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Fallen vegetation sank into swamp waters where oxygen was scarce
Sea-Level Changes:Dating of Strombus bubonius deposits contributes to the reconstruction of Eemian and earlier interglacial sea-level fluctuations
which makes them the first known animals with a skeleton and allows for exceptional preservation as fossils
Evidence for this comes from a huge bite wound inflicted on the back of an Edmontosaurus that closely matches the shape of a Tyrannosaurus mouth
1.4" Corythosaurus Fossil Finger Bone Judith River FM Cretaceous Dinosaur MT Zizyphoides Flabellum Fallen vegetation sank into swampLocation: Judith River Formation, Central Montana (Private Land Origin) Weight: 0. 8 Ounces Dimensions: 1. 4 Inches Long, 1. 3 Inches Wide, 0. 9 Inches Thick Comes with a Certificate of Authenticity. The item pictured is the one you will receive. Late Cretaceous, 83 million years old. Name: Corythosaurus Type: Herbivore Size: 9 meters in length. Corythosaurus is a genus of hadrosaurid, or duck billed, dinosaurs that lived during the Upper Cretaceous