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Map of the Hell Creek and Lance Formations in western North America. The Hell Creek Formation in Montana overlies the Fox Hills Formation and underlies the Fort Union Formation, and the boundary with the latter occurs near the Cretaceous–Paleogene boundary (K–Pg), which defines the end of the Cretaceous period and has been dated to 66 ± 0. ...
The Hell Creek Formation is a well-known and much-studied fossil-bearing formation (geological region) of mostly Upper Cretaceous and some lower Paleocene rock that stretches across portions of Montana, North Dakota, South Dakota, and Wyoming in North America. The formation is named for early studies at Hell Creek, located near Jordan, Montana ...
South Dakota [9] Middle Hell Creek Formation [10] 5 specimens previously assigned to Squatirhina [11] A wobbegong-like shark. [28] Formerly assigned to Squatirhina. The remains consist of 0.05% of the vertebrates. [11] Also known from the Lance Formation. [28] Carcharhinidae indet. [29] Indeterminate South Dakota; An isolated tooth ...
Dakota (specimen NDGS 2000) is the nickname given to an important Edmontosaurus fossil found in the Hell Creek Formation in North Dakota. It is about 67 million years old, [ 1 ] placing it in the Maastrichtian , the last stage of the Cretaceous period .
In 1999 when he was still in high school, Lyson discovered the Dakota dinosaur specimen while exploring the Hell Creek Formation in North Dakota, on his uncle's ranch. The find is unique since the fossilized remains include skin and other soft tissues in a non-collapsed state; a very few other finds have occurred where petrified soft tissue has ...
This article contains a list of fossil-bearing stratigraphic units in the state of North Dakota, U.S. Sites ... Golden Valley Formation: Paleogene: Hell Creek Formation:
The western two-thirds of the state is underlain by an extensive sandstone aquifer, mainly in the Fox Hills Formation and the lower Hell Creek Formation. Although it is close to the surface in the east, it slopes to up to 2000 feet below the ground surface in south-central North Dakota.
Dakotaraptor compared to contemporaneous fauna of the Hell Creek Formation (Dakotaraptor in caramel brown) Dakotaraptor is the first medium-sized predator discovered in the Hell Creek Formation (aside from the dubious Nanotyrannus), intermediate in length between the giant tyrannosaurid Tyrannosaurus and smaller Deinonychosaurians, like ...