| OCR Text |
Show paleoenvironments. The biostratigraphy of the type locality presented herein is based on dinosaurs (bones, tracks, eggshell of A/amosaurus, Tyrannosaurus, Torosaurus, hadrosaurs, and others), crocodilians, lizards (Po/yg/yphanodon), (Basi/emys, Adocus, Compsemys, Trionychids), fish (Lepisosteus), turtles mollusks, ostracods, charophytes, plants and invertebrate traces. This study is the first that places formation into a the well-known vertebrate fossils and others from this correlated stratigraphic context. Dinosaur track beds, which fill gaps in the dinosaur aid the an interpretation of the paleoenvironments represented by the lower anastomosed fluvial wetlands. At the system in type section, base of the formation up to which are Track occurrence were biostratigraphy, interpreted to a a semiarid flood basin track beds vertically few meters below the occur immediately below having unit as seasonal span at least 183 m from the highest dinosaur eggshells, the K-T boundary in the North Horn Formation suggests that large interval. dinosaurs present in central Utah until very shortly before the K- T boundary. v also |
