Download or read book Depositional Environments of the Late Cretaceous Maastrichtian Dinosaur bearing Prince Creek Formation written by Peter Paul Flaig and published by . This book was released on 2010 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Prince Creek Formation contains first-order meandering trunk channels, second order meandering distributary channels, third-order fixed anastomosed(?) distributary channels, crevasse splays, levees, lakes, ponds, swamps, paleosols, and ashfall deposits. Trampling by dinosaurs is common. Most deposition occurred on crevasse splay-complexes adjacent to trunk channels. Rhythmically-repeating coarse-to fine-grained couplets in inclined heterolithic stratification suggest tidal-influence in channels. Cumulative to compound soils similar to Entisols, Inceptisols, and potential acid sulfate soils formed on levees, point bars, crevasse splays, and on the margins of lakes and swamps. Frequent overbank flooding is evidenced by silt and sand dispersed throughout paleosol profiles and fluctuations with depth in several molecular ratios. Drab colors, organics, siderite, depletion coatings, and zoned peds indicate waterlogged, anoxic conditions while ferruginous and manganiferous features, insect and worm burrows, and rare illuvial clay coatings and infillings suggest drying and oxidation of some soils. Repeated wetting and drying is tied to fluctuating river discharge. Marine influence is evidenced by jarosite, pyrite, and gypsum which become increasingly common up-section near the contact with the shallow-marine Schrader Bluff Formation. Recovered biota include Peridinioid dinocysts; algae; projectates; Wodehouseia edmontonicola; pollen from lowland trees, shrubs and herbs; Bisaccates; fern and moss spores; and fungal hyphae and indicates that all strata are Early Maastrichtian and that sediments become progressively younger from measured section NKT in the south to measured section LBB in the north. 40Ar/39Ar analysis of a tuff returned an age of 69.2 ± 0.5 Ma in the Sling Point outcrop belt. World-class dinosaur bonebeds are encased in muddy overbank alluvium overlying floodplains. No concentration of bone was found in channels. Bonebeds are laterally extensive except where truncated by distributaries. At the Sling Pont, Liscomb, and Byers bonebeds alluvium encasing bone exhibits a bipartite division of flow and a massive mudstone fades containing flow-parallel plant fragments that 'float' in a mud matrix suggesting deposition by fine-grained hyperconcentrated flows. Exceptional floods driven by seasonal snowmelt in the Brooks Range increased suspended sediment concentrations, generating hyperconcentrated overbank flows that killed and buried scores of juvenile dinosaurs occupying this high-latitude coastal plain. This unique killing mechanism likely resulted from fluctuating discharge tied to seasonality brought about by the near polar latitude of northern Alaska in the Late Cretaceous"--Leaves iii-iv.

Download or read book Isotopic Studies in Cretaceous Research written by A.-V. Bojar and published by Geological Society of London. This book was released on 2014-01-24 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Isotopic studies combined with geochemical, lithological, mineralogical and palaeontological investigations have been widely used in reconstructing Cretaceous marine and continental environments. Furthermore stable and radiogenic isotope trends play an important role in the interpretation of the causes and consequences of biotic turnovers at stratigraphic boundaries as well as in global correlations.

Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2011 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Perspectives on Horned Dinosaurs written by Michael J. Ryan and published by Indiana University Press. This book was released on 2010 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Easily distinguished by the horns and frills on their skulls, ceratopsians were one of the most successful of all dinosaurs. This volume presents a broad range of cutting-edge research on the functional biology, behavior, systematics, paleoecology, and paleogeography of the horned dinosaurs, and includes descriptions of newly identified species.

Download or read book Vertebrate Ichnology and Paleoenvironmental Associations of Alaska s Largest Dinosaur Track Site in the Cretaceous Cantwell Formation Maastrichtian of Denali National Park and Preserve written by Dustin G. Stewart and published by . This book was released on 2020 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Upper Cretaceous Cantwell Formation in Denali National Park and Preserve (DENA) has recently been recognized as a major high latitude dinosaur track-bearing unit in Alaska. The abundant trace fossil record of the Cantwell Formation, which represents a diverse community of avian and non-avian dinosaurs, compliments the body fossil record of the state’s other major dinosaur-producing unit, the Prince Creek Formation of northern Alaska. However, research in the Cantwell Formation is still in its infancy due to its wide aerial extent and remoteness, and many questions remain concerning the temporal, ichnological, and paleoenvironmental relationships of the formation. Here I describe and analyze the largest known single track site currently known in DENA and all of Alaska — a football field-sized outcrop named the Coliseum. This site is composed of 65+ meters of vertical section, with laterally extensive fine- to medium-grained sandstone, indurated mudstone, fissile shale, and bentonite. Trace fossils at the Coliseum include true tracks, undertracks, natural casts, and trackways that vary in their preservation from eroded, trampled surfaces to individual prints with skin impressions. The tracks were documented via handheld and UAV-assisted photogrammetry, enabling a large-scale 3-dimensional mapping of the Coliseum. Facies analysis of the site reveal the tracks were formed on crevasse splay and overbank deposits within a fluvial floodplain. U-Pb dating of zircons collected from a bentonite horizon return an age of 69.3±0.9 Ma (early Maastrichtian), improving the temporal constraints of the formation and revealing one of the youngest ages of deposition for the formation. Several new dinosaurian ichnotaxa previously unrecognized from the formation are described, revealing the presence of large-bodied ornithopods, ceratopsids, and non-avian and avian theropod trackmakers. The Coliseum provides a snapshot of an ancient forested environment inhabited by a diverse dinosaurian community deposited in the Late Cretaceous paleo-Arctic.

Download or read book Tracking Dinosaurs written by M. G. Lockley and published by CUP Archive. This book was released on 1991-09-27 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete guide to dinosaur tracking. A popular science book on dinosaur footprints and what they reveal about dinosaurs and their habitats.

Download or read book The Indian Mesozoic Chronicle written by Jai Krishna and published by Springer. This book was released on 2017-03-11 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews and summarizes the Indian Mesozoic geological evolution in an innovative alternative perspective of sequence stratigraphy. It mainly focuses on the Jurassic interval, but also concisely discusses the preceding Triassic and Cretaceous geological records. The key to the study is primarily held in the recently developed ammonoid based high resolution scales in the Triassic and Jurassic period. The Indian Jurassic record is thus elevated to a high resolution pedestal. The large intra-Jurassic stratigraphic gap in Kachchh, with increase in duration from margin to basin, has been précised in different sections, along with radical revision of its long held interpretation from sub-aerial to sub-marine all over from Arabia to Australia. Other significant gaps are also differentiated into sub-aerial and sub-marine. The Indian Late Precambrian – Neogene record is organized into five mega-sequences. Among these, the fourth – also the most important one – includes the intra-Permian to Early Eocene interval from the origin to the closure of the Neotethys. Based on multidisciplinary integration of the Indian Mesozoic geological record and comparison with hydrocarbon producing basins on east and west of India, a highly positive scenario of the hydrocarbon source/reservoir sediment perspective is outlined in the book in sequence stratigraphic backdrop as an edifice for future elaborate evaluation.

Download or read book Geologic Studies in Alaska by the U S Geological Survey 1989 written by James H. Dover and published by . This book was released on 1990 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Depositional Environments and Paleontology of the Upper Cretaceous Dakota Formation Kane County Utah written by Barbara Anne Am Ende and published by . This book was released on 1987 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dinosauria written by David B. Weishampel and published by Univ of California Press. This book was released on 2007-12-17 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition includes coverage of dinosaur systematics, reproduction, life history strategies, biogeography, taphonomy, paleoecology, thermoregulation & extinction.

Download or read book Vertebrate Paleontology in Utah written by David D. Gillette and published by Utah Geological Survey. This book was released on 1999 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 52 papers in this vary in content from summaries or state-of-knowledge treatments, to detailed contributions that describe new species. Although the distinction is subtle, the title (Vertebrate Paleontology in Utah) indicates the science of paleontology in the state of Utah, rather than the even more ambitious intent if it were given the title “Vertebrate Paleontology of Utah” which would promise an encyclopedic treatment of the subject. The science of vertebrate paleontology in Utah is robust and intense. It has grown prodigiously in the past decade, and promises to continue to grow indefinitely. This research benefits everyone in the state, through Utah’s muse ums and educational institutions, which are the direct beneficiaries.

Download or read book Special Papers written by and published by . This book was released on 1934 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Life History of a Fossil written by Pat Shipman and published by . This book was released on 1993 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pat Shipman sets forth the taphonomic methods of analyzing how animal remains are acted upon and altered, both by biological and by geographic phenomena, in their passage from the biosphere of bones and carcass into the lithosphere of fossils. She explains the role of disease, predation, accidents, postmortem destruction, and transport in the life history of a fossil, and provides an introduction to the relevant geological concepts and to faunal analysis.

Download or read book Geologic Studies in Alaska by the U S Geological Survey During written by and published by . This book was released on 1990 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dinosaur Tracks and Traces written by David D. Gillette and published by Cambridge University Press. This book was released on 1989 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book ever to be devoted to this subject.

Download or read book Alluvial Fans written by Adrian M. Harvey and published by Geological Society of London. This book was released on 2005 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alluvial fans are important sedimentary environments. They trap sediment delivered from mountain source areas, and exert an important control on the delivery of sediment to downstream environments, to axial drainages and to sedimentary basins. They preserve a sensitive record of environmental change within the mountain source areas. Alluvial fan geomorphology and sedimentology reflect not only drainage basin size and geology, but change in response to tectonic, climatic and base-level controls. One of the challenges facing alluvial fan research is to resolve how these gross controls are reflected in alluvial fan dynamics and to apply the results of studies of modern fan processes and Quaternary fans to the understanding of sedimentary sequences in the rock record. This volume includes papers based on up-to-date research, and focuses on three themes: alluvial fan processes, dynamics of Quaternary alluvial fans and fan sedimentary sequences. Linking the papers is an emphasis on the controls of fan geomorphology, sedimentology and dynamics. This provides a basis for integration between geomorphological and sedimentological approaches, and an understanding how fluvial systems respond to tectonic, climatic and base-level changes.