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Showing 1 to 20 of 27 for “"Late Devonian."”.
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Alamo impact event, Late Devonian, Nevada: crater phenomena and distal products
Includes bibliographical references.
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Late Devonian and Early Mississippian Conodont Faunas of the Upper Mississippi Valley
Made available in DSpace on 2014-12-04T19:13:45Z (GMT). No. of bitstreams: 1 5805493.pdf: 11303925 bytes, checksum: df38902d344f636ace46a6d08f07e954 (MD5) Previous issue date: 1958
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Lithostratigraphic investigation of a Late Devonian carbonate-evaporite sequence; the Duperow Formation, Williston Basin, North Dakota
… marine shelf during the early part of the Late Devonian (Frasnian). The formation forms the lower part of the Jefferson Group and lithostratigraphic review permits three informal members to be recognized: lower, middle, and upper. Petrographic, lithologic, and well log examination of drill …
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Stratigraphic partitioning and reservoir distribution of the Late Devonian to Early Mississippian Exshaw Formation, Western Canada Sedimentary Basin.
The Late Devonian to Early Mississippian Exshaw Formation is a black shale reservoir within the Western Canada Sedimentary Basin (WCSB) that accumulated as an organic-rich basinal mudrock within a tectonically extensional region prone to horst and graben structures. This study characterizes …
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Identification of a thermal maturation high, revised maturity map, and production trends of the Late Devonian Duvernay Formation, Alberta, Canada.
The Late Devonian Duvernay Formation in the Western Canada Sedimentary Basin is a prolific shale reservoir that has been developed since 2010 and produced 250 million barrels of oil equivalent. Regional thermal maturity trends across central and southern Alberta published in the literature are …
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Unraveling Paleoenvironmental Stress in the Late Devonian and Mississippian: Insights into Redox Dynamics and Photosynthetic Adaptations Elucidated Through Geochemical Proxies
The Late Devonian and Mississippian Periods (382.7 to 358.9 million years ago) were key moments in the history of our planet. They contain one of the five major mass extinctions of the Phanerozoic which saw profound environmental and ecological disturbances and changed the trajectory of both marine …
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Selected Famennian (Late Devonian) events (Condroz, Annulata, Hangenberg) in Sardinia and in the Carnic Alps: conodont biostratigraphy, magnetic susceptibility and geochemistry.
… different for each one. The Condroz event is related to a sharp regression associated with an extinction of few ammonoid groups. The Annulata event to a transgression associated with a global spread of the ammonoid Platyclymeniae annulata. The Hangenberg event is a major event, that took place …
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Sequence Stratigraphy, Depositional Environments, and Regional Mapping of the Late Devonian Interval, Upper Three Forks Formation, Sanish Member, and Lower Bakken Shale, U.S. Portion of the Williston Basin
Cores of the Late Devonian upper Three Forks, Sanish, and lower Bakken units from eight wells were examined and described at the North Dakota core depository. Core descriptions, wireline log correlation and mapping, and X-ray diffraction (XRD) data were integrated to recognize seven facies: The …
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Quantifying the Biogeochemical Impact of Land Plant Expansion in the Mid Devonian and Implications in Marine Anoxic Events
… root systems occurred stepwise throughout the Devonian, with the first evidence of complex root systems appearing in the mid-Givetian. This biological innovation provided an enhanced pathway for the transfer of terrestrial phosphorus (P) to the marine system via weathering and erosion. This …
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Terrestrial paleoecology of distal deltaic environments of the upper Mississippian Bluefield, Hinton and Bluestone formations of southwestern Virginia and southern West Virginia
… Virginia, that expose the Early Carboniferous (Late Mississippian) Bluefield, Hinton, and Bluestone Formations, were measured. Geological structures and paleontological occurrences were recorded. In situ rooted plants were compared with transported plant and animal assemblages from fluvially …
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Orbital-scale fluctuations in continental weathering flux and continental ice-volume during greenhouse and icehouse climate intervals : evidence from oxygen and neodymium isotopes
… during two global greenhouse intervals: the Late Silurian and Late Devonian. The first study (Chapter 1) explores whether glacio-eustasy was the driver for orbital-scale shallowing-upward cycles developed in Late Silurian and early Late Devonian tropical and subtropical greenhouse climates. …
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Influence of the West Virginia Dome on paleocurrent patterns in the Upper Devonian-Lower Mississippian Price Formation in the Central Appalachians
Upper Devonian-Lower Mississippian sedimentation was influenced by a positive area known as the West Virginia Dome located in the Central Appalachians of West Virginia. Paleocurrent data collected from the Price Formation demonstrates the significance of the dome on paleoflow patterns. Exposures in …
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Spatial heterogeneity in isotope and biomarker distributions : insights from the End-Devonian OAE in Western Canada.
… ecosystems, with a particular focus on the Late Devonian period, where similar perturbations of nutrient cycles led to the deposition of organic-rich rock units known as "black shales." Stratigraphic sections of black laminated and burrowed mudrock interspersed with siltstones and …
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Causes and Mechanisms of Remagnetisation in Palaeozoic Sedimentary Rocks - a Multidisciplinary Approach
… and Holy Cross Mountains), where the causes of Late Palaeozoic remagnetisations are yet unclear. The results yield important implications for the processes and mechanisms responsible for the remagnetisations in the areas studied. NE Rhenish Massif: A Late Carboniferous remagnetisation (component …
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PALEOCLIMATE DURING DEPOSITION OF THE GREATER TWILIGHT PARK CONGLOMERATE, UPPER DEVONIAN, SOUTHEAST NEW YORK
… the continent of Laurentia, primarily during the Devonian Period. This created the southward propagating Acadian Orogeny. Formation of the basin and the cratonward-prograding Catskill clastic wedge promoted deposition of the Devonian siliciclastic rocks of the Catskill Mountain region of …
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Monitoring for Enhanced Gas and Liquids Recovery from a CO2 'Huff-and-Puff' Injection Test in a Horizontal Chattanooga Shale Well
… completed in the Chattanooga shale formation, a late Devonian shale, in Morgan County, Tennessee. An extensive monitoring program was implemented during the pre-injection baseline, injection, soaking, and flowback phases of the test. Multiple fluorinated tracers were used to monitor for potential …
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Studying Redox Conditions of Devonian and Neoproterozoic Oceans Using I/ca Proxy From Bulk Carbonate Rocks
… rocks to reconstruct ocean redox changes during Devonian in Laurentia and during Neoproterozoic in South China, to investigate the relationship between ocean redox, paleoenvironmental changes and biotic events. Chapter 1 focuses on a Mid-Devonian core from Appalachian Basin. I/Ca ratios are …
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A Comparative Study of Silicified Rock Reservoir in Shunnan 4 well of Tarim Basin with Hydrothermal Chert Reservoir of Parkland Gas Field in Western Canada Sedimentary Basin
… bladed quartz, overgrowth and quartz cement in later fractures) and three types of calcite cement (CC1-CC3). Geochemical analysis including Si-O isotope analysis on quartz and C-O isotope analysis on calcite cement are processed, together with fluid inclusion studies on both quartz and calcite …
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An Examination of the Mineralogy and Lithology of the Bakken Shale with Implications upon the Bakken Petroleum System, Southeastern Saskatchewan
Late Devonian and Early Mississippian Bakken shales are important source rocks to the oil accumulations in southeastern Saskatchewan. However, to date there is lack of knowledge concerning the mineralogy and lithology of the Bakken shales, which may impact the source effectiveness and heterogeneity …
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Conodonts of the Bakken Formation (Devonian and Mississippian), Williston Basin, North Dakota
… that the Bakken Formation in North Dakota is Late Devonian and Early Mississippian in age. A small conodont fauna from the lower shale includes species of Palmatolepis and Polygnathus and is tentatively considered of the Upper Polygnathus styriacus Zone (Famennian). Species of Siphonodella, …
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