Givetian (Middle Devonian) historical bio- and chronostratigraphical subdivision based on conodonts

Liao, Jau-Chyn; Valenzuela-Ríos, José Ignacio

doi:10.1111/let.12192

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…The first I. difficilis from Bed 11, from ca. 4.5 m higher, may even indicate a basal middle Givetian age (see icriodid zonation of Bultynck 1987 and the review by Liao and Valenzuela-Ríos 2017). However, there is increasing evidence from Morocco, that close relatives of I. difficilis have a slightly Becker et al 2020Becker et al , 2021c.…”

Section: Geological Setting Litho- and Biostratigraphymentioning

confidence: 98%

The initial phase of the Hönne Valley Reef at Binolen (northern Rhenish Massif, Middle Devonian)

Löw

Söte

Becker

et al. 2022

Palaeobio Palaeoenv

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The Hagen-Balve Reef Complex of the northern Rhenish Massif, Germany, is one of the best examples for the globally widespread Givetian to Frasnian reefs. At its eastern end, in the Hönne Valley, it reaches up to 1000 metres in thickness. In general, there is limited knowledge concerning the faunas and palaeoecology of Rhenish initial reef phases. A unique section at Binolen exposes the sharp boundary between the underlying, siliciclastic Upper Honsel Formation and the lower part of the reefal Hagen-Balve Formation. A ca. 14 m thick succession is assigned to the new Binolen Member and investigated in terms of carbonate microfacies, micro-, and macrofaunas. Seven microfacies types (MF) characterise a crinoidal coral-stromatoporoid garden setting (MF-2 to MF-6) or allobiostrome of an initial open platform turning upsection into a coral parabiostrome (MF-7/8). The base of the Asbeck Member is locally defined by the appearance of back-reef facies types, such as fenestral limestones (MF-9), which indicate the transformation into a bioherm. Low-diversity conodont faunas prove an influx of open shelf organisms for the Binolen Member and suggest a lower Givetian age (probably Polygnathus timorensis Zone). There are two new Givetian conodont biofacies types characteristic for open biostrome settings, the Bipennatus Biofacies and a Simple Cone Biofacies. Thin sections reveal over 40 different reef builders (rugose and tabulate corals, stromatoporoids, and chaetetid sponges). Around 4200 microfossils from conodont residues consist of agglutinating foraminifers, calcareous sponge spicules (e.g. Heteractinida), scolecodonts, echinoderms (mostly crinoid ossicles and holothurian sclerites), pyritised benthic ostracods, assumed calcified moulds of chitinozoans, subordinate microvertebrates, and other groups. They were analysed quantitatively in order to document changing distribution patterns and environments through time. We distinguish six microfossil-based biofacies types (BF), namely the Ostracoda Biofacies (BF-O), Foraminifera Biofacies (BF-F), Scolecodont Biofacies (BF-S), Chitinozoa Biofacies (BF-C), Porifera-Scolecodont Biofacies (BF-PS), and Porifera-Echinodermata Biofacies (BF-PE). Microfacies and microfossil assemblages led to a reconstruction of the local facies development, consisting of seven successive depophases with further subdivisions. At the base, the sudden termination of siliciclastic influx enabled a proliferation of reef builders and microfaunas (Depophase I), followed by a longer deepening phase characterised by exclusive bioclastic wackestones (Depophase II). Depophase III is a short regressive phase with crinoidal coral-stromatoporoid floatstones. Depophase IV is characterised by fluctuations in facies and relative sea-level, which results in three subphases. Depophase V resembles Depophase III, but with argillaceous interbeds and more abundant scolecodonts. It is followed by an interval with coral-stromatoporoid rudstones, which grade into coral-dominated bafflestones of an (auto)parabiostrome (both Depophase VI). Depophase VII represent the back-reef facies, including fenestral pack-bindstones of the basal Asbeck Member. The systematic analysis of reefal microfaunas represents pioneer work that should be tested and expanded to other reefs of the Rhenish Massif and beyond.

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Section: Geological Setting Litho- and Biostratigraphymentioning

confidence: 98%

The initial phase of the Hönne Valley Reef at Binolen (northern Rhenish Massif, Middle Devonian)

Löw

Söte

Becker

et al. 2022

Palaeobio Palaeoenv

View full text Add to dashboard Cite

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“…Conodonts proved to be fundamental also in the Devonian for the threefold sub‐division of the Givetian into the Lower, Middle and Upper Givetian sub‐stages. Liao & Valenzuela‐Ríos (this issue) revise this historical sub‐division which was accomplished by the conceptual evolution from a stage based on almost a unique zone to one with ten zones, mostly based on pelagic conodont taxa. An alternative biostratigraphical sub‐division for the Lower and Middle Givetian based on shallow‐water faunas is discussed and correlated with the standard one.…”

Section: Papers In This Issuementioning

confidence: 99%

The Contribution of Fossils to Chronostratigraphy, 150 Years after Albert Oppel

Balini

Ferretti

Finney

et al. 2017

LET

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The 150th anniversary of the death of Albert Oppel (1831–65) provided the opportunity to celebrate this outstanding stratigrapher with a Thematic Issue dedicated to the importance of fossils for dating and correlating of sedimentary rocks. In this issue, we analyse Oppel's significant contribution to modern chronostratigraphy, before exploring the Phanerozoic through all its major fossil groups, to verify if fossils are still able to make a significant contribution to chronostratigraphy. The extraordinary merit of Oppel's work has been the demonstration that fossils can be used to sub‐divide sedimentary sequences into zones, which in turn might be organized in higher chronostratigraphical units. The zone for Oppel is characterized by the distinctive fossil content, and his view strongly influenced the development of the standard chronostratigraphical scale for about one century, until the introduction, in the 1950s, of the log‐based range chart as the common practice to study the fossil record of sedimentary successions. This approach forced the stratigraphers to shift the focus from the fossil content of the zones to their boundaries. This new view allowed for the introduction of new kind of zones with precisely defined boundaries based on bioevents and to the decline of the Oppel Zone. This turning point in the history of chronostratigraphy was fuelled by the International Commission on Stratigraphy programme of definition of the units of the International Chronostratigraphic Chart based on the boundary stratotype and point (GSSP) concept, which started in 1973.

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Litho-, bio-, and sequence stratigraphy of the Boyle-Portwood Succession (Middle Devonian, Central Kentucky, USA)

Brett

Zambito

Baird

et al. 2018

Palaeobio Palaeoenv

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Givetian (Middle Devonian) historical bio- and chronostratigraphical subdivision based on conodonts

Cited by 5 publications

References 11 publications

The initial phase of the Hönne Valley Reef at Binolen (northern Rhenish Massif, Middle Devonian)

The initial phase of the Hönne Valley Reef at Binolen (northern Rhenish Massif, Middle Devonian)

The Contribution of Fossils to Chronostratigraphy, 150 Years after Albert Oppel

Litho-, bio-, and sequence stratigraphy of the Boyle-Portwood Succession (Middle Devonian, Central Kentucky, USA)

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