The Early Carboniferous (Mississippian) ammonoids from the Chebket el Hamra (Jerada Basin, Morocco)

Korn, Dieter; Ebbighausen, V.

doi:10.5194/fr-11-83-2008

Cited by 4 publications

(5 citation statements)

References 11 publications

(32 reference statements)

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“…The stratigraphic correlations into the shallow parts of the basin are so far not well constrained, because of tectonic complication and the partial absence of good lithostratigraphic and biostratigraphic marker horizons. However, the succession studied by Korn and Ebbighausen (2008) is lithologically similar to the interval Ç afçaf to Oued Es-Sassi formations, the absence of limestone beds makes the Koudiat Es-Senn Formation unrecognizable.…”

Section: Discussionmentioning

confidence: 92%

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Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography

Aretz

2009

Paläontol. Z.

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The Viséan succession of the Jerada Massif contains a relatively diverse rugose coral fauna, which comprises 12 genera. Only two of these (Siphonodendron and Lithostrotion) are reported to include more than one species. Most taxa show distinctive facies dependencies. Small solitary corals are found in shaly environments of the Oued Es-Sassi Formation. On the northern flank a coral patch reef formed on an oolitic shoal in the Koudiat EsSenn Formation. Its core mainly consists of Lithostrotion vorticale colonies, whereas in its surroundings literally hundreds of specimens of Siphonophyllia samsonensis occur. Associated with these dominant taxa occur colonial and further large solitary taxa (Palaeosmilia, Dibunophyllum). Tizraia and Pareynia are restricted to microbialdominated buildup facies. Their presence might be strongly controlled by the development of this buildup type, because further occurrences in Algeria, Morocco, and Belgium are all in the same facies. The coral fauna at Jerada is a typical Late Viséan assemblage for the Western European Province. The Eastern Moroccan Meseta may be an important pathway within the province for the connection between the Central Saharan basins and NW Europe. The biostratigraphic ages of the coral fauna partly contradict ages based on carbonate microfossils; the coral ages are slightly older and typical Brigantian coral taxa are absent. Keywords Viséan Á Rugose corals Á Jerada Massif Á Eastern Moroccan Meseta Á Palaeobiogeography Kurzfassung Die viséische Abfolge des Jerada-Massivs enthält eine relativ diverse Fauna. Diese Fauna umfasst 12 Gattungen, aber mehrere Arten sind nur in zwei dieser Gattungen (Siphonodendron und Lithostrotion) vertreten. Die meisten Taxa zeigen eine deutliche FaziesAbhängigkeit. Kleine solitäre Formen sind nur aus schiefrigen Gesteinen der Oued Es-Sassi-Formation bekannt. Auf dem Nordflügel des Jerada-Synklinoriums bildete sich in der Koudiat Es-Senn-Formation an einer oolitischen Barre ein Korallen-Patch-Riff.Sein Kern besteht im Wesentlichen aus Lithostrotion vorticale-Kolonien. Das Riff wird von zahlreichen (einigen hundert) Exemplaren von Siphonophyllia samsonensis umgeben. Assoziiert mit diesen beiden dominierenden Taxa sind weitere großwüchsige solitäre (Palaeosmilia, Dibunophyllum) und koloniale Taxa. Tizraia und Pareynia sind nur in mikrobiell-dominierter Buildup-Fazies zu finden. Ihr Vorkommen scheint generell auf diesen Builduptyp beschränkt, wie weitere Vorkommen in gleicher Fazies in Algerien, Marokko und Belgien zeigen. Die Korallenfauna von Jerada ist typisch für Assoziationen des späten Viséums innerhalb der westeuropäischen Faunenprovinz. Die Ö stliche Marokkanische Meseta stellt einen möglichen Verbindungsweg innerhalb dieser Provinz zwischen den Becken der zentralen Sahara und Westeuropa dar. Die biostratigraphischen Alter der Korallen stehen in einem gewissen Widerspruch zu den auf kalkigen Mikrofossilien beruhenden Altern. Die Korallen-Alter sind etwas älter, typische Vertreter des Brigantiums fehlen. Schlü sselwörter Viséum Á ...

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Section: Discussionmentioning

confidence: 92%

“…New ammonoid data of Korn and Ebbighausen (2008) from pelites in the Chebket el Hamra area, in the NE of the Jerada synclinorium, partly help to elucidate this problem. These data are from a somewhat deeper and almost carbonate-free part of the basin.…”

Section: Discussionmentioning

confidence: 96%

Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography

Aretz

2009

Paläontol. Z.

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“…Similar, but impoverished assemblages are known from the Cantabrian Mountains of Spain (Kullmann 1961(Kullmann , 1962(Kullmann , 1963, Algeria (Pareyn 1961) and the Anti-Atlas of Morocco (Korn et al 1999, Klug et al 2006. Faunas with a different spectrum of genera are known from other areas, for instance the Subvariscan region (Korn 1988(Korn , 1997bKorn and Ebbighausen 2008), the American West (Korn and Titus 2011) and the American Midcontinent (e.g., Gordon 1965).…”

Section: Carboniferousmentioning

confidence: 99%

Taxonomic Diversity and Morphological Disparity of Paleozoic Ammonoids

Korn

Klug

Walton

2015

Topics in Geobiology

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The Ammonoidea are well represented in terms of numbers of species over a large range of time and they have survived many extinction events. The time interval from the Early Devonian through to the Triassic has seen ammonoid groups evolve and become extinct. The evolutionary history of the Paleozoic ammonoids was punctuated by some extinction events with near extinction events and subsequent recoveries. A Principal Components Analysis (PCA) based on the conch width index (CWI), umbilical width index (UWI) and whorl expansion rate (WER) parameters from 4834 ammonoid species of Devonian to Triassic age produced an empirical morphospace this time interval. The morphospace of Paleozoic ammonoids shows some subtle changes between the periods, but generally, the occupied area is remarkably similar.

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“…6.4). In detail, the investigations led to the following results (Korn and Ebbighausen 2008). There is disagreement about the position of the Moroccan Meseta; Stampfli and Borel (2002) place the Moroccan Meseta directly adjacent to the South Portuguese Zone, whereas Torsvik and Cocks (2004) as well as Cocks and Torsvik (2006) see it at the northernmost margin of Gondwana.…”

Section: Late Viséan and Serpukhovian Biogeographymentioning

confidence: 99%

Biogeography of Paleozoic Ammonoids

Korn

Baets

2015

Topics in Geobiology

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The Early Carboniferous (Mississippian) ammonoids from the Chebket el Hamra (Jerada Basin, Morocco)

Abstract: Five Late Visan ammonoid assemblages of North Variscan provenance are described from the locality Chebket el Hamra (Jerada Basin, northeastern Morocco). These assemblages are composed of 27 species of the genera Eoglyphioceras,

Cited by 4 publications

References 11 publications

Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography

Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography

Taxonomic Diversity and Morphological Disparity of Paleozoic Ammonoids

Biogeography of Paleozoic Ammonoids

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