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The AAPG/Datapages Combined Publications Database
Utah Geological Association
Abstract
Biostratigraphy of the North Horn Formation at North Horn Mountain, Emery County, Utah
Abstract
A general biostratigraphic chart of the North Horn Formation type locality synthesizes a suite of published and new faunal and stratigraphic information. Vertebrate bone, eggshell and track bed data, as well as invertebrate, plant, microfossil and trace fossils, are plotted against time to reveal patterns of stratigraphic fossil diversity and possible fossil co-occurrences, and to allow paleoenvironmental interpretations. It illustrates that much supporting data concerning paleoenvironments and paleoclimate can be derived from invertebrates, microfossils, plants and trace fossils. When systematically placed in a stratigraphic arrangement, all fossils from small fossil fragments to spectacular specimens such as Alamosaurus and Tyrannosaurus rex are together useful for reconstructing the North Horn ecosystem of central Utah. New macrofossil and pollen data better define the K-T transition than was previously possible. Some of the stratigraphy is updated from previous reports. North Horn Mountain is overall the most paleontologically useful area of the Cretaceous part of the North Horn Formation of the central Wasatch Plateau.
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