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Geology / Turonian


  • Upper Cretaceous
    • Turonian

Aporrhaidae from the Turonian:

Pugnellidae from the Turonian:

Tylostomidae from the Turonian:

Tylostoma cossoni Thomas & Péron, 1889; Syntype; Turonian, upper Cretaceous; Djebel Meghila, Tunesia; Photo: Gaëlle Doitteau; Coll. MNHN B19221; Copyright Museum national d'Histoire naturelle Paris

The Strehlen-Formation belongs to the Lower Coniacian, Upper Turonian.


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  • Anoh, N.O., & Petters, S.W. (2014). Preliminary investigation of Late Turonian-Early Campanian shallow marine foraminifera of the Mungo River/Logbadjeck Formation, NW Douala Basin, Cameroon. Journal of African Earth Sciences, 99, 442–451
  • Barroso-Barcenilla, F. (2007). Revision and new data of the ammonite family Acanthoceratidae de Grossouvre, 1894, from the lower Turonian of the Iberian Trough, Spain. Palaeontographica, Abt.A. Bd.280. P.123-163
  • Baryshnikova, V.I. (1959). On the subdivision of the Turonian-Coniackian deposits of the Middle Don basin. Scientific reports of the Saratov State Univ. Geological issue. Vol.65. P.65-77
  • Baudouin, C., Delanoy, G., Ifrim, C. & Moreno-Bedmar, J.A. (2018). The ammonoid fauna of the Prionocyclus germari Zone (upper Turonian, upper Cretaceous) from Rochefort-en-Valdaine (Drôme, France). Carnets Geol. 18 (14)
  • Bert, D., Peres, V., Marchand, D. (2006). Nouvelles données stratigraphiques sur le Turonien moyen (Crétacé supérieur) du versant septentrional du Seuil du Poitou (Centre-Ouest de la France): description de Pseudotissotia faustinleybachae sp. nov., et évolution des Pseudotissotinae Hyatt, 1903 (Ammonoidea) ouest-européens // Ann. Mus. Hist. Nat. Nice. T.21. P.297-317
  • Bromley, R. G., & Gale, A. S. (1982). The lithostratigraphy of the English Chalk Rock. Cretaceous Research (1982) 3, 273-306
  • Cobban, W.A., Walaszczyk, I., Obradovich, J.D., and McKinney, K.C. (2006). A USGS zonal table for the Upper Cretaceous middle Cenomanian−Maastrichtian of the Western Interior of the United States based on ammonites, inoceramids, and radiometric ages. U.S. Geological Survey Open-File Report 2006-1250, 45 p.
  • Ettachfini, E.M. & Andreu, B. (2004). Le Cénomanien et le Turonien de la Plate-forme Préafricaine du Maroc. Cretaceous Research 25 (2004) 277-302
  • Gale, A.S., Kennedy, W.J. and Walaszczyk, I. (2019). Upper Albian, Cenomanian and Lower Turonian stratigraphy, ammonite and inoceramid bivalve faunas from the Cauvery Basin, Tamil Nadu, South India. Acta Geologica Polonica, 69 (2), 161–338
  • Helenes, J. & Somoza, D. (1999). Palynology and sequence stratigraphy of the Cretaceous of eastern Venezuela. Cretaceous Research, 20(4), 447–463
  • Howarth, M.K. (1985). Cenomanian and Turonian ammonites from the Novo Redondo area, Angola. Bulletin of the British Museum, Natural History. Geology. Vol. 39. no. 2. P.73-105
  • Kennedy, W.J. (2020). Upper Albian, Cenomanian and Upper Turonian ammonite faunas from the Fahdène Formation of Central Tunisia and correlatives in northern Algeria. Acta Geologica Polonica, Vol. 70 (2020), No. 2, pp. 147–272
  • Kennedy, W.J. (2021). On some Turonian and Coniacian ammonites from central Colombia. Acta Geologica Polonica, Vol. 71 (2021), No. 3, pp. 259–285
  • Khomentovsky, O.V. (1992). Inocerams of the Cenomanian - Turonian boundary beds of the Ust-Yenisei depression. Geological history of the Arctic in the Mesozoic and Cenozoic. St. Petersburg, VNIIOkeangeologiya. P.78-85
  • Korchagin, O.A. (1989). Agglutinated foraminifers from the Cenomanian and Turonian deposits of the Tajik depression. in New Species of the Phanerozoic Fauna and Flora of Tajikistan. Donish, Dushanbe. P.14–26
  • Moussavou, B.M. & Angoue, M.N. (2014).Turonian gastropods from the Coastal Basin of Gabon: Gabon store section, South of Libreville. Bulletin de l’Institut Scientifique, Rabat, Section Sciences de la Terre, 2014, n° 36, 19–26
  • Moussavou, B.M. & Mougola, W.L-B. (2016). Bivalves et gastéropodes du Turonien du port d’Owendo dans le bassin côtier nord gabonais. Rev. Cames, Vol. 04, Num. 02, 2016
  • Moussavou, B.M. (2017). Systematics, palaeoecology and taphonomy of Turonian oysters from the northern Gabon Coastal Basin. Geodiversitas 2017, 39 (2)
  • Niebuhr, B., Wilmsen, M. & Voigt, T. (2020). Die Oberkreide (Cenomanium–Mittelconiacium) im Zittauer Sandsteingebirge (Deutschland, Tschechien). [The Upper Cretaceous (Cenomanian–Middle Coniacian) of the Zittau Sandstone Mountains (Germany, Czechia).] – Z. Dt. Ges. Geowiss., 171: 163–197, Stuttgart
  • Ravn, J. P. J. 1918: Kridtaflejringerne paa Bornholms sydvestkyst og deres fauna. II. Turonet. Danmarks Geol. Unders. II. Raekke 31, 39 pp. [In Danish].
  • Reyment, R.A. (1954). Some new Upper Cretaceous ammonites from Nigeria. Colonial Geology and Mineral Resources, V. 4, no. 3. pp. 248-270
  • Reyment, R.A. (1955). The Cretaceous Ammonoidea of Southern Nigeria and the Southern Cameroons. Bull. Geol. Surv. Nigeria no.25. 112 p
  • Robaszynski, F. (1984). The Albian, Cenomanian and Turonian Stages in their type-regions. Bull. geol. Soc. Denmark, vol. 33 pp, 191-198, Copenhagen
  • Robaszynski, F., Caron, M., Dupuis, C., Amédro, F., Gonzalez-Donoso, J.M., Linares, D., Hardenbol, J., Gartner, S., Calandra,F., Deloffre, R. (1990). A tentative integrated stratigraphy in the Turonian of Central Tunisia: formations, zones and sequential stratigraphy in the Kalaat Senan area. Bulletin des Centres de Recherches Exploration-Production Elf Aquitaine. T.14. P.213–384
  • Samuel, M.D., Ismail, A.A., Akarish, A.I.M., & Zaky, A.H. (2009). Upper Cretaceous stratigraphy of the Gebel Somar area, north-central Sinai, Egypt. Cretaceous Research, 30(1), 22–34
  • Strasser, A., Charollais, J., Conrad, M.A., Clavel, B., Pictet, A. & Mastrangelo, B. (2016). The Cretaceous of the Swiss Jura Mountains: an improved lithostratigraphic scheme. Swiss J. Geosci., 7 June 2016 (published online)
  • Wood, C. J., Ernst, G. & Rasemann, G. (1984). The Turonian-Coniacian stage boundary in Lower Saxony (Germany) and adjacent areas: the Salzgitter-Salder Quarry as a proposed international standard section. Bull. geol. Soc. Denmark, vol. 33 pp. 225-238, Copenhagen

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