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Université de Fribourg

Sedimentary record of arc-continent collision along mesozoic SW north america (Siuna belt, Nicaragua)

Andjić, Goran ; Escuder‐Viruete, Javier ; Baumgartner‐Mora, Claudia ; Baumgartner, Peter O. ; Mitchell, Simon F. ; Caron, Michèle ; Caus, Esmeralda

In: Tectonics, 2019, vol. 38, no. 12, p. 4399–4425

The western margin of the Caribbean Plate is a typical example where oceanic and continental terranes have amalgamated by subduction, collision, and strike‐slip processes. The boundaries between these blocks, as well as their tectonostratigraphic records, are generally covered by younger deposits and dense tropical vegetation, which may hamper reconstructing the accretionary evolution of...

Université de Fribourg

Age and synchronicity of planktonic foraminiferal bioevents across the Cenomanian – Turonian boundary interval (Late Cretaceous)

Falzoni, Francesca ; Petrizzo, Maria Rose ; Caron, Michèle ; Leckie, R. Mark ; Elderbak, Khalifa

In: Newsletters on Stratigraphy, 2018, vol. 51, no. 3, p. 343–380

The upper Cenomanian – lower Turonian is a key-stratigraphic interval, as it encompasses the Late Cretaceous supergreenhouse and a major perturbation of the global carbon cycle (i. e., Oceanic Anoxic Event 2) as evidenced by a global positive carbon isotope excursion and by the nearly world-wide deposition of organic-rich marine facies. A turnover in planktonic foraminiferal assemblages and...

Université de Fribourg

Remarks on the identification of the Albian/Cenomanian boundary and taxonomic clarification of the planktonic foraminifera index species globotruncanoides, brotzeni and tehamaensis

Petrizzo, Maria Rose ; Caron, Michèle ; Silva, Isabella Premoli

In: Geological Magazine, 2015, vol. 152, no. 3, p. 521-536

The planktonic foraminifera assemblage across the Global Boundary Stratotype Section and Point (GSSP) for the base of the Cenomanian Stage defined at Mont Risou (Haute-Alpes in France) is here restudied to clarify the identification and stratigraphic distribution of Thalmanninella globotruncanoides ( = Rotalipora globotruncanoides Sigal, 1948) and Pseudothalmanninella tehamaensis ( =...

Université de Fribourg

Contribution to the understanding of the Ionian Basin sedimentary evolution along the eastern edge of Apulia during the Late Cretaceous in Albania

Le Goff, J. ; Cerepi, A. ; Swennen, R. ; Loisy, C. ; Caron, Michèle ; Muska, K. ; Desouky, H. El

In: Sedimentary Geology, 2015, vol. 317, p. 87–101

Integrated in the peri-Adriatic domain, the Ionian Basin extended along a NW-SE direction during the Late Cretaceous, limited on its sides by the Apulian and the Kruja platforms. The basinal/slope succession was studied in seven outcrops exposed in the Albanian fold-and-thrust belt. Sedimentological investigations, supported by bio- and chronostratigraphy were performed on calcareous Upper...

Université de Fribourg

The global bio-events at the Cenomanian-Turonian transition in the reduced Bahloul Formation of Bou Ghanem (central Tunisia)

Robaszynski, Francis ; Zagrarni, Mohamed Faouzi ; Caron, Michèle ; Amédro, Francis

In: Cretaceous Research, 2010, vol. 31, no. 1, p. 1-15

In central Tunisia, the thickness of the Bahloul Formation varies generally between 20 to 40 m such as for example, respectively, at wadi Smara near Kalaat Senan and at wadi Bahloul near Maktar. The thickness is also of several tens metres at Koudiat el Azreg near Jerissa and at Tajerouine. In these sites where the thickness of the Bahloul Formation is dilated, in addition to five geochemical...

Université de Fribourg

Revision of the planktonic foraminifera Pseudothalmanninella klausi (LEHMANN, 1966) and Globotruncanella semsalensis (CORMINBOEUF, 1961) and first scanning electron microscope (SEM) images of the holotypes

Spezzaferri, Silvia ; Caron, Michèle

In: Revue de Paléobiologie, 2008, vol. 27, no. 1, p. 81-88

The planktonic foraminifera Rotalipora klausi Lehmann, 1966 and Globotruncana? semsalensis Corminboeuf, 1961, were figuredonly by drawings and the specimens were never made publicly available, although deposited in the collections of the Departmentof Geosciences, Fribourg, Switzerland. We present here for the first time their Scanning Electron Microscope documentation andcomparison with the...

Université de Fribourg

Dicarinella imbricata (Mornod 1949): First SEM documentation of the lost holotype and foraminiferal assemblage from the type horizon (Upper Cretaceous, Switzerland)

Caron, Michèle ; Spezzaferri, Silvia

In: Eclogae Geologicae Helvetiae, 2006, vol. 99, no. 3, p. 295-299

L’espèce de foraminifère Dicarinella imbricata, du Crétacé supérieur de Suisse, a été décrite par L. Mornod en 1949. L’holotype a été figuré seulement par des dessins de l’auteur, et l’holotype n’a jamais été déposé dans le domaine public. Comme l’holotype manquait depuis longtemps, il a été considéré comme perdu et un néotype a été créé. Cependant,...

Université de Fribourg

High-resolution stratigraphy of the Cenomanian–Turonian boundary interval at Pueblo (USA) and wadi Bahloul (Tunisia): stable isotope and bio-events correlation = Stratigraphie à haute résolution de la limite Cénomanien–Turonien sur les coupes de Pueblo (États-Unis) et de l'Oued Bahloul (Tunisie) : isotopes stables et corrélation des événements biologiques

Caron, Michèle ; Dall’Agnolo, Stephan ; Accarie, Hugues ; Barrera, Enriqueta ; Kauffman, Erle G. ; Amédro, Francis ; Robaszynski, Francis

In: Geobios, 2006, vol. 39, no. 2, p. 171-200

Une stratigraphie à haute résolution, pour l'intervalle de passage du Cénomanien au Turonien, a été établie sur la base de niveaux-repères correspondant à plusieurs événements lithologiques, biologiques et géochimiques.Deux sites représentatifs de cette période à l'échelle globale ont été sélectionnés pour la richesse de leur enregistrement sédimentaire et pour le...

Université de Fribourg

La limite Cénomanien-Turonien dans le Haut Atlas central, Maroc = The Cenomanian-Turonian boundary in the Central High Atlas, Morocco

Ettachfini, El Mostafa ; Souhel, Abdellatif ; Andreu, Bernard ; Caron, Michèle

In: Geobios, 2005, vol. 38, no. 1, p. 57-68

Sur la bordure nord du Haut Atlas central, de nouvelles observations lithologiques et biostratigraphiques effectuées en particulier dans le synclinal de Naour, permettent de cerner avec précision la limite Cénomanien-Turonien. La reconnaissance dans cette structure d'une succession apparemment complète de l'intervalle Cénomanien supérieur-Turonien, la série de Ben Cherrou, nous incite à...

Université de Fribourg

The Aptian, Albian and Cenomanian of Roter Sattel, Romandes Prealps, Switzerland: a high-resolution record of oceanographic changes

Strasser, André ; Caron, Michèle ; Gjermeni, Maksim

In: Cretaceous Research, 2001, vol. 22 (2), p. 173

The Aptian–Lower Turonian hemipelagic sediments of Roter Sattel in the Swiss Prealps are well dated by planktonic foraminifera. Stacking pattern of the limestone-marl alternations and facies evolution allow the identification of sequence boundaries, transgressive surfaces, and maximum-flooding events or condensed sections on at least two hierarchical levels. Calibrated by a precise...