A5004320908- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Geological and Geophysical Studies
- Marine Biology and Ecology Research
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Cephalopods and Marine Biology
- Methane Hydrates and Related Phenomena
- Plant Diversity and Evolution
- Geochemistry and Geologic Mapping
- Marine and environmental studies
- Geological formations and processes
- Isotope Analysis in Ecology
- Tree-ring climate responses
- Archaeology and ancient environmental studies
- Geophysics and Gravity Measurements
- Ancient Egypt and Archaeology
- Ancient Near East History
- earthquake and tectonic studies
- Diatoms and Algae Research
- Astro and Planetary Science
University of Lausanne
2011-2021
Terre des Hommes
2014
Geological Survey of Canada
1994
Research Article| May 01, 2010 Correlating the end-Triassic mass extinction and flood basalt volcanism at 100 ka level Blair Schoene; Schoene * † 1Earth Sciences, University of Geneva, Rue des Maraîchers 13, CH-1205 Switzerland *Current address: Geosciences, Guyot Hall, Princeton University, Princeton, New Jersey 08544, USA. Search for other works by this author on: GSW Google Scholar Jean Guex; Guex 2Geology Paleontology, Lausanne, l'Anthropole, †E-mails: bschoene@princeton.edu;...
The end-Permian mass extinction removed more than 80% of marine genera. Ammonoid cephalopods were among the organisms most affected by this crisis. analysis a global diversity data set ammonoid genera covering about 106 million years centered on Permian-Triassic boundary (PTB) shows that Triassic ammonoids actually reached levels higher in Permian less 2 after PTB. favor hierarchical rather logistic model diversification coupled with niche incumbency hypothesis. This explosive and nondelayed...
Research Article| July 01, 2014 Towards accurate numerical calibration of the Late Triassic: High-precision U-Pb geochronology constraints on duration Rhaetian Jörn-Frederik Wotzlaw; Wotzlaw * 1Section Earth and Environmental Sciences, University Geneva, 1201 Switzerland *E-mail: joern.wotzlaw@unige.ch. Search for other works by this author on: GSW Google Scholar Jean Guex; Guex 2Institute Lausanne, 1015 Annachiara Bartolini; Bartolini 3Muséum National d'Histoire Naturelle, 75005 Paris,...
Research Article| January 01, 2001 Radiolarite ages in Alpine-Mediterranean ophiolites: Constraints on the oceanic spreading and Tethys-Atlantic connection Markus Bill; Bill 1Institut de Géologie et Paléontologie, Université Lausanne, BFSH-2, CH-1015 Switzerland Search for other works by this author on: GSW Google Scholar Luis O'Dogherty; O'Dogherty 2Facultad Ciencias del Mar, Universidad Cádiz, 11510 Puerto Real, Spain Jean Guex; Guex 3Institut Peter O. Baumgartner; Baumgartner Henri...
The temporal coincidence between large igneous provinces (LIPs) and mass extinctions has led many to pose a causal relationship the two. However, there is still no consensus on mechanistic model that explains how magmatism leads turnover of terrestrial marine plants, invertebrates vertebrates. Here we present synthesis ammonite biostratigraphy, isotopic data high precision U-Pb zircon dates from Triassic-Jurassic (T-J) Pliensbachian-Toarcian (Pl-To) boundaries demonstrating these biotic...
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Other| August 01, 2001 Evolutionary Rates of Jurassic Ammonites in Relation to Sea-level Fluctuations JOSÉ SANDOVAL; SANDOVAL 1Departamento de Estratigrafía y Paleontología, Universidad Granada, 18071- Spain Search for other works by this author on: GSW Google Scholar LUIS O'DOGHERTY; O'DOGHERTY 2Facultad Ciencias del Mar, Cádiz, 11510- Puerto Real (Cádiz), JEAN GUEX 3Institut Géologie et Paléontologie, BFSH-2, Université Lausanne, CH-1015 Switzerland PALAIOS (2001) 16 (4): 311–335....
Abstract In contrast to the majority of recently published hypotheses, we believe that main trigger for early Toarcian anoxia is neither increased primary productivity during Tenuicostatum and Falciferum Zones nor sudden methane hydrate degassing close transition between these two zones. our opinion, this peculiar paleoceanographic episode linked a major, though short-lived, regression at end Upper Domerian. Sea-level fall resulted from cooling due volcanic activity. This generated global...
This study provides an organic carbon stable isotope ( δ 13 C org ) record calibrated with detailed ammonite biostratigraphy, following the end‐Triassic biological crisis. Precise correlation between this crucial fossil group and is key to understanding feedbacks environmental events mass extinction. The latest Triassic Hettangian shows several negative positive excursions. shift coinciding extinction interval followed by a excursion in earliest Psiloceras spelae beds, which marks onset of...
Abstract The Early Jurassic (late Pliensbachian to early Toarcian) was a period marked by extinctions, climate fluctuations, and oceanic anoxia. Although the causes of Toarcian Oceanic Anoxia Event (OAE) have been fairly well studied, events that lead OAE, i.e. in late Pliensbachian, not constrained. Scenarios driving mechanism biotic environmental changes ranged from LIP volcanism (the Karoo-Ferrar LIP), ocean stagnation, changing circulation, orbital forcing. temporal relationship between...