Abstract
In a recent paper entitled, “Depositional palaeoenvironments in a tide-influenced delta plain with amphibian and Cycadophyta remains – the Triassic Zarzaitine Formation (Algerian eastern Sahara)” (Mazrou et al., 2024), we have demonstrated a prograding delta in an intertidal zone, on the basis of fieldwork yielding new sedimentological and palaeontological descriptions and interpretations. These are completely contrary to those of previous authors, who proposed rivers, lakes, sabkha, etc., as we shall demonstrate in the present note. However, in their comment, Dahoumane et al. (2025, in this issue) have accused us, without any valid argument, of having borrowed the work of other authors without citing them, claiming everything presented in our paper to be erroneous, and not based on work by Dahoumane herself or Dahoumane et al., but on so-called references cited. We shall provide proof in the present paper that not a single line has been borrowed from anyone, and also demonstrate that Dahoumane and Dahoumane et al. are not familiar with the basics of sedimentology, which makes them poor judges of sedimentary geology in any objective way. In addition, they do not know the Triassic terrains of Zarzaitine, confuse Triassic formations with those of Jurassic age that outcrop in the study region, and cite false bibliographic references to support their ‘claims’. We shall illustrate below that no information, detail or anything else was presented by Dahoumane et al. concerning the Triassic terrain studied, except for a plate presenting photographs, interpretations of which are all erroneous. We would have appreciated academic critique that could have helped us improve our work, instead of wasting our time responding to false allegations and nonsensical comments.
References
Abouessa A., Duringer Ph., Schuster M., Pelletier J. & Rubino J.L., 2014. Small-scale sedimentary structures and their implications in recognizing large-scale ancient tidal bedforms. Example from Dur At Talah outcrop, Late Eocene, Sirt Basin, Libya. Journal of African Earth Sciences 100, 346-364. DOI: https://doi.org/10.1016/j.jafrearsci.2014.07.008
Aït Ouali R., Nedjari A., Taquet P., Bitam L. & Tayeb Cherif L., 2011. Le Zarzaïtine Inférieur: derniers développements dans une série du Trias pro-parte [The Lower Zarzaitine (In Amenas, Algerian Sahara). Last developments in the Triassic pro-part series]. Mémoire du Service Géologique National – Algérie, 17, 9–26.
Allaby A. & Allaby M., 1991. Earth sciences. The concise oxford dictionary. Oxford New York University Press.
Arbey F., Aït Ouali R., Nedjari A., Bitam L. & Keddadra B., 2011. Découverte de peuplements diversifiés de "Thallophytes" champignons, algues, de grande taille, dans les séries continentales, triasiques et Jurassiques d'In Amenas [Discovery of diversified stocking of big-sized populations “Thallophyta” mushrooms and algae in the continental Triassic and Jurassic series of In Amenas]. Mémoire du Service Géologique National - Algérie 17, 27-65.
Boeuf S., Biju-Duval B., Rognon P., Gariel O., Charpal O. & Bennacef A., 1971. Les grès du Paléozoique inférieur au Sahara. Sédimentation et discontinuités evolution structurale d'un craton. Publication de l'institut français du pétrole. Collection 'Science et Technique du Pétrole’ no. 18.
Bouras R., 2010. Etude sédimentologique et contexte de la mise en place des formations jurassiques de la bordure du bassin d'Illizi. Université des sciences et de la technologie Houari Boumediène. Alger, Algérie.
Boureau E. & Caillon P., 1958. Sur la flore fossile et l'âge des couches de Taouratine dans le Bassin de Fort Polignac. (Illizi-Sahara algérien) Comptes rendus de de l'Académie des sciences de Paris 245, 544-545.
Bourquin S., Bercvici A., Lopez-Gomez J. & Amour F., 2010. The Permian–Triassic transition and the onset of Mesozoic sedimentation at the northwestern peri-Tethyan domain scale: Palaeogeographic maps and geodynamic implications. Palaeogeography Palaeoclimatology Palaeoecology 299, 265–280. DOI: https://doi.org/10.1016/j.palaeo.2010.11.007
Busson G., 1972. Principes, méthodes et résultats d’une étude stratigraphique du Mésozoïque saharien [Principles, methods and results of a stratigraphic study of the Saharan Mesozoic]. Mémoires du Muséum National d’Histoire Naturelle, Série C 26, Paris, 441 p.
Busson G. & Cornée A., 1989. Données sur lespaléoclimats déduites de la sédimentation continentale du Mésozoïque saharien [Paleoclimate data inferred from Saharan Mesozoic continental sedimentation]. Publication occasionnelle du Muséum national d’Histoire Naturelle de Paris, 95 p.
Dahoumane A., Nedjari A., Aït-Ouali R., Taquet P., Vacant R. & Steyer J.S., 2016. A new mastodonsauroid temnospondyl from the Triassic of Algeria. Implications for the biostratigraphy and palaeoenvironments of the Zarzaïtine Series, northern Sahara. Comptes Rendus Palevol 15, 918–926. DOI: https://doi.org/10.1016/j.crpv.2015.09.005
Dahoumane A., Tellal J., Nemra A., Naimi M.N. & Morkovin B.I., 2025. Comment on: Depositional palaeoenvironments in a tide-influenced delta plain with amphibian and Cycadophyta remains – the Triassic Zarzaitine Formation (Algerian eastern Sahara) by S. Mazrou, Y. Lasnami, J. Amer, A. Boutaleb. Geologos 31, this issue.
Davis R.A. & Dalrymple R.W., 2012. Principles of tidal sedimentology. Springer Editions, 621 pp. DOI: https://doi.org/10.1007/978-94-007-0123-6
Fabre J., 1976. Introduction à la géologie du Sahara algérien et des régions voisines. Editions SNED, Alger, 422 p.
Fabre J., 2005. Géologie du Sahara occidental et central. Vol. 108. African geoscience collection, Musée royal de l’Afrique centrale, 572 pp.
Klappa C.N., 1980. Rhizoliths in terrestrial carbonates: classification, recognition, genesis and significance. Sedimentology 27, DOI: https://doi.org/10.1111/j.1365-3091.1980.tb01651.x
Lapparent A.F., 1960. Les Dinosauriens du 'Continental Intercalaire' du Sahara central. Mémoires de la Société géologique de France, Paris, 88A, 57 pp.
Lapparent A.F. de, Claracq P. & Nougared F., 1958. Nouvelles découvertes de Vertébrés dansles séries continentales au Nord d’Edjeleh (Sahara central) [New discoveries of vertebrates in the continental series north of Edjeleh (central Sahara)]. Centre de Recherche de l’ Académie des Sciences de Paris 227, 1106–1108.
Laurin M., 2024. Habitat of early stegocephalians (Chordata, Vertebrata, Sarcopterygii): a little saltier than most paleontologists like? Fossil Record 27, 299–332 DOI: https://doi.org/10.3897/fr.27.e123291
Laurin M. & Soler-Gijón R., 2010. Physiology and morphology evidence from parsimony, taphonomy, palaeobiogeography, osmotic tolerance and habitat of early stegocephalians: indirect. Geological Society, London, Special Publications 339; p. 151-179. DOI: https://doi.org/10.1144/SP339.13
Lehman J.P., 1957. Les stégocéphales sahariens. Annales de Paléontologie (Vertébrés) 53, 139–146.
Lehman J.P., 1971. Nouveaux vertébrés du Trias de la série de Zarzaïtine. Annales de Paléontologie (Vertébrés) 57, 71–93.
Mazrou S., 2010. Les Formations continenetales du Crétacé et Plio-quaternaire du plateau du Tidikelt (Sahara central, Algérie): Sédimentologie, paléogéographie et approche géodynamique. Université des sciences et de la technologie Houaru Boumediane, Alger, Algérie.
Mazrou S., 2023. Les terrains post-lutétiens de la bordure méridionale des Nementcha (sud des Aurès et de la région de Tébessa (Atlas saharien oriental). Sédimentologie, Stratigraphie et Paléoenvironnements. Université d'Oran, Algérie.
Mazrou S. & Lasnami Y., 2022. Les épondages détritiques continentaux du Mio-pliocène de la bordure méridionale des monts des Nementcha (Atlas saharien oriental, Algérie). Charactéristiques sédimentologiques et implications environnementales [The Mio-Pliocene terresterial siliciclastic deposits of the southern edge of the Nementcha mountains (Eastern Sahara Atlas, Algeria). Sedimentological characteristics and paleoenvironmental implications]. Bulletin du Service Géologique de l'Algérie 31, 79-98.
Mazrou S. & Mahboubi M., 2021. Tidally dominated Miocene deltaic deposits and pipe rocks in the Tebessa Basin, eastern Algeria: sedimentological and ichnological characteristics. Geologos 27, 15–34, DOI: https://doi.org/10.2478/logos-2021-0002
Mazrou S., Bougeroua R. & Fellag K., 2016. La formation à bois fossile du Continetal Intercalaire (Néocomien-Barrémien) du Sahara algérien (Gourara,Touat,Tidikelt). Contextes Biorhexistasique et climatique [The formation with a fossil tree trunk of the 'Continental intercalaire' (Neocomian-Barremian) of the Algerian Sahara (Gourara, Touat, Tidikelt). Biorhexistastic and climatic contexts]. Mémoires du Service Géologique de l'Algérie 19, 91- 112.
Mazrou S., Lasnami Y., Amer J. & Boutaleb A., 2024. Depositional palaeoenvironments in a tide-influenced delta plain with amphibian and Cycadophyta remains – the Triassic Zarzaitine Formation (Algerian eastern Sahara). Geologos 30, 209–229. DOI: https://doi.org/10.14746/logos.2024.30.3.19
Nedjari A., Aït Ouali R., Taquet P. & Bitam L., 2009. La discordance hercynienne de Tiguentourine (In Amenas, Sahara algérien): Un Geotop à classer. Bulletin du service géologique national 20, 87-91.
Nedjari A., Bitam L., Steyer J.S., Taquet Ph., Vacant R. & Kedadra B., 2010. Découverte d’un nouveau gisement de Stégocéphales d’une conservation exceptionnelle dans le Trias d’In Amenas (Bassin d’Illizi, Algérie) [Discovery of a new deposit of Stegocephali of exceptional preservation in the Triassic of In Amenas (Illizi Basin, Algeria)]. Bulletin du Service Geologique National 21, 211 – 228.
Steyer S., 2001. Ontogénie et phylogénie des stégocéphales temnospondyles et seymouriamorphes : implications paléobiologiques et paléoenvironnementales. Muséum national d'histoire naturelle, Paris.
Steyer J.S., Boulay M. & Lorrain S., 2010. 3D external restorations of stegocephalian skulls using ZBrush: The renaissance of fossil amphibians. Comptes Rendus Palevol 9, 463-470. DOI: https://doi.org/10.1016/j.crpv.2010.07.007
Steyer J.-S., Peecook B.R., Arbez T., Nesbitts J., Tolan S., Stocker M.R. & Sidor C.A., 2021. New data on the Triassic temnospondyls from the Karoo rift basins of Tanzania and Zambia. Geodiversitas 43, 365-376. http://geodiversitas.com/43/12 DOI: https://doi.org/10.5252/geodiversitas2021v43a12
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