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Karel Martínek - One of the best experts on this subject based on the ideXlab platform.
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a review of the middle late pennsylvanian west european regional substages and floral biozones and their correlation to the geological time scale based on new u pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
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A review of the Middle–Late Pennsylvanian west European regional substages and floral biozones, and their correlation to the Geological Time Scale based on new U–Pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
Guzel Sungatullina - One of the best experts on this subject based on the ideXlab platform.
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determination of the bashkirian Moscovian boundary in the volga region via conodont species declinognathodus donetzianus nemirovskaya
Geological Magazine, 2014Co-Authors: Guzel SungatullinaAbstract:The selection of the global biomarker of the lower boundary of the Moscovian stages is one of the pressing issues of Carboniferous stratigraphy. Several solutions are suggested for this problem: Diplognathodus ellesmerensis Bender, Streptognathodus expansus (Igo & Koike) and Idiognathoides postsulcatus Nemirovskaya. The conodont species Declinognathodus donetzianus Nemirovskaya is one of the most prospective. It was detected in the rock sections of west Europe, the Donets Basin, the Moscow Syneclise, south Ural and the Appalachian Basin. The Volga region is also one of the places where Declinognathodus donetzianus Nemirovskaya is often met and this article is dedicated to detailed analysis of this species.
Stanislav Opluštil - One of the best experts on this subject based on the ideXlab platform.
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a review of the middle late pennsylvanian west european regional substages and floral biozones and their correlation to the geological time scale based on new u pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
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A review of the Middle–Late Pennsylvanian west European regional substages and floral biozones, and their correlation to the Geological Time Scale based on new U–Pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
Qiulai Wang - One of the best experts on this subject based on the ideXlab platform.
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integrated biostratigraphy and age assignment for carboniferous successions in the qoltag tectonic belt in eastern tianshan nw china
Journal of Asian Earth Sciences, 2021Co-Authors: Xing Huang, Wei Lin, Xiangdong Wang, Xionghua Zhang, Yue Wang, Tengfei Luan, Qiulai WangAbstract:Abstract In the Qoltag tectonic belt of eastern Tianshan, southwestern Central Asian Orogenic Belt, there are widespread Carboniferous marine volcanic-sedimentary successions. These successions record critical information about the development of the North Tianshan Ocean. To date, ages of them are uncertain, due to the lack of index fossils. In this study, abundant rugose corals, fusulines, and some conodonts were collected that allow us to assign precise ages for the successions. In ascending order, we recognized four rugose coral assemblages, including the Zaphrentites-Meniscophyllum Assemblage, Gangamophyllum-Palaeosmilia-Kueichouphyllum Assemblage, Petalaxis-Koninckophyllum Assemblage and the Ivanovia Assemblage. Four fusuline zones, including the Profusulinella parva-Profusulinella staffellaeformis Zone, Profusulinella wangyui-Eofusulina trianguliformis Zone, Fusulinella-Fusulinella Zone and the Rauserites rossicus Zone were also established. Based on these new fossil assemblages and biozones, age of the sedimentary units in the Qoltag tectonic belt was constrained as following. The Nanbeidagou Formation ranges from Tournaisian to early Visean in age, the Yamansu Formation from early Visean to late Bashkirian, the Shaquanzi Formation from late Bashkirian to middle Moscovian, the Dikaner Formation from Bashkirian to Moscovian, and the Qi’eshan Formation from Bashkirian to as late as early Gzhelian. The updated Carboniferous framework enables the establishment of regional standard and improves the precision of correlation with others. It further provides a sound basis for the future interpretation of tectonic evolution in the southwestern Central Asian Orogenic Belt.
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Early Pennsylvanian conodonts from the Luokun section of Luodian, Guizhou, South China
Palaeoworld, 2017Co-Authors: Qiulai Wang, Tamara I Nemyrovska, Jitao ChenAbstract:Abstract An abundant and taxonomically diverse conodont association was recovered from the Bashkirian strata at the Luokun section, southern Guizhou, South China. Forty-six species and subspecies, which belong to 10 genera, were identified. Seven conodont zones were recognized. They are, in ascending order, the Declinognathodus noduliferus , Idiognathoides sulcatus sulcatus , Idiognathoides sinuatus , Idiognathoides sulcatus parvus , “ Streptognathodus ” expansus M1, “ Streptognathodus ” expansus M2, and Diplognathodus cf. ellesmerensis zones. The base of the Bashkirian in the Luokun section is identified by the first occurrence of Declinognathodus noduliferus . Declinognathodus praenoduliferus and D. cf. bernesgae occur in the underlying beds. The base of the Moscovian can be recognized by the first occurrence of Diplognathodus cf. ellesmerensis , which is one of the most significant markers for the Bashkirian–Moscovian boundary in China. The conodont zonation is compared with that of the Naqing section nearby, as well as with that of the contemporaneous deposits of the South Urals, Donets Basin, North America and other areas.
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carboniferous conodont biostratigraphy of the dianzishang section zhenning guizhou south china
Geological Magazine, 2014Co-Authors: Qiulai Wang, Wei LinAbstract:A preliminary summary of the lower Visean to uppermost Moscovian (Carboniferous) conodont succession and biostratigraphy of the Dianzishang section in Zhenning, Guizhou, South China is presented. Eleven conodont zones, in ascending order, can be recognized: Gnathodus praebilineatus , Gnathodus bilineatus , Lochriea ziegleri , Declinognathodus noduliferus , Neognathodus symmetricus , ‘ Streptognathodus ’ expansus (primitive form), ‘ Streptognathodus ’ expansus , Mesogondolella donbassica – Mesogondolella clarki , Idiognathodus podolskensis , Swadelina fauna and Idiognathodus swadei zones. The first occurrences of Lochriea ziegleri at the base of the Serpukhovian Stage, Declinognathodus noduliferus noduliferus at the base of the Bashkirian Stage and ‘ Streptognathodus ’ expansus at the base of the Moscovian Stage are recognized. The definitions of these stage boundaries, as well as that of the base of the Kasimovian Stage are discussed. Correlations with the Naqing section in South China, Russian and North American sections, as well as other important sections in the world, are considered.
Mark D. Schmitz - One of the best experts on this subject based on the ideXlab platform.
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a review of the middle late pennsylvanian west european regional substages and floral biozones and their correlation to the geological time scale based on new u pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
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A review of the Middle–Late Pennsylvanian west European regional substages and floral biozones, and their correlation to the Geological Time Scale based on new U–Pb ages
Earth-Science Reviews, 2016Co-Authors: Stanislav Opluštil, Mark D. Schmitz, Christopher J. Cleal, Karel MartínekAbstract:Abstract Lower Moscovian (Duckmantian) to lower Asselian ash beds in the continental basins of the central and western Czech Republic have yielded 15 new high-precision U–Pb single crystal zircon CA-ID-TIMS ages. These are used to improve the calibration of the West European regional terrestrial stages and their correlation to the Geological Time Scale. They also allow an improved correlation between the macrofloral biozones that are used for biostratigraphy in the European Pennsylvanian coalfields, the marine biozones on which the global Geological Time Scale was partly established, and the fresh-water and terrestrial faunal biozones. Most of the floral biozones have proved to be essentially isochronous, although the ranges of some individual but stratigraphically important taxa may differ between basins.
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high precision u pb calibration of carboniferous glaciation and climate history paganzo group nw argentina
Geological Society of America Bulletin, 2010Co-Authors: Erik L Gulbranson, Mark D. Schmitz, Carlos O Limarino, Isabel P Montanez, John L Isbell, Sergio A Marenssi, James L CrowleyAbstract:The duration and geographic extent of Carboniferous glacial events in southern Gondwana remain poorly constrained despite recent evidence for a more dynamic glacial history than previously considered. We report 10 high-precision (2! ± <0.1%) U-Pb ages for the Permian-Carboniferous Paganzo Group, NW Argentina, that redefi ne the chronostratigraphy of the late Paleozoic Paganzo and Rio Blanco Basins, and signifi cantly refi ne the timing of glacial events and climate shifts in the western region of southern Gondwana. Radiometric calibration of the Paganzo Group indicates three pulses of Carboniferous glaciation in the mid-Visean, the late Serpukhovian to earliest Bashkirian, and between the latest Bashkirian to early Moscovian. An abrupt shift in depositional style from high-sinuosity single-storied fl uvial deposits and clay-rich paleosols to low-sinuosity multi storied feldspathic fluvial deposits inter calated with eolianites and calcic paleosols is constrained to the latest Moscovian and earliest Kasimovian. These constraints indicate a relatively abrupt climate shift from humid-subhumid to nonseasonal semiarid regional climate conditions that occurred signifi cantly earlier than previously inferred (Early Permian). This period of high-latitude aridity was contemporaneous with a shift to dryland depositional environments and a major vegetation regime shift documented throughout the Pangean paleotropics in the Pennsylvanian.