Event-Stratigraphy of the Belgian Famennian (Uppermost Devonian, Ardennes Shelf)

Dreesen, Roland

doi:10.1007/978-3-663-01886-5_3

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…praesulcata Zone and was likely associated with ice sheet melting in the Southern Hemisphere. However, Dreesen et al (1988) and Feist et al (2000) argued that a sharp regression occurred at the base of the HBS interval and was followed by a gradual transgression until the top of the Upper Si. praesulcata Zone.…”

Section: Geological Backgroundmentioning

confidence: 99%

Isotopic evidence of environmental changes during the Devonian–Carboniferous transition in South China and its implications for the biotic crisis

Cao

Wang

et al. 2023

Geobiology

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The Devonian–Carboniferous (D–C) transition coincides with the Hangenberg Crisis, carbon isotope anomalies, and the enhanced preservation of organic matter associated with marine redox fluctuations. The proposed driving factors for the biotic extinction include variations in the eustatic sea level, paleoclimate fluctuation, climatic conditions, redox conditions, and the configuration of ocean basins. To investigate this phenomenon and obtain information on the paleo‐ocean environment of different depositional facies, we studied a shallow‐water carbonate section developed in the periplatform slope facies on the southern margin of South China, which includes a well‐preserved succession spanning the D–C boundary. The integrated chemostratigraphic trends reveal distinct excursions in the isotopic compositions of bulk nitrogen, carbonate carbon, organic carbon, and total sulfur. A distinct negative δ15N excursion (~−3.1‰) is recorded throughout the Middle Si. praesulcata Zone and the Upper Si. praesulcata Zone, when the Hangenberg mass extinction occurred. We attribute the nitrogen cycle anomaly to enhanced microbial nitrogen fixation, which was likely a consequence of intensified seawater anoxia associated with increased denitrification, as well as upwelling of anoxic ammonium‐bearing waters. Negative excursions in the δ13Ccarb and δ13Corg values were identified in the Middle Si. praesulcata Zone and likely resulted from intense deep ocean upwelling that amplified nutrient fluxes and delivered 13C‐depleted anoxic water masses. Decreased δ34S values during the Middle Si. praesulcata Zone suggests an increasing contribution of water‐column sulfate reduction under euxinic conditions. Contributions of organic matter produced by anaerobic metabolisms to the deposition of shallow carbonate in the Upper Si. praesulcata Zone is recorded by the nadir of δ13Corg values associated with maximal △13C. The integrated δ15N‐δ13C‐δ34S data suggest that significant ocean‐redox variation was recorded in South China during the D–C transition; and that this prominent fluctuation was likely associated with intense upwelling of deep anoxic waters. The temporal synchrony between the development of euxinia/anoxia and the Hangenberg Event indicates that the redox oscillation was a key factor triggering manifestations of the biodiversity crisis.

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Section: Geological Backgroundmentioning

confidence: 99%

Isotopic evidence of environmental changes during the Devonian–Carboniferous transition in South China and its implications for the biotic crisis

Cao

Wang

et al. 2023

Geobiology

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“…As for causes of the anoxic KW sediments and the KW Event itself, the following assumptions have been made: resu,lt of an asteroid impact (McLaren, 1970;Geldsetzer et aI., 1987;Goodfellow et aI., 1988;Sandberg et aI., 1988a, b;Claeys et aI., 1992;McGhee, 1994[in contrast to, e.g., McGhee, 1989McGhee et aI., 1984]; Oliver and Pedder, 1994); increase in temperature ( Thomson and Newton, 1988); decrease in temperature (Wilde andBerry, 1984, 1986;Copper, 1986;Kalvoda, 1986); general sea-level fluctuation (Johnson et aI., 1985;House, 1985;Oliver, 1980;, especially regression (Johnson et aI., 1985(Johnson et aI., , 1986Dreesen, 1987;Ji, 1988;Morrow and Geldsetzer, 1988;Sandberg et aI., 1988a, b); rise of the anoxic water masses or/and oceanic overturn (Wilde andBerry, 1984, 1988;Walliser, 1986b;Walliser et aI., 1988;. Of course, some of the authors cited prefer a combination of factors, but they either emphasize the mentioned cause or take it as the ultimate cause.…”

Section: Published Assumptions On the Causationmentioning

confidence: 99%

Global Events and Event Stratigraphy in the Phanerozoic

Walliser¹

1996

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“…Precise lithostratigraphical and biostratigraphical analyses (e.g. Conil and Lys 1980;Steenwinkel 1984Steenwinkel , 1990Dreesen 1987;Dreesen et al 1993) show that the Devonian/Carboniferous boundary interval is represented by condensed sedimentation or a hiatus and lack of indicative fauna and¯ora. Thus, intra-and interregional correlation remains uncertain (Paproth 1964;Conil et al 1986;).…”

Section: Continental Equivalentsmentioning

confidence: 99%

Late Famennian gastropoda from south‐west England

Amler¹,

Heidelberger²

2003

Palaeontology

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ABSTRACT. The gastropod fauna of the Upper Devonian Baggy and Pilton formations in south-west England is revised and includes some 30 taxa. The topmost part of the Upper Famennian succession in Devon is represented by clastic near-shore and shallow shelf sediments, indicating a short-term transgressive phase (`Strunian Transgression'). The sequence yields a highly diverse fauna dominated by brachiopods and ostracodes, locally supplemented by crinoids, bryozoans, trilobites and molluscs. The taxa`Patellostium' britannicum sp. nov., Angyomphalus (Angyomphalus) junius sp. nov. and Dictyotomaria eurocapillaria sp. nov. are erected; a junior homonym is replaced by Macrochilina? piltonensis nom. nov. The gastropod fauna displays an independent character, where latest Devonian faunal elements overlap with Late Palaeozoic taxa expressing a transition similar to that of the bivalves, brachiopods, echinoderms and corals, without a sharp faunal break at the Devonian/Carboniferous boundary. Apart from the Caenogastropoda, all subclasses of gastropods are represented. Members of the bellerophontoids, pleurotomarioids and loxonematoids are most abundant, followed by murchisonioids, naticimorphs, euomphalomorphs and platyceratoids. The various gastropod groups represent different ecological demands and trophic categories, and together with the accompanying fauna indicate that nearly all habitats and niches were occupied in the shallow South Laurussian Shelf. A M O N G fossil associations from the middle and upper Palaeozoic, latest Devonian (Late Famennian) faunas worldwide have not attracted special attention as they are mainly scarce, badly preserved and not well understood, although most of them have been known for over 100 years. Only those localities important for establishing the Devonian/Carboniferous boundary have been intensively sampled and studied in detail.Some ten years ago, an interdisciplinary research project was initiated by one of us (MRWA) dealing with the study of biofacies evolution and palaeobiodiversity in siliciclastic shelf regions before and after evolutionary turning-points. The selected study area was the southern margin of Laurussia during the Devonian and early Carboniferous because sedimentary rocks of that age and facies are widely distributed geographically and palaeogeographically from eastern North America across the British Isles and Belgium as far as the Russian Platform. The idea for this study arose from the inadequate knowledge about the palaeontology of siliciclastic and mixed siliciclastic-carbonate shelf areas, although they display good preservation potential.The multidisciplinary studies of invertebrate faunas are now leading to a more detailed picture of the bio-and lithofacies evolution, palaeoecology, biogeography, palaeoclimatology and small-scale palaeogeography of the South Laurussian Shelf. Within the scope of the project we selected several topics for analysis, one of which being the study of the fauna, stratigraphy and biofacies of the Pilton-Condroz Shelf (from south-west ...

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Event-Stratigraphy of the Belgian Famennian (Uppermost Devonian, Ardennes Shelf)

Cited by 9 publications

References 4 publications

Isotopic evidence of environmental changes during the Devonian–Carboniferous transition in South China and its implications for the biotic crisis

Isotopic evidence of environmental changes during the Devonian–Carboniferous transition in South China and its implications for the biotic crisis

Global Events and Event Stratigraphy in the Phanerozoic

Late Famennian gastropoda from south‐west England

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