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Showing 1 to 11 of 11 for “"Famennian."”.
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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.
… the Hangenberg are three events occurred in the Famennian. Causes and consequences are 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 …
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Unraveling Paleoenvironmental Stress in the Late Devonian and Mississippian: Insights into Redox Dynamics and Photosynthetic Adaptations Elucidated Through Geochemical Proxies
… and Upper Kellwasser Events as well as Frasnian-Famennian transition on both the local and global scales. Chapter 1 seeks to evaluate the regional distribution of marine deoxygenation within the Appalachian Basin by using a local redox proxy, Fe speciation, with a focus on the record across the …
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Revision of the Upper Devonian in the Central-Southern Appalachian Basin: Biostratigraphy and Lithostratigraphy
… 19 local biozones are described. The Frasnian/Famennian boundary is accurately placed based on occurrences of internationally known index fossils. The Frasnian/Famennian extinction event is recognized and is determined to have two pulses. The local biostratigraphic zonations doubled the …
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Quantifying the Biogeochemical Impact of Land Plant Expansion in the Mid Devonian and Implications in Marine Anoxic Events
… and the two pulses associated with the Frasnian-Famennian (F/F) mass extinction. The episodic expansion of terrestrial plants appears to be tied to variations in regional and global climate, and in the case of the F/F extinction, also to atmospheric changes associated with large scale volcanism. …
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Characterizing ancient chemoclines through the use of pigment biomarkers and sedimentary stable isotope signatures
… associated with the Late Devonian Frasnian-Famennian biotic crisis. The Frasnian-Famennian biotic crisis marked by two distinct intervals known as the Lower and Upper Kellwasser Events that in many locations are associated with deposition of organic-rich shales. Black shales from the …
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Petrology, geochemistry, diagenesis and depositional environment of the Upper Devonian - Lower Carboniferous Exshaw Formation, northwestern Alberta.
The Upper Devonian (Famennian)-Lower Carboniferous (Tournaisian) Exshaw Formation is a thin, laterally extensive organic-rich petroleum source rock. It is one of Canada's most important petroleum source rocks and is a major contributor to the Lower Cretaceous Mannville heavy oil accumulations in …
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Deposition, stratigraphy, provenance, and reservoir characterization of carbonate mudstones: the Three Forks Formation, Williston Basin
… provenance, and reservoir quality of the Famennian Three Forks carbonate mudstones. Depositional environments and lithofacies include the following. Schizohaline, storm dominated intrashelf deposits defined by disturbed claystone, dolomudstone, sandstone, laminated mudstone, and distorted …
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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
… Pennsylvanian. In both Hampshire (Late Devonian, Famennian) and Price Formation (Early Carboniferous, Toumaisian) coal swamps, diversity is so low that only one taxon of plant is present: Rhacophyton ceratangium in the Late Devonian and Lepidodendropsis vandergrachtii in the Early Mississippian. …
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Conodonts of the Bakken Formation (Devonian and Mississippian), Williston Basin, North Dakota
… of the Upper Polygnathus styriacus Zone (Famennian). Species of Siphonodella, Pseudopolygnathus, and Polygnathus dominate the upper shale fauna. Conodonts from the uppermost beds of the upper shale of the Bakken are of the Lower Siphonodella crenulata Zone (Kinderhookian). Conodont …
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Conodont biostratigraphy of the Bakken and lower Lodgepole Formations (Devonian and Mississippian), Williston Basin, North Dakota
… specific conodont biozones.</p> <p>At least one Famennian (Lower Palmatolepis gracilis expansa) and possibly five Kinderhookian (siphonodellid) conodont biozones were recognized in the Bakken and basal Lodgepole Formations. Thirty-eight biostratigraphically useful form-species were used for …
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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 …