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The Prairie Bluff Chalk is a geologic formation in Alabama and Mississippi.It preserves fossils dating back to the Cretaceous period. [2] [3]The chalk was formed by marine sediments deposited along the eastern edge of the Mississippi embayment during the Maastrichtian stage of the Late Cretaceous.
The group is composed of, in ascending order, the Mooreville Chalk Formation, Demopolis Chalk Formation, Ripley Formation, and Prairie Bluff Chalk Formation. Dinosaur and mosasaur remains are among the fossils that have been recovered from the Selma Group.
Fossil Prairie Park: Devonian: North America: US: Iowa: Mazon Creek: Francis Creek Shale: Carboniferous (Pennsylvanian) North America: US: Illinois [Note 1] Ghost Ranch: Triassic: North America: US: New Mexico: Non-Avian Dinosaurs [Note 1] Hagerman Fossil Beds National Monument: Glenns Ferry Formation: Pliocene/Pleistocene: North America: US: Idaho
Ichthyornis fossils were first unearthed in the 1870s, but the new ones from Kansas and Alabama chalk deposits, reveal far more about it than once known. Ancient bird with beak and teeth blended ...
A new study suggests Tyrannosaurus rex had giant, full gums and lips that covered much of their teeth.
A new study says a discovery at Ashdown Brickworks helped unearth a community of dinosaurs.
As of 2016, the only known dinosaurs found in this region include the remains of indeterminate hadrosaur remains, as complete fossil skeletons of dinosaurs are a rarity in Appalachia. [9] [10] Sometimes the dried carcasses of dinosaurs were washed out to sea by rivers. Dinosaur bones and teeth have been found in marine deposits in Mississippi.
However, a 2016 re-evaluation found Polyptychodon and its types species to be dubious, and that numerous remains from the Chalk Group in England that had been referred to the genus most likely represent different species of plesiosaurs, with some teeth possibly being referable to Polycotylidae. [2]