The Devonian-Carboniferous Boundary around the globe: a complement

Aretz, Markus; Corradini, Carlo; Denayer, Julien

doi:10.1007/s12549-021-00495-y

Cited by 13 publications

(2 citation statements)

References 126 publications

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“…Considering all these features as well as the age constraints, we can correlate the shale intercalation in the topmost Bardo IV section to the worldwide Hangenberg Black Shale (HBS, Fig. 16), they key event in a multi-stage global change (see Pisarzowska et al, 2020;Racki, 2020;Aretz et al, 2021).…”

Section: Oceanic Record Of the Hangenberg Black Shalementioning

confidence: 99%

A waning Saxothuringian Ocean evidenced in the Famennian tephra-bearing siliceous succession of the Bardo Unit (Central Sudetes, SW Poland)

et al. 2022

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A tephra-rich cherty-clayey Famennian succession within the major Brzeźnica olistostrome in the Bardo Mountains, Central Sudetes, SW Poland, preserves a record of the lost ocean later incorporated into the Variscan orogenic belt. Fluctuating but mostly oligotrophic regimes and low primary production levels were influenced by weak upwelling below the perennial oxygen minimum zone, which controlled the interplay between biosiliceous and siliciclastic deposition in the oceanic basin, with episodic oxygen deficiency. The Hangenberg Black Shale has been identified in this oceanic setting based on its characteristics described worldwide (including mercury enrichments). A tectonic uplift of the sediment source area near the Devonian-Carboniferous boundary, recorded in the distinguishing provenance signal of old continental crust, was paired with a global transgression, anoxia, and volcanic episode in an interglacial interval. Assuming paleogeographic affinity with the Bavarian facies of the Saxothuringian terrane, we interpret the allochthonous sediments as part of an accretionary prism that was gravitationally redeposited into the late orogenic basin in front of advancing Variscan nappes. The oceanic basin parental to the Bardo pelagic succession is therefore thought to represent a tract of the waning Saxothuringian Ocean in the Peri-Gondwanan paleogeographic domain that was eventually subducted beneath the Brunovistulian margin of Laurussia. The sediments of the Bardo Ocean basin also include a distal record of Famennian explosive volcanic activity that was likely related to a continental magmatic arc whose remnants are preserved as the Vrbno Group of the East Sudetes.

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Section: Oceanic Record Of the Hangenberg Black Shalementioning

confidence: 99%

A waning Saxothuringian Ocean evidenced in the Famennian tephra-bearing siliceous succession of the Bardo Unit (Central Sudetes, SW Poland)

et al. 2022

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“…Second, the stratigraphic ranges of all bryozoan taxa were compiled from the sources indicated above to compose a database for further quantitative analysis. For this purpose, the regional stratigraphical framework [22,[25][26][27][28] was brought in correspondence to the modern version of the geological time scale [29,43] and, particularly, the stratigraphy of the Devonian-Carboniferous transition [1, [44][45][46][47][48][49]. The presence of bryozoan taxa in the four substages of the Famennian and the two substages of the Tournaisian was established.…”

Section: Palaeontological Informationmentioning

confidence: 99%

Bryozoan Diversity Dynamics at the Devonian–Carboniferous Transition: Evidence from Transcaucasia

Tolokonnikova

Ruban

2022

JMSE

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The Devonian–Carboniferous transition was marked by a series of perturbations in the geological and biological evolution. The palaeontological data from Transcaucasia allowed the bryozoan diversity dynamics on the northern Gondwanan margin (southern periphery of the Palaeo-Tethys Ocean) to be documented at this transition. Taxonomic ranges of 43 species, 26 genera, 19 families, and 4 orders were analysed to reveal changes in the total diversity, the number of appearances, the number of disappearances, and the turnover rates per substages. It is established that the bryozoan diversity was rather high in the beginning and the end of the Famennian, as well as in the Late Tournaisian. It declined significantly in the Middle–Late Famennian and the Early Tournaisian due to the combination of the high number of disappearances and the low number of appearances. The turnovers remained strong, and they peaked in the mid-Famennian. These regionally documented diversity changes match the patterns recorded globally and in Southern Siberia. Hypothetically, the Middle–Late Famennian and Early Tournaisian crises established in Transcaucasia were related to the global events (anoxia and mass extinctions), a series of which weakened the bryozoans’ resistivity to negative external influences.

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Late Devonian–Mississippian conodont biostratigraphy of the Chelcheli section, NE Shahrud (Eastern Alborz, North Iran)

Bahrami

Königshof

Hartkopf‐Fröder

et al. 2021

PalZ

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The Devonian-Carboniferous Boundary around the globe: a complement

Cited by 13 publications

References 126 publications

A waning Saxothuringian Ocean evidenced in the Famennian tephra-bearing siliceous succession of the Bardo Unit (Central Sudetes, SW Poland)

A waning Saxothuringian Ocean evidenced in the Famennian tephra-bearing siliceous succession of the Bardo Unit (Central Sudetes, SW Poland)

Bryozoan Diversity Dynamics at the Devonian–Carboniferous Transition: Evidence from Transcaucasia

Late Devonian–Mississippian conodont biostratigraphy of the Chelcheli section, NE Shahrud (Eastern Alborz, North Iran)

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