Microconchid-dominated cobbles from the Upper Devonian of Russia: Opportunism and dominance in a restricted environment following the Frasnian–Famennian biotic crisis

Zatoń, Michał; Журавлев, А. В.; Rakociński, Michał; Filipiak, Paweł; Borszcz, Tomasz; Krawczyński, Wojciech; Wilson, Mark A.; Sokiran, E V

doi:10.1016/j.palaeo.2014.02.029

Cited by 22 publications

(15 citation statements)

References 46 publications

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“…In some sections, however, the Fr-Fa boundary is coupled with hiatuses, unconformities and distinctive facies changes (e.g. Bratton et al 1999, Alekseev et al 1996, Chen & Tucker 2004, Bond & Wignall 2008, Zatoń et al 2014. Riquier et al (2006) proposed different causes of anoxia in both Kellwasser Events.…”

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confidence: 99%

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

Weiner¹,

Kalvoda²,

Kumpan³

et al. 2017

Bull. Geosci.

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Rapid and profound changes in Earth surface environments and biota across the Frasnian-Famennian (Fr-Fa) boundary are well known and related to one of the five most severe mass extinction events in Earth history. Here, we present sedimentological, biostratigraphical, petrophysical (gamma-ray spectrometry, magnetic susceptibility) and geochemical (X-ray fluorescence) data from environmentally distinct sections in the Moravian Karst (Czech Republic) and compare them with the Steinbruch Schmidt section in the Kellerwald (Rheinisches Schiefergebirge, Germany). Both areas were located at the southern margin of Laurussia. The studied sections span the interval from the Lower or Upper rhenana to the Palmatolepis minuta minuta or younger conodont zones and the foraminiferal Eonodosaria evlanensis Zone and Eonodosaria evlanensis-Quasiendothyra communis Interzone including high resolution biozonation of the Fr-Fa boundary interval. In the Moravian Karst pure limestone facies of an inclined carbonate ramp reflect the worldwide trend in the widespread occurrence of calcimicrobes during upper Frasnian and lower Famennian. Geochemical and petrophysical data show a decrease in grain size of the siliciclastic supply and carbonate productivity in the Kellwasser Event intervals probably due to a deepening and correlate with maximum flooding surfaces and highstand system tracts in the Steinbruch Schmidt. Certain differences in some geochemical proxies between the Moravian Karst and Steinbruch Schmidt are due to lower carbonate dilution of the latter. Significant Zr, TiO 2 , Mn or Fe 2 O 3 enrichments may indicate the influence of volcanic sources in the studied Moravian Karst Fr-Fa sections.

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confidence: 99%

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

Weiner¹,

Kalvoda²,

Kumpan³

et al. 2017

Bull. Geosci.

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“…This study is based on new and published lithological and palaeontological data from the East European Platform, northern Urals, PaiKhoi, the East Siberian Platform, and northeast Siberia (Pershina & Tsyganko 1980;Alekseeva et al 1996;Yudina et al 2002;Yolkin et al 2006;Ovnatanova & Kononova 2008;Zhuravlev 2008Zhuravlev , 2016Gagiev 2009;Yazikov et al 2013;Zatoń et al 2014;Zhuravlev et al 2015;Ovnatanova et al 2017). The new data comprises lithological and palaeontological (brachiopods and conodonts) information from the sections of the East European Platform (two sections) and PaiKhoi (two sections).…”

Section: Methodsmentioning

confidence: 99%

Frasnian-Famennian (Upper Devonian) transition in the northern hemisphere (NE Laurussia and NE Siberia) - an overview

Журавлев¹,

Sokiran²

2020

Bull. Geosci.

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“…During the Devonian, encrusting organisms were very common due to the presence of a variety of suitable substrates, especially in the form of abundant and diverse corals and brachiopods (e.g., Alvarez and Taylor 1987;Baird and Brett 1983;Bordeaux and Brett 1990;Zapalski 2005;Schneider 2013;Zatoń et al 2015Zatoń et al , 2017Zatoń et al , 2018, as well as lithic hardgrounds and cobbles (e.g., Baird 1976Baird , 1981Zatoń et al 2014). Compared with Mesozoic encrusting communities, those in the Palaeozoic, exemplified by Devonian assemblages, differed much in their taxonomic composition.…”

Section: Introductionmentioning

confidence: 99%

Enigmatic encrusting fossils from the Upper Devonian of Russia: probable Rothpletzella microproblematica preserved in three dimensions

Zatoń

Jarochowska

2018

Historical Biology

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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 divide dichotomously at different points in their development. The organisms preserved grew horizontally on shelly substrates. Comparisons with similar fossils known from the literature indicate that they do not represent any animal taxon commonly encrusting hard substrates. Instead, the morphology, organization and growth mode of these fossils are most similar to microfossils known under the name Rothpletzella, which so far have only been known from thin sections. Rothpletzella is a problematicum for which algal affinities have been proposed. The preserved branches of the fossils described here are too large for cyanobacterial cells. Their large size suggests their placement, along with other described Rothpletzella fossils, within the green algae order Bryopsidales. It is suggested that originally, these organisms 2 possessed thalli encased within a thin, delicate calcified sheath. After burial the thalli underwent pyritization via sulphate reduction mediated by bacterial activity within low pH, dysoxic microenvironment, and their sheath dissolved. As three-dimensionally preserved, these algae provide a new, previously unrecognized, component within the Devonian encrusting communities.

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Microconchid-dominated cobbles from the Upper Devonian of Russia: Opportunism and dominance in a restricted environment following the Frasnian–Famennian biotic crisis

Cited by 22 publications

References 46 publications

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

Frasnian-Famennian (Upper Devonian) transition in the northern hemisphere (NE Laurussia and NE Siberia) - an overview

Enigmatic encrusting fossils from the Upper Devonian of Russia: probable Rothpletzella microproblematica preserved in three dimensions

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