Diagenetic and geochemical studies of the Buchan Formation (Upper Devonian) in the Central North Sea
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DOI: 10.1007/s12182-018-0232-3
Abstract: The Upper Devonian Buchan Formation reservoirs in the UK Central North Sea are litharenite/sublitharenite and were deposited in fluvial–aeolian settings. The grain-coating clays in the aeolian sandstones have effectively inhibited quartz overgrowth. Hence, the reduction… read more here.
Keywords: north sea; upper devonian; formation; buchan formation ... See more keywords
Inverse correlation between the molybdenum and uranium isotope compositions of Upper Devonian black shales caused by changes in local depositional conditions rather than global ocean redox variations
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DOI: 10.1016/j.gca.2020.01.026
Abstract: Abstract Coupled Mo-U isotope data from the Upper Devonian Kettle Point Formation (Ontario, Canada) provide a cautionary tale regarding interpretation of global ocean redox conditions using data from euxinic black shales. In the Gore of… read more here.
Keywords: global ocean; isotope; black shales; upper devonian ... See more keywords
Astronomical time calibration of the Upper Devonian Lali section, South China
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DOI: 10.1016/j.gloplacha.2020.103267
Abstract: Abstract The Late Devonian Period was a critical geological interval, affected by numerous significant global bio- and environmental events, including the Kellwasser, annulata and Hangenberg events, and a major climate transition leading to the Carboniferous… read more here.
Keywords: lali section; south china; time; upper devonian ... See more keywords
Enigmatic encrusting fossils from the Upper Devonian of Russia: probable Rothpletzella microproblematica preserved in three dimensions
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DOI: 10.1080/08912963.2018.1539972
Abstract: ABSTRACT Intriguing microfossils encrusting certain Upper Devonian brachiopod shells from the Central Devonian Field, Russia, are reported for the first time. The fossils are pyritized, have fan-shaped morphologies and are formed by tightly-packed branches which… read more here.
Keywords: russia; fossils upper; upper devonian; encrusting fossils ... See more keywords
Organic matter in Upper Devonian deposits of the Chernyshev Ridge
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DOI: 10.1134/s0016702917060027
Abstract: The study provides the first data on organic matter from Upper Devonian deposits of the Shar’yu River section (Chernyshev Ridge, Northern Urals). Oil shales from the Middle and Middle–Upper Domanik intervals and carbonaceous shales from… read more here.
Keywords: matter; chernyshev ridge; upper devonian; matter upper ... See more keywords
First Finds of Elliptoglossa Cooper (Brachiopoda, Lingulida) in the Upper Devonian of the Volga–Ural Region; Microstructure of the Protegular and Adult Shell Regions
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DOI: 10.1134/s0031030120040127
Abstract: Elliptoglossa Cooper, 1956 is reported for the first time from the Frasnian, Upper Devonian of the Volga–Ural region. A new species E. kononovae sp. nov. is described. The microstructure of the inner surfaces of the… read more here.
Keywords: volga ural; shell; microstructure; devonian volga ... See more keywords
The cranial endocast of the Upper Devonian dipnoan ‘Chirodipterus’ australis
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DOI: 10.7717/peerj.5148
Abstract: One of the first endocasts of a dipnoan (lungfish) to be realised was that of the Upper Devonian taxon Chirodipterus australis. This early interpretation was based on observations of the shape of the cranial cavity… read more here.
Keywords: chirodipterus australis; devonian dipnoan; endocast; upper devonian ... See more keywords