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New mosasaur specimens, such as NDGS 10838, help experts to unravel “the rich evolutionary history of these rather charismatic apex predators of the Cretaceous seas,” he said.
A rare fossil of an adolescent Tyrannosaurus rex has been excavated in North Dakota's badlands - a find noteworthy for the scientific insight it may offer into the life history of this famous ...
Three North Dakota schoolboys made a larger-than-life discovery when they stumbled across a T rex skeleton during a hike.. Two young brothers and their cousin were wandering through a fossil-rich ...
A few taxa were collected at Brownie Butte Montana by Shoemaker, but most plants were collected from North Dakota (Slope County) and from South Dakota. Among the localities, the Mud Buttes, located in Bowman County, North Dakota, is probably the richest megaflora assemblage known and the most diverse leaf quarry from the Hell Creek Formation ...
The first scientifically documented fossils in North Dakota were collected during the Lewis and Clark Expedition between 1804 and 1806 as they mapped the course of the Missouri River. The first fossil written about in the state were petrified wood preserved in sandstone concretions discovered at the Cannonball River .
The Wannagan Creek site is a fossil site found just west of the South Unit of Theodore Roosevelt National Park of North Dakota, US. The site is Paleocene in age, approximately 60 million years old. Paleontologists of the Science Museum of Minnesota have studied the site for nearly thirty years.
Based on early estimates, Lyson thinks the fossil is that of a young T. rex that died of an unknown cause when it was 13 or 15 years old. It was about 25 feet long and weighed about 3,500 pounds.
The holotype specimen was first discovered as a single piece of bone in 2015 by Deborah Shepherd while revisiting a public fossil dig site near Walhalla, North Dakota. The fossil came from a bentonite layer of the Pembina Member of the Pierre Shale, radiometrically dated to about 80.04 ± 0.11 mya. Shepherd informed a park ranger about the bone ...