Various dinosaurs of the Hell Creek Formation
Various dinosaurs of the Hell Creek Formation. Hell Creek Formation is a geologic formation spanning Montana, Wyoming, North Dakota and South Dakota. It dates from the end of the Cretaceous into the early Paleogene. It was a time about 68-66 million years ago. Denizens of this time and place included the ceratopsian; Torosaurus, the hadrosaur; Edmontosaurus, and Tyrannosaurus Rex. An early mammal and possible proto-primate of the time was Purgatorius. It was smaller than a squirrel
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Beginnings Cerapoda Ceratopsid Duckbill Ecology Edmontosaurus Fern Frill Grazing Hadrosaur Hadrosaurid Herd Horned Lush Maastrichtian Megafauna Ornithischia Ornithopod Paleoart Paleoecology Paleogene Paleogeography Primate Riverbank Roaming Spiked Swamp Torosaurus Tyrannosaurus Vegetation Wetlands Woodlands
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