Results 121 to 130 of about 455 (173)

Recurring marine phosphorus spikes during major palaeozoic mass extinctions and climate change. [PDF]

Nat Commun
Dodd MS, Li C, Zhang Z, Sadekov AY, Desrochers A, Hints O, Yan D, Yang X, George AD, Elrick M, White D, Qie W, Chen B, Merdith AS, Mills BJW.   +14 more
europepmc   +1 more source

Field trip 1: Givetian and Frasnian of Southern Belgium

, 2011
Boulvain, Frédéric, Coen-Aubert, Marie, Da Silva, Anne-Christine, Kershaw, Stephen, Tourneur, Francis, Denayer, Julien, Mottequin, Bernard, Poty, Edouard   +7 more
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Frasnian coral- stromatoporoid-microbial atolls, Belgium

, 2007
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Biochemostratigraphy of the Upper Frasnian in the Namur–Dinant Basin, Belgium: Implications for a global Frasnian–Famennian pre-event [PDF]

Palaeogeography, Palaeoclimatology, Palaeoecology, 2012
The Upper Frasnian sequence of the Namur–Dinant Basin in southern Belgium consists of mixed siliclastic–carbonate succession of a ramp setting, where the sequence spans the rhenana–linguiformis conodont zones. Earlier studies investigated the chemostratigraphic variations during the Frasnian–Famennian event, but little has been yet known about the ...
Bernard Mottequin, Edouard Poty
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Anoxic events in the late Frasnian—Causes of the Frasnian-Famennian faunal crisis?

Geology, 1993
Carbon isotope data collected from five Frasnian-Famennian boundary sections in central Europe show two positive δ 13 C excursions in the late Frasnian (∼367 Ma). Both anomalies coincided with the deposition of the bituminous lower and upper Kellwasser horizons. The carbon isotope patterns indicate two phases of enhanced burial and subsequent recycling
Michael M. Joachimski, Werner Buggisch
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Late Frasnian phillipsastreid biostromes in Belgium

Geological Society, London, Special Publications, 2007
Abstract In the Belgian Namur-Dinant Basin the boundary between the Lustin Formation and the Aisemont Formation (in the Lower rhenana conodont Biozone) corresponds to a fall followed by a rise in sea level, leading to the first recorded late Frasnian coral crisis.
Edouard Poty, Emmanuel Chevalier
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On Frasnian ammonoids of the New Siberian Islands

Paleontological Journal, 2009
Ammonoids from the basal beds of the Nerpalakh Formation (Lower Frasnian) of Belkovsky Island (New Siberian Archipelago) are systematically studied. Taxonomically, the assemblage studied (Manticoceras insulare sp. nov., Tornoceras typum (Sandberger, 1851), and T.
S. V. Nikolaeva, A. B. Kuzmichev, V. A. Aristov   +2 more
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Magnetostratigraphy susceptibility of the Frasnian/Famennian boundary

Palaeogeography, Palaeoclimatology, Palaeoecology, 2002
Magnetosusceptibility event and cyclostratigraphy (MSEC) is used to establish a non-polarity-based magnetostratigraphy susceptibility (MSS) between the stratotype region for the Frasnian/Famennian (F/F) boundary sequence in the Montagne Noire of southern France, the eastern Rheinisches Schiefergebirge of Germany, Belgium, the eastern Anti-Atlas of ...
Rex E Crick, Brooks B Ellwood, Raimund Feist, Ahmed El Hassani, Eberhard Schindler, Roland Dreesen, D.Jeffrey Over, Catherine Girard   +7 more
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The conodont biofacies model of shallow paleoenvironments in Frasnian (Late Devonian)

Moscow University Bulletin. Series 4. Geology, 2023
The article considers various criteria of the conodont biofacies distinguishing, and principles of conodont paleoecological models reconstructing. The proposed conodont biofacies model is based on conodont distribution in the Frasnian (Upper Devonian) of the Voronezh anteclise (Central regions of Russian Platform).
V. M. Nazarova, E. M. Kirilishina, L. I. Kononova, E. V. Karpova, S. S. Demyankov   +4 more
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Frasnian-Famennian extinctions

1982
Extinctions are continuous throughout the Phanerozoic. Although a single natural phenomenon brought about by environmental change at any scale, they may be conveniently divided into two classes: background extinction and mass extinction (Raup and Sepkoski, 1982).
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