Biotic, geochemical and environmental changes through the early Sheinwoodian (Wenlock, Silurian) carbon isotope excursion (ESCIE), Buttington Quarry, Wales

Loydell, David K.; Large, Ross R.

doi:10.1016/j.palaeo.2018.10.028

Cited by 9 publications

(4 citation statements)

References 76 publications

(137 reference statements)

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“…Recent studies proposed new evidence for anoxia or euxinia associated with the excursion in multiple basins [89][90][91], but no indication of marine anoxia has been observed in the shallow-water deposits examined here. Furthermore, basinward mudstonedominated sections in the adjacent Welsh Basin, exposing the Trewern Brook Mudstone Formation in Buttington Quarry, indicated an early Sheinwoodian δ 13 C carb development consistent with the trend proposed here but also reported no indication of persistent anoxia [92], suggesting that more complex changes in seawater geochemistry were associated with the early Sheinwoodian CIE.…”

Section: Depositional Environment Of the Dolyhir And Nash Scarsupporting

confidence: 76%

The Silurian Transgression of a Palaeoshoreline: The Area between Old Radnor and Presteigne, Welsh Borderlands

et al. 2021

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Quarries between Old Radnor and Presteigne, Welsh Borderlands, expose a Silurian nearshore succession, which onlaps a rocky palaeotopography of the Neoproterozoic basement that had been uplifted along the Church Stretton Fault Zone. The succession documents the Aeronian to Sheinwoodian transgression of an island or islands, with the following sequence of events: deposition of shallow marine sandstones (Folly Sandstone Formation), regional uplift, preservation of a rocky shoreline and associated deposits (Dolyhir Rudite Member), deposition of limestones characterized by a profusion of coralline algae and the abundant remains of reefs (Dolyhir and Nash Scar Limestone Formation), and finally deposition of trilobitic silty mudstones (basal Coalbrookdale Formation). Facies analysis, carbon isotope (δ13Ccarb) values, sequence stratigraphy, and collections of bryozoans, conodonts, thelodonts, and trilobites have been used here as a means of refining our stratigraphic understanding of this unique succession. The revised stratigraphy demonstrates many similarities with the adjoining Midland Platform and the wider Silurian world. Notable features include the globally recognized early Sheinwoodian carbon isotope excursion and sea-level changes of regional and global extent. As one of the best examples of its kind, the palaeoshoreline and nearshore succession of Old Radnor and Presteigne acts as a depositional model for ancient rocky shores worldwide.

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Section: Depositional Environment Of the Dolyhir And Nash Scarsupporting

confidence: 76%

The Silurian Transgression of a Palaeoshoreline: The Area between Old Radnor and Presteigne, Welsh Borderlands

et al. 2021

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“…Biozone that the early Sheinwoodian positive carbon isotope excursion (ESCIE, sometimes referred to as the Ireviken excursion, see discussion in Loydell 2007) has been observed to commence elsewhere (e.g. Cramer et al, 2011;Lehnert et al, 2010;Loydell and Large, 2019).…”

Section: The Early Sheinwoodian Carbon Isotope Excursion (Escie)mentioning

confidence: 99%

“…Since these reviews, the excursion has been identified also in the Barrandian area, Czech Republic, by Frýda et al (2015) and in Poland (e.g. Racki et al, 2012;Smolarek et al, 2017;Sullivan et al, 2018), and a detailed study of the early stages of the excursion has been undertaken on the Buttington section, Wales (Loydell and Large, 2019). In sections with good biostratigraphical control, the ESCIE (with amplitudes varying from 2-4‰) can be seen to begin high in the Cyrtograptus murchisoni Biozone (Loydell and Frýda, 2007, fig.…”

Section: The Early Sheinwoodian Carbon Isotope Excursion (Escie)mentioning

confidence: 99%

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Early Silurian δ13Corg excursions in the foreland basin of Baltica, both familiar and surprising

Hammarlund

Loydell

Nielsen

et al. 2019

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Sommerodde-1 core from Bornholm, Denmark, provides a nearly continuous sedimentary archive from the Upper Ordovician through to the Wenlock Series (lower Silurian), as constrained by graptolite biostratigraphy. The cored mudstones represent a deep marine depositional setting in the foreland basin fringing Baltica and we present high-resolution data on the isotopic composition of the section's organic carbon (δ 13 Corg). This chemostratigraphical record is correlated with previously recognized δ 13 C excursions in the Upper Ordovician-lower Silurian, including the Hirnantian positive isotope carbon excursion (HICE), the early Aeronian positive carbon isotope excursion (EACIE), and the early Sheinwoodian positive carbon isotope excursion (ESCIE). A new positive excursion of high magnitude (~4‰) is discovered in the Telychian Oktavites spiralis Biozone (lower Silurian) and we name it the Sommerodde Carbon Isotope Excursion (SOCIE). The SOCIE appears discernible in δ 13 Ccarb data from Latvian and Estonian cores but it is not yet widely recognized. However, the magnitude of the excursion within the deep, marine, depositional setting, represented by the Sommerodde-1 core, suggests that the SOCIE reflects a significant event. In addition, the chemostratigraphical record of the Sommerodde-1 core reveals the negative excursion at the transition from the Aeronian to Telychian stages (the 'Rumba low'), and suggests that the commencement of the EACIE at the base of the Demirastrites triangulatus Biozone potentially is a useful chemostratigraphical marker for the base of the Aeronian Stage.

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Geochemical and sedimentary facies study – Implication for driving mechanisms of organic matter enrichment in the lower Silurian fine-grained mudstones in the Baltic Basin (W Lithuania)

Cichon-Pupienis

Littke

Lazauskienė

et al. 2021

International Journal of Coal Geology

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Biotic, geochemical and environmental changes through the early Sheinwoodian (Wenlock, Silurian) carbon isotope excursion (ESCIE), Buttington Quarry, Wales

Cited by 9 publications

References 76 publications

The Silurian Transgression of a Palaeoshoreline: The Area between Old Radnor and Presteigne, Welsh Borderlands

The Silurian Transgression of a Palaeoshoreline: The Area between Old Radnor and Presteigne, Welsh Borderlands

Early Silurian δ13Corg excursions in the foreland basin of Baltica, both familiar and surprising

Geochemical and sedimentary facies study – Implication for driving mechanisms of organic matter enrichment in the lower Silurian fine-grained mudstones in the Baltic Basin (W Lithuania)

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