Download or read book Taphonomy of Three Monospecific Dinosaur Bone Beds in the Late Cretaceous Two Medicine Formation Northwestern Montana written by Raymond R. Rogers and published by . This book was released on 1989 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taphonomy of the Sun River Bonebed Late Cretaceous Campanian Two Medicine Formation of Montana written by Benjamin Andrew Scherzer and published by . This book was released on 2008 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the summer of 1998, a bonebed of juvenile dinosaur material was found in beds of the Two Medicine Formation along the Sun River in Teton County, Montana. Initial inspection of the "Sun River Bonebed" indicated unique dominance by juvenile remains and unusually high concentration of fossil material. Modern exposure of both the bonebed and surrounding strata allowed for a detailed taphonomic study of the assemblage. In the summer of 2004, the bonebed was excavated in a fashion that recorded depthwise taphonomic data of fossil material and surrounding sediment, and allowed for three-dimensional reconstruction of the bonebed. The lithology of the surrounding beds was documented for 120 m immediately below and 40 m immediately above the bonebed to interpret the overall depositional environment of the area. Lastly, the paleobiologic and sedimentologic interpretations made for the bonebed were compared to bonebeds of similar fauna in the Two Medicine Formation. Taphonomic attributes of the fossil material indicate a mass death assemblage of late juvenile lambeosaurines subject to post-mortem bioturbation and possible fluvial transport. A number of elements from the assemblage exhibit a rare form of taphonomic modification known as "wet rot," currently documented in only one other dinosaur bonebed. Sedimentologic and additional taphonomic data in the assemblage indicate entrainment of the vertebrate material in a cohesive debris flow and ultimate deposition in the respective flow deposit. The sedimentology of the surrounding beds indicates ultimate deposition in an ephemeral fluvial environment. The restricted age class representation of the assemblage lends credence to existing paleobiologic interpretations of hadrosaurids in the Late Cretaceous of Montana, and the Sun River Bonebed is significant in its exhibition of "wet rot" modification and in being one of a restricted number of documented debris-flow hosted vertebrate bonebeds.
Download or read book Vertebrate Paleontological Techniques Volume 1 written by Patrick Leiggi and published by Cambridge University Press. This book was released on 2005-06-02 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Everything that amateur and professional fossil hunters will ever need to know about modern palaeontological techniques and practice.
Download or read book DINOSORES An Annotated Bibliography of Dinosaur Paleopathology and Related Topics 1838 2001 written by Darren H. Tanke and published by New Mexico Museum of Natural History and Science. This book was released on 2002 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taphonomy of Jack s Birthday Site a Diverse Dinosaur Bonebed from the Upper Cretaceous Two Medicine Formation of Montana written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Jack s Birthday Site a Diverse Dinosaur Bonebed from the Cretaceous Two Medicine Formation of Montana written by David Joseph Varricchio and published by . This book was released on 1995 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Plenum Publishing Corporation. This book was released on 1992 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses Listed by Discipline: Aerospace Engineering. Agricultural Economics, Sciences and Engineering. Architechtural Engineering and Urban Planning. Astronomy. Astrophysics. Ceramic Engineering. Communications Engineering and Computer Science. Cryogenic Engineering. Electrical Engineering. Engineering Mechanics. Engineering Physics. Engineering Science. Fuels, Combustion, and Air Pollution. General and Environmental Engineering. Geochemistry and Soil Science. Geological Sciences and Geophysical Engineering. Geology and Earth Science. Geophysics. Industrial Engineering. Marine and Ocean Engineering. Materials Science and Engineering. Mechanical Engineering and Bioengineering. Metallurgy. Meteorology and Atmospheric Science. 17 additional disciplines. Index.
Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 1993 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentology and Taphonomy of a Dinosaur Bonebed from the Upper Cretaceous Campanian Judith River Formation of North Central Montana written by Jeffrey William LaRock and published by . This book was released on 2000 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diversity Biogeography and Taphonomy of Late Cretaceous Chondrichthyans from Montana written by Yasemin Ifakat Tulu and published by . This book was released on 2010 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bonebeds written by Raymond R. Rogers and published by University of Chicago Press. This book was released on 2010-02-15 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vertebrate fossil record extends back more than 500 million years, and bonebeds—localized concentrations of the skeletal remains of vertebrate animals—help unlock the secrets of this long history. Often spectacularly preserved, bonebeds—both modern and ancient—can reveal more about life histories, ecological associations, and preservation patterns than any single skeleton or bone. For this reason, bonebeds are frequently studied by paleobiologists, geologists, and archeologists seeking to piece together the vertebrate record. Thirteen respected researchers combine their experiences in Bonebeds, providing readers with workable definitions, theoretical frameworks, and a compendium of modern techniques in bonebed data collection and analysis. By addressing the historical, theoretical, and practical aspects of bonebed research, this edited volume—the first of its kind—provides the background and methods that students and professionals need to explore and understand these fantastic records of ancient life and death.
Download or read book Contributions to Late Cretaceous Stratigraphy and Paleontology Western Montana written by T. S. Dyman and published by . This book was released on 1991 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taphonomy Geology and Paleoecology of the Sandy Site an Exceptional Assemblage in the Maastrichtian Hell Creek Formation of South Dakota written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sandy Site is a multispecific terrestrial deposit in the fluvial sediments of the Upper Cretaceous Hell Creek Formation. It captures a diversity of Late Cretaceous dinosaurs and other vertebrates. Over three thousand bones represent at least fifty genera of birds, pterosaurs, terrestrial and aquatic tetrapods, and fish. Ten of the eleven dinosaur families found throughout the formation have been recognized at this quarry. Detailed taphonomic observations included abrasion, bone completeness, skeletal representation. These and a number of qualitative features indicated two distinct bonesets in the assemblage. An allochthonous suite included bones of tyrannosaurs, hadrosaurs and ceratopsians, which possessed taphonomic signatures similar to exotic aquatic vertebrate specimens. Smaller, unusual dinosaurs comprised a parautochthonous group with mammals, birds, pterosaurs, and small herpetofauna. Sedimentologic data suggest a fluvial crevassing event as the most likely depositional setting. Crevasse channel deposition fits with the Sandy microstratigraphic package and structures present, the narrow time resolution, and the dual nature of the taphocoenosis. A direct cause of mortality cannot be identified, but that agent and the subsequent burial of the taphocoenosis apparently occurred in two steps. Comparison with other sites indicates that Sandy was a product of fortuitous set of repeatable events, and that similar depositional environments produce mixed assemblages with multispecific parautochthonous components. The autochthonous assemblage presents a Sandy paleofauna different from conventional reconstructions of the Hell Creek Formation. Smaller dinosaurs prevailed in this setting, in marked contrast to the dominance of a few megafaunal taxa presented in previous reconstructions. The original faunule has a size structure similar to modern mammal communities. The regional ecology may have been mosaic rather than homogeneous, where large dinosaurs lived near but s.
Download or read book Comparative Taphonomy and Paleoecological Reconstruction of Two Microvertebrate Accumulations from the Late Cretaceous Hell Creek Formation Maastrichtian Eastern Montana written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of a Regionally Significant Terrestrial Bounding Surface in the Upper Cretaceous Two Medicine Formation Northwestern Montana written by Bolton J. Howes and published by . This book was released on 2015 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-scale data recovered from a fluvial disconformity support the identification of a sequence boundary in fully terrestrial strata of the ZUpper Cretaceous (Campanian) Two Medicine Formation in northwestern Montana. This sandstone was previously interpreted as a sequence boundary based on several meters of internal erosional scour, a thick and laterally persistent intraclast lag facies, and pervasive oxidation that mark the disconformity. Recognition of numerous outcrop scale features supports the contention that this fluvial disconformity is a sequence boundary. Physical stratigraphic evidence and associated age data indicate that this fluvial disconformity correlates with widespread erosion and base level fall in distal parts of the basin that transpired at ~81 Ma. Data indicate that the fluvial disconformity in the lower Two Medicine Formation feflects a negative base-level adjustment that occurred at the end of the Telegraph Creek-Eagle regression (R7). Paralic deposits of the subsequent Claggett transgression (T8) overlie the disconformity. Recognition of this disconformity is significant because it is one of very few well-documented examples of a nonmarine sequence boundary. Detrital composition data indicate that there are no significant compositional changes across the sequence boundary. Sandstones spanning the disconformity can be classified as litharenites, and all yield abundant volcanic rock fragments. There is no apparent change in provenance across the sequence boundary. in contrast, there is a distinct diagenetic signature associated with the sequence boundary, as evidenced by changes in the cement/framework grain ratio, grain packing, and grain deformation. Abundant calcite cement and loose grain packing characterize the sandstone body hosting the sequence boundary. Less ce3ment, tighter grain packing, and post-depositional deformation characterize fluvial sandstones intercalated below tha above sequence boundary.
Download or read book Taphonomy and Sedimentology of the Mason Dinosaur Quarry Hell Creek Formation upper Cretaceous South Dakota written by Jon P. Christians and published by . This book was released on 1992 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brachyceratops written by Charles Whitney Gilmore and published by Nabu Press. This book was released on 2014-03 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
