In: Palaeogeography, Palaeoclimatology, Palaeoecology, 2006, vol. 235, p. 245-264
In the uppermost Hauterivian sediments of the western Tethys, a short-lived anoxic event (Faraoni event) is documented both in the form of an interval enriched in organic matter (pelagic realm) and in a condensed interval enriched in glauconite and phosphate (shelf realm). This latter interval represents the onset of a drowning episode on the Helvetic carbonate platform along the northern tethyan...
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In: Comptes Rendus Geosciences, 2006, vol. 338, no. 10, p. 727-733
The Chopf Member is a glauconitic, phosphate-bearing succession that occurs in the distal part of the Helvetic Alps (eastern Switzerland). The recent discovery of age-diagnostic ammonites within this horizon allows for its attribution to the lower part of the Gerhardtia sartousiana zone (middle Late Barremian). This new age corresponds to a maximal age for the onset of the Schrattenkalk Fm. in...
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In: International Journal of Earth Sciences, 2007, vol. 96, no. 2, p. 327-341
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In: Eclogae Geologicae Helvetiae, 2006, vol. 99, no. 2, p. 157-174
During the Early Cretaceous, major palaeoceanographic changes are mirrored on the northern Tethyan carbonate platform by changes in the carbonate factory and by platform drowning. The Altmann Member of the central European, northern Alpine Helvetic thrust and fold belt, contains the sedimentary record of one of these drowning events which occurred during the Late Hauterivian – Early Barremian....
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Thèse de doctorat : Université de Neuchâtel, 2006 ; 1901.
The goal of this PhD study was to decipher the mechanisms responsible for changes in the carbonate platform factory accompanied by incipient drowning. For this purpose, a peculiar condensed level called the Altmann Member, which recorded the northern Tethyan margin drowning during the latest Hauterivian – Early Barremian, and which is now locked up in the Helvetic realm, was studied. Indeed,...
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In: International Journal of Earth Sciences, 2007, vol. 96, no. 2, p. 327-341
The Faraoni Level is a short-lived oxygen-deficient event that took place during the latest Hauterivian. In order to improve our understanding of the palaeoenvironmental conditions that occurred during this event, we have analysed the contents of several redox-sensitive trace elements (U, V, Mo, As, Co, Cd, Cu, Zn, Ni, Pb, Cr) from bulk limestone samples of late Hauterivian–early Barremian age...
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In: Swiss Journal of Geosciences, 2007, vol. 100, no. 3, p. 349-369
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In: Paleoceanography, 2006, vol. 21, no. PA4211, p. 1-16
The evolution of the Early Cretaceous, northern Tethyan carbonate platform was not only influenced by changes in sea level, detrital influx, and surface water temperature but also by changes in trophic levels. We distinguish between phases of carbonate production dominated by oligotrophic photozoan communities and by mesotrophic and eventually colder-water heterozoan communities. Superimposed on...
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In: Earth and Planetary Science Letters, 2006, vol. 242, p. 254-271
In order to improve our understanding of the relationships between the late Hauterivian oceanic anoxic Faraoni event, contemporaneous platform drowning along the northern Tethyan margin and global environmental change in general, we established high-resolution δ13C and δ18O curves for the late Hauterivian and the entire Barremian stage. These data were obtained from whole-rock carbonate samples...
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In: Cretaceous Research, 2008, vol. 29, no. 5-6, p. 830-847
High-resolution clay-mineral analyses were performed on upper Hauterivian to lower Aptian sediments along a platform-to-basin transect through the northern Tethyan margin from the Neuchâtel area (Switzerland), to the Vocontian Trough (France) in order to investigate links between climate change, carbonate platform evolution, and fractionation patterns in clay minerals during their transport....
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