Western Interior Seaway, was a large inland sea that started to expand in the early Cretaceous period, though geological evidence suggests it started to expand in the late Jurassic period. It existed at its fullest extent from the mid-late Cretaceous period.
The map of North America with the Western Interior Seaway during the Campanian. The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that split the continent of North America into two landmasses for 34 million years.
This list may not reflect recent changes. A. ... Fish species in the Western Interior Seaway; G. ... List of fish named after animals; List of near threatened fishes; R.
This is a list of dinosaurs whose remains have been recovered from Appalachia. During the Late Cretaceous period, the Western Interior Seaway divided the continent of North America into two landmasses; one in the west named Laramidia and Appalachia in the east. Since they were separated from each other, the dinosaur faunas on each of them were ...
The Pierre Shale represents a period of marine deposition from the Western Interior Seaway, a shallow continental sea that submerged much of central North America during the Cretaceous. [100] At its largest, the Western Interior Seaway stretched from the Rockies east to the Appalachians, some 1,000 kilometers (620 mi) wide. At its deepest, it ...
A genus of avisaurid enantiornithine that is known from the humid low-lying swamps, lakes and river basins of the western shore of the Western Interior Seaway. †Balaur †Balaur bondoc; 70 Ma Sebes Formation, Alba County Romania An avialian from Romania †Brodavis †Brodavis americanus †Brodavis baileyi †Brodavis mongoliensis; 80.5-66 Ma
Deinosuchus was present on both sides of the Western Interior Seaway. [9] Specimens have been described from 12 U.S. states: Utah, Montana, Wyoming, New Mexico, New Jersey (Marshalltown Formation), Delaware, [35] Georgia, Alabama, Mississippi, Texas, and North & South Carolina (Tar Heel/Coachman & Bladen Formations [36]).
In 2013, Mikael Siverson and colleagues noted that during the Turonian or early Coniacian, Cretoxyrhina individuals living offshore were usually larger than those inhabiting the Western Interior Seaway, with some of the offshore C. mantelli fossils like one of the syntypes yielding total lengths of up to 8 meters (26 ft), possibly 9 meters (30 ft).