The Demopolis Chalk is a geological
formation
Formation may refer to:
Linguistics
* Back-formation, the process of creating a new lexeme by removing or affixes
* Word formation, the creation of a new word by adding affixes
Mathematics and science
* Cave formation or speleothem, a secondary ...
in
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
, within the
U.S. states of
Alabama,
Mississippi, and
Tennessee. The
chalk was formed by
pelagic sediments deposited along the eastern edge of the
Mississippi embayment during the middle
Campanian stage of the
Late Cretaceous.
[Carr, T.D., Williamson, T.E., & Schwimmer, D.R. 2005. A new genus and species of tyrannosauroid from the Late Cretaceous (middle Campanian) Demopolis Formation of Alabama. ''Journal of Vertebrate Paleontology'' 25(1): 119–143.] It is a unit of the
Selma Group and consists of the upper Bluffport Marl Member and a lower unnamed member.
and
mosasaur remains are among the fossils that have been recovered from the Demopolis Chalk.
[Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. .]
Vertebrate paleofauna
Fish
Cartilaginous fish
Bony fish
Reptiles
Dinosaurs
Indeterminate hadrosaurid remains have been found in
Tennessee.
Possible indeterminate tyrannosaurid remains have been found in
Alabama.
Mosasaurs
Plesiosaurs
See also
*
List of dinosaur-bearing rock formations
*
List of fossil sites
References
{{Reflist
Geologic formations of Mississippi
Upper Cretaceous Series of North America
Cretaceous Alabama
Cretaceous geology of Tennessee
Chalk