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Tanis is a paleontological site in southwestern North Dakota, United States. It is part of the heavily studied Hell Creek Formation, a geological region renowned for many significant fossil discoveries from the Upper Cretaceous and lower Paleocene.
The Hell Creek Formation is an intensively studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. [1]
This list of the prehistoric life of North Dakota contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of North Dakota. Precambrian [ edit ]
This article contains a list of fossil-bearing stratigraphic units in the state of North Dakota, U.S. Sites. Group or Formation ... Hell Creek Formation: Cretaceous:
Throughout the remainder of the Cenozoic, North Dakota's climate cooled and dried. The state's swamps vanished and their inhabitants became extinct. In their place woodlands formed. The climate got colder still and eventually glacial activity reshaped the state's landscape. At this time North Dakota was home to mammoths and mastodons. [1]
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there. Many of the entries in this list are considered Lagerstätten (sedimentary deposits
The fossil itself has a somewhat less poetic name: NDGS 10838. It includes a near-complete skull with a bony ridge over the eyes as well as jaws and some skeletal parts, including 11 ribs and 12 ...
South Dakota [9] Lower to upper Hell Creek Formation [10] 40 specimens [11] A genus of prehistoric sharks in the family Hybodontidae. It makes up 0.4% of the remains of the vertebrates of the Hell Creek Formation. [8] Myledaphus [28] M. pustulosus [28] Montana [28] North Dakota [9] South Dakota [9] Lower to upper Hell Creek Formation. [10]