Environmental changes close to the Lower–Middle Devonian boundary; the Basal Choteč Event in the Prague Basin (Czech Republic)

Vodrážková, Stanislava; Frýda, Jiří; Suttner, Thomas J.; Koptíková, Leona; Tonarová, Petra

doi:10.1007/s10347-012-0300-x

Cited by 30 publications

(27 citation statements)

References 51 publications

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“…In addition, the known ontogenetic data indicate that length proportions of most plates were constrained in different growth stages despite of allometry in other directions (e.g. Werdelin & Long 1986, Cloutier 2010. The length of the skull roof of A. rufus specimen Lc 125 based only on the size of the fragment of the C plate is at least 45 cm.…”

Section: Antineosteus Rufus Sp Nov Figures 3-6mentioning

confidence: 99%

“…It comprises reddish and grey bioclastic (mainly crinoidal) and micritic, mostly well-bedded limestones with common stromatactis structures (e.g. Havlíček & Kukal 1990; for microfacies and some other characteristics see Dieken 1996, Koptíková 2011and Vodrážková et al 2013; the stromatactis structures were studied in detail by Kukal 1972, recently by Dieken 1996, Hladil 2005and Hladil et al 2006, its thickness is 20-30 m. Coarser detritus dominates both the lowest and uppermost parts of the sequence (Chlupáč et al 1979, Chlupáč 1998, Koptíková 2011. The sediments were deposited on the weathered and corroded surface of the Koněprusy Reef, represented by the Koně-prusy Limestone (e.g.…”

Section: Geological and Palaeontological Settingsmentioning

confidence: 99%

“…68), covering the former reef flat and lagoon of this submerging "dead" reef after a short gap from the early to mid Emsian. The Suchomasty Limestone reflects a shallow, purely marine environment with a high level of turbulence and rapid changes between low and high-energy stages of the current intensity (Chlupáč et al 1979, Chlupáč 1998, Havlíček & Kukal 1990) but probably below the storm-wave (Vodrážková et al 2013). • A -location of Devonian sediments (black) in the central part of the Bohemian Massif (grey shaded) on the territory of the Czech Republic.…”

Section: Geological and Palaeontological Settingsmentioning

confidence: 99%

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The largest Lower Devonian placoderm - Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)

Vaškaninová¹,

Kraft²

2014

Bull. Geosci.

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Antineosteus rufus sp. nov. from the upper Emsian of the Czech Republic is described based on two fragments of large dermal plates discovered in the Suchomasty Limestone. The original length of the animal is inferred to have exceeded that of Tityosteus rieversae -the largest Lower Devonian placoderm recorded so far. The occurrence of A. rufus in the Prague Basin is consistent with other giant homostiids in several areas. These animals were apparently adapted to plankton-feeding, although they appeared in the conditions of collapsed diversity of the planktic communities during the "Devonian Nekton Revolution". This successful feeding strategy made them the first vertebrates occupying the nutrient-rich ecospace producing the largest animals up to the present. •

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Section: Antineosteus Rufus Sp Nov Figures 3-6mentioning

confidence: 99%

Section: Geological and Palaeontological Settingsmentioning

confidence: 99%

Section: Geological and Palaeontological Settingsmentioning

confidence: 99%

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The largest Lower Devonian placoderm - Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)

Vaškaninová¹,

Kraft²

2014

Bull. Geosci.

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“…The BCE represents a deepening episode with distinctive facies and faunal changes, which is placed in the time interval corresponding to the Polygnathus partitus and Polygnathus costatus biozones (Vodrážková et al, 2013). At the BCE turn- Keller, 2006).…”

Section: Basal Choteč Eventmentioning

confidence: 99%

From carbonate platform to euxinic sea – the collapse of an Early/Middle Devonian reef, Cantabrian Mountains (Spain)

Loevezijn¹,

Raven

2017

Geologos

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The Santa Lucía Formation represents the major phase in Devonian reef development of the Cantabrian Zone (Cantabrian Mountains, northwest Spain). In the present study the transition from the carbonate platform deposits of the Santa Lucía Formation to the overlying euxinic basinal deposits of the Huergas Formation is described. These transitional strata are connected to the Basal Choteč Event and represent a condensed sedimentation of micritic dark-grey and black limestones with an upward increase of dark shale intercalations with iron mineralisation surfaces and storm-induced brachiopod coquinas. The transitional beds are grouped into a new unit, the Cabornera Bed, which consists of limestone, limestone-shale and shale facies associations, representing a sediment-starved euxinic offshore area just below the storm wave base. Four stages in reef decline can be recognised: a reef stage, an oxygen-depleted, nutrient-rich stage, a siliciclastic-influx stage and a pelagic-siliciclastic stage. Additional geochemical and geophysical investigations are needed to verify the results presented herein.

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“…Volcanic activity within this member is documented in the vicinity of Chýnice and Choteč (Fiala 1946, Svoboda & Prantl 1948. Further detailed information on their geology and faunas can be found in Svoboda & Prantl (1947-1951, Chlupáč (1959Chlupáč ( , 1998, Chlupáč et al (1998), andVodrážková et al (2012). The "Nad tratí" quarry section at Praha-Hlubočepy was selected as the lectostratotype of this lithostratigraphic unit (Chlupáč 1959(Chlupáč , 1981.…”

Section: Tøebotov Limestonementioning

confidence: 99%

High-resolution tentaculite biostratigraphy and facies development across the Early Devonian Daleje Event in the Barrandian (Bohemia): implications for global Emsian stratigraphy

Ferrová¹,

Frýda²,

Lukeš³

2012

Bull. Geosci.

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The long-term activities of the International Subcommission on Devonian Stratigraphy have been focused on the division of the Emsian into two new substages. The different stratigraphic levels, close to the Daleje Event, have mostly been discussed as their boundary. The latter event was first recognized in the Barrandian and defined as a bioevent, connected with a pronounced transgression. Its present conception has been inferred from studies of its appearance in deeper environments, with deposition of the calcareous Daleje Shale. We analysed its appearance in shallower environments, with predominantly carbonate sedimentation, using precise qualitative and quantitative biostratigraphic, paleoecological, and sedimentological methods. Our data revealed that the mid-Emsian had a more complex transgression-regression history than previously described. Evaluation of the stratigraphic distribution of more than 1250 newly collected dacryoconarid shells has resulted in the proposal of a new tentaculite biozonation, providing a much higher stratigraphic resolution than the existing biozonations, which are based on goniatites and conodonts. Quantitative analysis of the newly gathered paleoecological data suggests a distinct faunal turnover at the level of the first occurrence of the dacryoconarid tentaculite Nowakia elegans. In addition, our study revealed that the Daleje transgression (and thus the Daleje Event) started at the same time, and that it was preceded by a distinct regression. For these reasons, we propose the first occurrence of the worldwide and easily determinable dacryoconarid Nowakia elegans as a biostratigraphic indicator of the boundary level for the new Emsian substages.

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Environmental changes close to the Lower–Middle Devonian boundary; the Basal Choteč Event in the Prague Basin (Czech Republic)

Cited by 30 publications

References 51 publications

The largest Lower Devonian placoderm - Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)

The largest Lower Devonian placoderm - Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)

From carbonate platform to euxinic sea – the collapse of an Early/Middle Devonian reef, Cantabrian Mountains (Spain)

High-resolution tentaculite biostratigraphy and facies development across the Early Devonian Daleje Event in the Barrandian (Bohemia): implications for global Emsian stratigraphy

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