The Morrison Formation is a hotbed of dinosaur fossils. Spanning across much of the western U.S., this layer of rock dates to the Late Jurassic, some 163.5 million to 145 million years ago. It holds ...

A team of geologists at the University of Texas suggests that a collection of smooth, red quartzite cobbles, found in the Morrison Formation of Wyoming, was deposited there by dinosaurs coming from ...

Getting your Trinity Audio player ready... Two scientists spent months debunking a long-standing dinosaur classification. Then, they used dinosaur bones discovered in Colorado, previously ...

Rainbow country : an introduction to Morrison Formation geology -- Vertebrates and the Jurassic world -- The Morrison vertebrates come to light -- The picture fills in -- Fins, scales, and wings : the ...

A headless Haplocanthosaurus, laid out at the Utah Field House of Natural History. Photo by the author The Morrison Formation is one of the most wonderful slices of prehistoric time found anywhere in ...

Learn how fossils from Colorado’s Morrison Formation helped researchers reconstruct a Late Jurassic food web and uncover the role of young sauropods. Sauropods, the long-neck dinosaurs that towered ...

The Morrison Formation is a fossil wonderland. Inside these layers of multi-colored sedimentary stone, the remains of Allosaurus, Stegosaurus, Apatosaurus and more have been found through more than a ...

Long before Tyrannosaurus rex, Allosaurus was the dominant predator of North America’s Late Jurassic ecosystems. Fossils from ...