Brachiopods and rugose corals in an upper Serpukhovian (Mississippian) biostrome: preliminary results from the Djebel Arhlal (Béchar Basin, Algeria)

K. F. T. Atif; M. Aretz; M. Legrand-Blain; A. Bouzid; M. Aimouche

doi:10.21701/bolgeomin.127.2-3.004

Authors

K. F. T. Atif Laboratoire de Paléontologie Stratigraphique et Paléoenvironnement, Département des Sciences de la Terre et de l’Univers, Université Oran 2
M. Aretz Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées, Université de Toulouse, CNRS, IRD
M. Legrand-Blain
A. Bouzid
M. Aimouche Faculté des Sciences de la Terre, de Géographie et de l’Aménagement du Territoire, Département des Sciences de la Terre et de l’Univers, Université Oran 2

DOI:

https://doi.org/10.21701/bolgeomin.127.2-3.004

Keywords:

Béchar Basin, Algeria, Serpukhovian, coral biostromes, brachiopods

Abstract

The Djebel Arhlal is the southernmost outcrop of upper Serpukhovian strata in the Béchar Basin. Here the Djenien member of the Djenien Formation is three-folded and it contains a 10 m-thick coral biostrome in its middle unit formed by Siphonodendron, Diphyphyllum and Lithostrotion. Distances between in situ colonies are in the order of several decimetres and the space between them is filled with bioclastic limestone containing coral rubble. Few brachiopods and solitary corals are found as dwellers within the biostrome, but these groups are much more common in the strata below and above the coral biostrome. This is especially true for the brachiopods, which reach diversities of more than a dozen species in specific horizons. They mainly belong to the orders Productida, Spiriferida and Athyridida. Agitated open-marine platform interior or platform margin settings are the general facies encountered in the Djenien member at the Djebel Arhlal. The field data, including brachiopod coquinas and many fragmented brachiopods and corals, are confirmed by microfacies analysis. However, the coral biostrome records a quieter setting at the interface of middle and outer ramp settings, as seen in the co-existence of in situ coral growth, input of reworked material, deposition of carbonate mud, and sparitic textures. This autoparabiostrome at Djebel Arhlal is compared to other rather thick and of exceptional horizontal extension upper Serpukhovian biostromes (few kilometres).

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References

Alexander, R.R. 1986. Life orientation and post-mortem re-orientation of Chesterian brachiopod shells by paleocurrents. Palaios, 1, 303-311. https://doi.org/10.2307/3514693

Aretz, M. 2001. The upper Viséan coral-horizons of Royseux - The development of an unusual facies in Belgian Early Carboniferous. Tohoku University Museum Bulletin, 1, 86-95.

Aretz, M. 2002. Habitatanalyse und Riffbildungspotential kolonialer rugoser Korallen im Unterkarbon (Mississippium) von Westeuropa. Kölner Forum für Geologie und Paläontologie, 10, 1-155.

Aretz, M. 2010. Habitats of colonial rugose corals: the Mississippian of western Europe as example for a general classification. Lethaia, 43, 558-572. https://doi.org/10.1111/j.1502-3931.2010.00218.x

Aretz, M. and Chevalier, E. 2007. After the collapse of stromatoporid-coral reefs - the Famennian and Dinantian reefs of Belgium: much more than Waulsortian mounds. In: Alvaro, J.J., Aretz, M., Boulvain, F., Munnecke, A., Vachard, D. and Vennin, E. (Eds.), Palaeozoic Reefs and Bioaccumulations: Climatic and Evolutionary Controls. Geological Society, London, Special Publications, 275, 163-188. https://doi.org/10.1144/GSL.SP.2007.275.01.11

Aretz, M. and Nudds, J. 2007. Palaeoecology of the Late Viséan (Dinantian) coral-chaetetid biostrome at Little Asby Scar (Cumbria, Great Britain). In: Hubmann, B. and Piller, W. (eds.), Fossil corals and sponges. Proceeding of the 9th international Symposium on Fossil Cnidaria and Porifera, Graz 2003. Schriftenreihe der Erdwissenschaftlichen Kommission der Österreichischen Akademie für Wissenschaften, 17, 365-381.

Aretz, M. and Herbig, H.G. 2003. Contribution of rugose corals to Late Viséan and Serpukhovian bioconstructions in the Montagne Noire (Southern France). In: Ahr, W., Harris, P. M., Morgan, W.A. and Somerville, I.D. (eds.), Permo-Carboniferous carbonate platforms and reefs. SEPM Special Publications, 78 /AAPG Memoir 83: 119-132. https://doi.org/10.2110/pec.03.78.0119

Aretz, M. and Herbig, H.G. 2008. Microbial-sponge and microbial-metazoan buildups in the Late Viséan basin-fill sequence of the Jerada Massif (Carboniferous, NE Morocco). In: Aretz, M., Herbig, H.G. and Somerville, I. (eds.), Carboniferous Platforms and Basins. Geological Journal, 43, 307-336. https://doi.org/10.1002/gj.1120

Aretz, M., Herbig, H.G., Somerville, I. and Cozar, P., 2010. Rugose coral biostromes in the late Viséan (Mississippian) of NW Ireland: Bioevents on an extensive carbonate platform. Palaeogeography, Palaeoclimatology, Palaeoecology, 292, 488-506. https://doi.org/10.1016/j.palaeo.2010.04.017

Atif, K.F.T. 2012. Contribution à l'étude géologique de la série carbonifère dans le Bassin de Béchar. Thèse de Doctorat Sciences, Université d'Oran, 182 pp.

Atif, K.F.T. and Legrand-Blain, M., 2011. Apparition des Choristitinae (Brachiopodes Spiriferida) au Bashkirien inférieur dans le bassin de Béchar, Sahara Algérien nord-occidental. Comptes Rendus Palevol, 10, 225-237. https://doi.org/10.1016/j.crpv.2011.01.008

Bourque, P.A. 2007. Viséan sponge-fenestellid bryozoan mounds and microbial-coral reefs, Algeria. In: Vennin, E., Aretz, M., Boulvain, F. and Munnecke, A. (eds.), Facies from Palaeozoic reefs and bioaccumulations. Mémoires du Museum national d'Histoire naturelle de Paris, 198, 249-251.

Bourque, P.A., Madi, A. and Mamet, B.L. 1995. Waulsortian-type bioherm development and response to sea-level fluctuations: upper Visean of Béchar Basin, western Algeria. Journal of Sedimentary Research, B 65, 1, 80-95. https://doi.org/10.1306/D42681E9-2B26-11D7-8648000102C1865D

Conrad, J. 1985. North Africa. - Northwestern and central Saharan areas. In: Wagner, R.H., Winkler Prins, C.F. and Granados, L.F., (eds.), The Carboniferous of the world. II - Australia, Indian Subcontinent, South Africa, South America and North Africa. IUGS Publication, 20, 303-306.

Fabre, J. and Kazi-Tani, N. 2005. Le Permo-Carbonifère. In: Fabre, J. Géologie du Sahara occidental et central. Musée royal de l'Afrique centrale - Belgique. Tervuren African Geoscience Collection, 108, 295-360.

Kershaw, S. 1994. Classification and geological significance of biostromes. Facies, 31, 81-92. https://doi.org/10.1007/BF02536934

Legrand-Blain, M. 1980. Les Gigantoproductides (brachiopodes) du Sahara Algérien. III - Semiplanidae viséens et namuriens. Bulletin de la Société d'Histoire Naturelle de l'Afrique du Nord, 69, 1-2, 86 pp.

Legrand-Blain, M. 1985. Dynamique des brachiopodes carbonifères sur la plate-forme carbonatée du Sahara algérien. Paléoenvironnements, paléobiogéographie, évolution. Thèse de Doctorat Sciences, Université Bordeaux 1, 317 pp.

Legrand-Blain, M. 1986. Spiriferacea (Brachiopoda) viséens et serpukhoviens du Sahara Algérien. Biostratigraphie du Paléozoïque, Université de Bretagne Occidentale, Brest. 5,85 pp.

Legrand-Blain, M. 1987. Les Gigantoproductidae (brachiopodes) namuriens du Sahara Algérien. Bulletin de la Société Belge de Géologie, 96, 2, 159-194.

Lemosquet, Y. and Pareyn, C. 1982. Evolution du processus récifal au cours du Carbonifère dans le bassin de Béchar (Sahara sud-oranais, Algérie): Université de Dijon, Mémoires Géologiques, 7 , 433-442

Lemosquet, Y. and Pareyn, C. 1985. North Africa. Bechar Basin. In: Wagner, R.H., Winkler Prins, C.F. and Granados, L.F., (eds.), The Carboniferous of the world. II - Australia, Indian Subcontinent, South Africa, South America and North Africa. IUGS Publication, 20, 306-315.

Madi, A., Bourque, P.A. and Mamet, B.L. 1996. Depth-related ecological zonation of a Carboniferous carbonate ramp: Upper Viséan of Béchar Basin, Western Algeria. Facies, 35, 59-80. https://doi.org/10.1007/BF02536957

Madi, A., Savard, M.M., Bourque, P.A. and Chi, G. 2000. Hydrocarbon Potential of the Mississippian Carbonate Platform, Bechar Basin, Algerian Sahara. AAPG Bulletin, 84 (2), 266-287. https://doi.org/10.1306/C9EBCDC9-1735-11D7-8645000102C1865D

Manger, W.L., Weyant, M. and Pareyn, C. 1985. Mid-Carboniferous Ammonoid biostratigraphy, Bechar basin, Algeria. Courier Forschungsinstitut Senckenberg, 74, 181-196.

Ogar, V.V. 2012. Carboniferous buildups in the Donets Basin (Ukraine). In: Denayer, J., Aretz, M. and Poty, E. (eds.), Proceedings of the XIth International Symposium of Fossil Cnidaria and Porifera, Liège 2011, Geologica Belgica, 15/4, 340-349.

Pareyn, C. 1961. Les massifs carbonifères du Sahara Sud-Oranais. I: Stratigraphie et tectonique, 326 pp. II: Paléontologie stratigraphique, 245 pp. Publications du Centre de Recherches sahariennes, Série Géologie, Editions du Centre National de la Recherche Scientifique, 1.

Pareyn, C., Conrad, G., Conrad, J. and Lemosquet, Y. 1971. Mise en évidence d'une instabilité orogénique au Namurien inférieur entre les vallées du Guir et de la Zousfana (Bassin de Béchar, Sahara nord-occidental). Bulletin de la Société géologique de France, 7, XIII, 512-527. https://doi.org/10.2113/gssgfbull.S7-XIII.5-6.512

Rodríguez, S., Somerville, I.D., Said, I. and Cózar, P. 2013. Mississippian-like rugose corals from a Bashkirian biostrome in the Tindouf Basin, S. Morocco. Spanish Journal of Palaeontology, 28 (2), 255-284. https://doi.org/10.7203/sjp.28.2.17858

Sebbar, A. 1986. Foraminifères et algues calcaires du Carbonifère inférieur (Viséen supérieur, Serpukhovien) de coupes significatives du Bassin de Béchar (Sahara sud-oranais, Algérie). Utilisation paléobiogéographique. Thèse Diplôme de Docteur de 3° Cycle, Université P. M. Curie Paris 6, 151 pp., 11 Pl.

Sebbar, A. 2006. Echelle biozonale de foraminifères du Carbonifère Saharien en Algérie. Mémoires du Service Géologique National, Alger, 13, 169-187.

Sebbar, A. and Lys, M. 1989. Biostratigraphie du Carbonifère inférieur: Serpukhovien du Djebel Arlal, bassin de Béchar, Algérie. Revue de Micropaléontologie, 32, 1, 53-62.

Semenoff-Tian-Chansky, P. 1974. Recherches sur les Tétracoralliaires du Carbonifère du Sahara occidental. Centre de Recherches sur les Zones Arides, Série Géologie, Editions du Centre National de la Recherche Scientifique, 21, 316 pp.

Semenoff-Tian-Chansky, P. 1985. North Africa. Corals. In: Wagner, R.H., Winkler Prins, C.F. and Granados, L.F., (eds.), The Carboniferous of the world. II - Australia, Indian Subcontinent, South Africa, South America and North Africa. IUGS Publication, 20, 374-381.

Somerville, I.D., Cozar, P. and Rodríguez, S., 2007. Late Viséan rugose coral faunas from South-Eastern Ireland: composition, depositional setting and palaeoecology of Siphonodendron biostromes. In: Hubmann, B. and Piller, W.E. (ed.), Fossil corals and sponges. Schriftenreihe der Erdwissenschaftlichen Kommissionen der Österreichischen Akademie der Wissenschaften, 17, 307-328.

Somerville, I.D., Cozar, P., Aretz, M., Herbig, H.G., Mitchell, I. and Medina-Varea, P. 2009. Carbonate facies and biostromal distribution in a tectonically controlled platform in northwest Ireland during the late Visean (Mississippian). Proceedings of the Yorkshire Geological Society, 57, 165-192. https://doi.org/10.1144/pygs.57.3-4.165

Wendt, J., Kaufmann, B. and Belka, Z. 2001. An exhumed Palaeozoic underwater scenery: the Visean mud mounds of the eastern Anti-Atlas (Morocco). Sedimentary Geology, 145, 215-233. https://doi.org/10.1016/S0037-0738(01)00149-X

Weyant, M. 1982. A proposal for a major boundary in the Carboniferous system based upon conodonts evidence from the Bechar basin (Algeria). In: Ramsbottom, W.H.C., Saunders, W.B. and Owens, B. (eds.), Biostratigraphic data for a Mid-Carboniferous boundary. Subcommission on Carboniferous Stratigraphy, Leeds 1982, 19-21.