In: Palaeogeography, Palaeoclimatology, Palaeoecology, 2009, vol. 278, no. 1-4, p. 1-23
High-diversity marine biotic communities characterize the lower Kasimovian (Upper Pennsylvanian) carbonates of the Las Llacerias Formation in the Ándara Massif (Picos de Europa Province, Cantabrian Mountains, Spain). The carbonates accumulated on a small thrust-top ramp system. Within the shallow, low-energy and euphotic realms, biotic communities were characterized by abundant photozoans...
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In: The Journal of Foraminiferal Research, 2009, vol. 39, no. 2, p. 126-137
Based on examination of the type material deposited by Jacques Sigal at the Musée National d’Histoire Naturelle in Paris, we have validated the hypothesis of Randrianasolo and Anglada (1998) that the holotype and paratype of Ticinella bejaouaensis Sigal 1966 belong to two different species, the distributions of which do not overlap. Indeed, the holotype is of late Albian age and from...
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In: Earth-Science Reviews, 2009, vol. 94, no. 1-4, p. 98-100
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In: The Journal of Foraminiferal Research, 2009, vol. 39, no. 2, p. 112-119
The Oligocene–Miocene transition is characterized by a low degree of biotic turnover (extinction plus origination) in many microfossil groups and especially in planktonic foraminifera. Few species appear, evolve, and disappear across this boundary, and the existence of transitional forms between key species makes biostratigraphic resolution of the boundary interval difficult. The boundary is...
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In: Ichnos, 2009, vol. 16, no. 1-2, p. 127 - 142
his study concerns the formation, taphonomy, and preservation of human footprints in microbial mats of present-day tidal-flat environments. Due to differences in water content and nature of the microbial mats and the underlying sediment, a wide range of footprint morphologies was produced by the same trackmaker. Most true tracks are subjected to modification due to taphonomic processes, leading...
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In: Actes du 12e Congrès suisse de Spéléologie, 2007, p. 148-154.
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In: Earth-Science Reviews, 2009, vol. 92, no. 1-2, p. 1-33
Sequence stratigraphy emphasizes facies relationships and stratal architecture within a chronological framework. Despite its wide use, sequence stratigraphy has yet to be included in any stratigraphic code or guide. This lack of standardization reflects the existence of competing approaches (or models) and confusing or even conflicting terminology. Standardization of sequence stratigraphy...
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In: Palaios, 2008, vol. 23, no. 8, p. 548-558
The Kimmeridgian shallow-water carbonates of the Swiss Jura Mountains display stratigraphic levels containing mass accumulations of nerineoidean gastropods. The macro- and microfacies of the rocks with these nerineoidean assemblages suggest that their occurrence was related to water depth, physical energy within the habitat, sedimentation rate, substrate stability, and food supply. Typical...
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In: Geochemistry Geophysics Geosystems, 2007, vol. 8, p. Q01003
In situ measurement of Li isotope ratios in foraminifera has been developed using a Cameca ims 1270 ion microprobe. In situ δ⁷Li analyses have been performed in biogenic calcite of planktonic foraminifera from various locations. Results show that for west Pacific mixed Globigerinoides and Globorotalia (22°S161°E), the isotopic variability between tests and within a...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1395.
Slope instabilities such as mudflows, debris flows or landslides have lately raised much concern in Switzerland, since various major events have occurred during the last decade, resulting in major landscape disturbances, as well as costly damage to infrastructure. This demonstrated the necessity to better understand the causes and dynamics of such processes. This research work aims at defining...
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