Dinosaurian Faunas of the Cedar Mountain Formation and the Relationship Between the Degree of Abrasion and U-Pb LA-ICP-MS Detrital Zircon Ages for Three Stratigraphic Sections PDF Download
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Author: Hirotsugu Mori
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 102
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Book Description
The Cedar Mountain Formation contains the most diverse record of Early Cretaceous dinosaurs in the western hemisphere. However, analyses of its faunas have been hindered because 1) most taxa are based on incomplete/fragmentary materials or incomplete descriptions, 2) most sites and some horizons preserve few taxa, and 3) the stratigraphy and geochronology are poorly understood.
Author: Hirotsugu Mori
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 102
Get Book Here
Book Description
The Cedar Mountain Formation contains the most diverse record of Early Cretaceous dinosaurs in the western hemisphere. However, analyses of its faunas have been hindered because 1) most taxa are based on incomplete/fragmentary materials or incomplete descriptions, 2) most sites and some horizons preserve few taxa, and 3) the stratigraphy and geochronology are poorly understood.
Author: Hirotsugu Mori
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 102
Get Book Here
Book Description
The Cedar Mountain Formation contains the most diverse record of Early Cretaceous dinosaurs in the western hemisphere. However, analyses of its faunas have been hindered because 1) most taxa are based on incomplete/fragmentary materials or incomplete descriptions, 2) most sites and some horizons preserve few taxa, and 3) the stratigraphy and geochronology are poorly understood.
Author: Kate E. Zeigler
Publisher: Elsevier
ISBN: 0128032448
Category : Science
Languages : en
Pages : 362
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Book Description
Terrestrial Depositional Systems: Deciphering Complexities through Multiple Stratigraphic Methods is the first collection of contributed articles that not only introduces young geoscientists to biostratigraphy, chemostratigraphy, magnetostratigraphy, and lithostratigraphy, but also provides seasoned practitioners with a standard reference that showcases the topic's most recent developments in research and application. When studying complex depositional systems, scientists often need to rely on more than one stratigraphic technique to truly understand the sequence of historical events. Through a blend of specific analytical techniques, experiments, sampling methods, and working examples, this book provides a practical reference for addressing a range of depositional system challenges. This multi-contributed reference combines reviews of stratigraphic methods with individual case studies, providing readers with a broad scope of techniques that will aid their work in the interpretation and understanding of complex depositional systems. - Offers multi-contributed expertise in biostratigraphy, chemostratigraphy, magnetostratigraphy, and lithostratigraphy, ensuring a thorough, yet topical coverage - Features case studies in each chapter that underscore the range of applications of individual stratigraphic methods - Provides detailed explanations of different analyses, data collection methods, and sampling techniques, making the content immediately implementable - Includes more than 100 illustrations, figures, and photographs that provide visual representations of core concepts
Author: M. Wagreich
Publisher: Geological Society of London
ISBN: 1786204746
Category : Science
Languages : en
Pages : 269
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Book Description
Sea-level constitutes a critical planetary boundary for geological processes and human life. Sea-level fluctuations during major greenhouse phases are still enigmatic and strongly discussed in terms of changing climate systems. The geological record of the Cretaceous greenhouse period provides a deep-time view on greenhouse-phase Earthsystem processes that facilitates a much better understanding of the causes and consequences of global, geologically short-term, sea-level changes. In particualr, Cretaceous hothouse periods can serve as a laboratory to better understand a near-future greenhouse Earth. This volume presents high-resolution sea-level records from globally distributed sedimentary archives of the Cretaceous involving a large group of scientists from the International Geoscience Programme IGCP 609. Marine to non-marine sedimentary successions were analysed for revised age constraints, the correlation of global palaeoclimate shifts and sea-level changes, tested for climate-driven cyclicities, and correlated within a high-resolution stratigraphic framework of the Geological Timescale. For hothouse periods, the hypothesis of significant global groundwater-related sea-level change, i.e. aquifer-eustasy as a major process, is reviewed and substantiated.
Author: Douglas A. Sprinkel
Publisher: Utah Geological Survey
ISBN: 1557918635
Category : Dinosaur National Monument (Colo. and Utah)
Languages : en
Pages : 25
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Book Description
This 20 page report describes the stratigraphy of the Cedar Mountain and Dakota formations in and around Dinosaur National Monument in northeast Utah and includes new palynology and radiometric age data. The contract between these formations is unconformable in which the Dakota formation has incised into the underlying Cedar Mountain formation. Locally, the Dakota includes a basal marine mudstone and shale unit that contains late Albian dinoflagellate cysts, which represents peak sea level during the Kiowa-Skull Creek depositional cycle and indicates the first marine incursion of the Cretaceous Western Interior Seaway into Utah.
Author: Mathew W. Stikes
Publisher: Utah Geological Survey
ISBN: 1557917515
Category : Science
Languages : en
Pages : 89
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Book Description
This study characterizes and interprets the fluvial systems responsible for deposition of the Poison Strip sandstone through analysis of extensive field data and comparison to ancient fluvial systems. Conclusions on fluvial style are related to depositional controls and to regional Lower Cretaceous rocks.
Author: Roger D. Miller
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The Early Cretaceous (Barremian-Albian) Burro Canyon Formation in Eastern Utah and Western Colorado is a dominantly fluvial system that resembles the Cedar Mountain Formation, a correlative unit that lies across the Colorado River and is famous for recent dinosaur discoveries, The Burro Canyon Formation is arbitrarily split from the Cedar Mountain Formation using the Colorado River as a dividing line. This non-stratigraphic means of splitting one unit from the other is largely due to convention and it has become entrenched in the literature. Sections measured on Hotel Mesa and Buckhorn Mesa, both in eastern Grand County, Utah, were made in order to better delineate the contact between the two formations in this remote area on the Uncompahgre Plateau. The section on Hotel Mesa is in the Poison Strip Sandstone Member of the Cedar Mountain Formation as demonstrated by correlation to nearby established measured sections. Multiple paleocurrents were taken on Buckhorn Mesa, along with three new measured sections. These measured sections and paleoflows were then used to determine whether these rocks are likely to be in the Burro Canyon Formation or the Cedar Mountain Formation. Facies were established for the outcrops, with preliminary facies associations then being developed and outlined on photographs. Analyses show that these fluvial sandstones on this edge of the Uncompahgre Plateau are all in the Poison Strip Sandstone Member of the Cedar Mountain Formation. Also, no other Early Cretaceous sediments are found on this entire portion of the Plateau, as illustrated using panoramic photographs.
Author: Ronald C. Blakey
Publisher: Springer
ISBN: 3319596365
Category : Science
Languages : en
Pages : 234
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Book Description
Allow yourself to be taken back into deep geologic time when strange creatures roamed the Earth and Western North America looked completely unlike the modern landscape. Volcanic islands stretched from Mexico to Alaska, most of the Pacific Rim didn’t exist yet, at least not as widespread dry land; terranes drifted from across the Pacific to dock on Western Americas’ shores creating mountains and more volcanic activity. Landscapes were transposed north or south by thousands of kilometers along huge fault systems. Follow these events through paleogeographic maps that look like satellite views of ancient Earth. Accompanying text takes the reader into the science behind these maps and the geologic history that they portray. The maps and text unfold the complex geologic history of the region as never seen before. Winner of the 2021 John D. Haun Landmark Publication Award, AAPG-Rocky Mountain Section
Author: Spencer G. Lucas
Publisher: Geological Society of London
ISBN: 9781862392960
Category : Cyclostratigraphy
Languages : en
Pages : 528
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Book Description
The Mesozoic Era begins with the approximately 50-million-year-long Triassic Period, a major juncture in Earth history when the vast Pangaean supercontinent completed its assembly and began its fragmentation, and the global biota diversified and modern-ized after the end-Permian mass extinction, the most extensive biotic decimation of the Phanerozoic. The temporal ordering of geological and biotic events during Triassic time thus is critical to the interpretation of some unique and pivotal events in Earth his-tory. This temporal ordering is mostly based on the Triassic time-scale, which has been developed and refined for nearly two centu-ries. This book reviews the state of the art of the Triassic timescale and includes comprehensive analyses of Triassic radio-isotopic ages, magnetostratigraphy, isotope-based and cyclostratigraphic correlations and timescale -relevant marine and non-marine bio-stratigraphy.
Author: Bertelsmann Stiftung
Publisher: Verlag Bertelsmann Stiftung
ISBN: 3867936080
Category : Political Science
Languages : en
Pages : 417
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Book Description
What reforms must governments initiate in order to ensure the sustainability of their societies? What examples of success can we identify by systematically comparing countries around the world? And who will shape the political and economic future in the 21st century? This E-Book Reader is a supplement to the upcoming edition (June 2014) of our Germanlanguage quarterly change, which takes as its focus "A World in Transition." Addressing sustainability in governance, strategic steering capacity in policymaking, and the most important global and regional developments of the past three years, the contributions featured here are excerpts from publications published by the Verlag Bertelsmann Stiftung.
