Lower-middle Viséan transgressive carbonates in Morocco: Palaeobiogeographic insights

Cózar, Pedro; Vachard, Daniel; Izart, Alain; Said, Ismael; Somerville, Ian D.; Rodrı́guez, Sergio; Coronado, Ismael; Houicha, Mohamed El; Ouarhache, Driss

doi:10.1016/j.jafrearsci.2020.103850

Cited by 14 publications

(18 citation statements)

References 66 publications

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“…2018; Cózar et al . 2020 b ), whereas in Trowbarrow Quarry they are abundant at the base of the section, later becoming relatively rare, and then they show a second and more important acme in the upper part of the section.…”

Section: Foraminifers and Algae In Trowbarrow Quarry (This Study)mentioning

confidence: 97%

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A late Asbian (Mississippian) stratotype for England: Trowbarrow Quarry, Cumbria, UK

Cózar

Somerville

Hounslow

et al. 2022

Papers in Palaeontology

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A detailed biostratigraphy is established, using the high foraminiferal abundance and diversity at Trowbarrow Quarry, which is also proposed as a stratotype section for the late Asbian (late Visean), a substage not previously formally subdivided. The foraminiferal assemblages suggest that the early Asbian has to be revised, which has implications for the chronostratigraphy of many late Visean outcrops in Britain, which are probably erroneously interpreted. From the upper part of the Park Limestone Formation at Trowbarrow Quarry, near the base of the section, the transition between foraminifers assigned to the early and late Asbian (Cf6α–β to Cf6γ subzones) is identified. The Urswick Limestone Formation contains excellent biostratigraphic records of many important taxa, enabling the subdivision of the formation into five foraminiferal assemblage zones for the late Asbian, namely Cf6γ1a, Cf6γ1b, Cf6γ2a, Cf6γ2b and Cf6γ2c. The last assemblage is currently recognized only in the North Pennines and at Trowbarrow. These assemblages enable revision of the stratigraphic range of many taxa used as biostratigraphic markers in Britain and Ireland. Owing to its excellent foraminiferal record, the late Asbian subdivisions will significantly facilitate the reinterpretation of other well‐known Asbian platform carbonate successions in Britain. Although there are some faunal differences, the base of the late Asbian can be confidently correlated to other European zonal schemes, with its base being equivalent to the base of the former V3bγ or more recent MFZ14 foraminiferal zones of Belgium, and the base of the Mikhailovian Substage in Russia.

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Section: Foraminifers and Algae In Trowbarrow Quarry (This Study)mentioning

confidence: 97%

“…2020; Cózar et al . 2020 b ; Kulagina 2021), Only rarely is the Aleksinian correlated to the middle part of the Holkerian (Lucas 2021).…”

Section: Biozonation and Analysismentioning

confidence: 99%

A late Asbian (Mississippian) stratotype for England: Trowbarrow Quarry, Cumbria, UK

Cózar

Somerville

Hounslow

et al. 2022

Papers in Palaeontology

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“…The sedimentation continued with sandstones and shales interbedded with sporadic lenses of limestones containing Tournaisian fauna (Figure 2; Lecointre and Delepine, 1933). Upwards, a 400 m-thick succession of sandstones and shales with abundant limestone lenses was dated as Lower Visean (Izart and Vieslet, 1988;Lecointre and Delepine, 1933), although recent studies have re-dated it as Upper Visean based on a review of their foraminiferal content (Cózar et al, 2020). The entire Upper Devonian-Tournaisian succession is intruded by Permian basic dykes (Figure 2; Cailleux et al, 1983;Kharbouch, 1994).…”

Section: Tiflet Areamentioning

confidence: 99%

Syn-collisional detrital zircon source evolution in the northern Moroccan Variscides

et al. 2021

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“…Indirectly, for this communication with the Paleotethys Ocean to occur, it is envisaged that the Moroccan Meseta was not attached to Gondwana during the Visean (Fig. 6), a fact described only for the early to mid-Visean (Cózar et al, 2020), whereas for the late Visean-early Serpukhovian interval, it is not yet clearly defined. However, if the Meseta was attached to Gondwana, this would imply higher similarity indices between the Meseta and the Maritimes Basin than with Gondwana, which is not the case.…”

Section: Journal Of Paleontology:1-20mentioning

confidence: 91%

Paleotethyan faunal/floral evidence in the Mississippian Maritimes Basin of Canada: An overview

Cózar

Somerville

2021

J. Paleontol.

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In this study, middle to late Mississippian microfossil assemblages from the Maritimes Basin of eastern Canada (Nova Scotia, SW Newfoundland, and New Brunswick) are closely compared to those from Western Paleotethys basins. The comparison is focused mainly on foraminifers and calcareous algae. Most foraminifers and algae described from the Maritimes Basin are considered cosmopolitan, and the occurrence in western Europe and northern Africa of taxa previously considered endemic to the North America Realm suggests a close paleobiogeographic relationship. This European/African correlation is further supported by other foraminiferal/algal taxa, the importance of which were previously overlooked, including: Plectogyranopsis ex gr. P. hirosei (Okimura, 1965), Mikhailovella Ganelina, 1956, Koktjubina windsorensis (Mamet, 1970), Polysphaerinella bulla Mamet, 1973, Mstinia Dain in Dain and Grozdilova, 1953, Haplophragmina Reitlinger, 1950, Omphalotis Shlykova, 1969, Pseudolituotuba Vdovenko, 1971, Pseudoendothyra Mikhailov, 1939, Saccamminopsis (Sollas, 1921) Vachard and Cózar, 2003, Kamaenella Mamet and Roux, 1974, and Anthracoporellopsis Maslov, 1956. Some species recorded in the Maritimes Basin have been typically recorded in Britain and Ireland in the southern platform of Laurussia. This implies a connection via the Rhenohercynian Ocean, whereas statistical analyses suggest that Maritimes Basin assemblages are closer to those of the Gondwana platform, which could have been established via the Paleotethys Ocean, and also with terranes northwest of the Variscan Front, in which its most logical connection should be with a still-open Rheic Ocean during the Visean and early Serpukhovian. Those taxa demonstrate a more-or-less continuous faunal and microfloral interchange between the Maritimes Basin and the Western Paleotethys paleobiogeographic realm. Furthermore, the width of the Paleotethys and Rheic oceans separating these regions is not considered excessive, particularly during the late Visean and early Serpukhovian.

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Lower-middle Viséan transgressive carbonates in Morocco: Palaeobiogeographic insights

Cited by 14 publications

References 66 publications

A late Asbian (Mississippian) stratotype for England: Trowbarrow Quarry, Cumbria, UK

A late Asbian (Mississippian) stratotype for England: Trowbarrow Quarry, Cumbria, UK

Syn-collisional detrital zircon source evolution in the northern Moroccan Variscides

Paleotethyan faunal/floral evidence in the Mississippian Maritimes Basin of Canada: An overview

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