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See detailThe astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)
De Vleeschouwer, David; Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg et al

in Special Publication - Geological Society of London (2014), 414

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth’s ... [more ▼]

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth’s system. However, no radiometric ages are contained within the Givetian. Consequently, the absolute ages of the Givetian Stage boundaries, as well as the stage’s duration, remain poorly constrained. As an alternative, the analysis of sedimentary cycles allows for the estimation of the duration of this stage. We examined the high-resolution magnetic susceptibility signals of four Givetian outcrops in the Givet area for a possible astronomical imprint, to fully understand the rates of evolutionary and environmental change. All four sections are firmly correlated and wavelet analyses of the magnetic susceptibility signals reveal the imprint of astronomical eccentricity forcing. The highly stable 405 kyr cycles constrain the duration of the Givetian Stage at 4.35+0.45 Myr, which is in good agreement with the International Chronostratigraphic Chart (5.0 Myr). The studied sections also exhibit an imprint of obliquity, suggesting a climatic teleconnection between low and high latitudes. The corresponding microfacies curves demonstrate similar astronomical imprint, and thereby indicate that the observed 10 5year-scale cyclicity is the result of climatic and environmental change [less ▲]

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See detailFrom meteorites to evolution and habitability of planets
Dehant, Véronique; Breuer, Doris; Claeys, Philippe et al

in Planetary and Space Science (2012)

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See detailPrecessional and half-precessional climate forcing of Mid-Devonian monsoon-like dynamics
De Vleeschouwer, David; Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg et al

in Climate of the Past (2012), 8

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See detailCyclostratigraphic implications of Devonian-climate astronomical forcing.
De Vleeschouwer, David; Da Silva, Anne-Christine ULg; Boulvain, Frédéric ULg et al

in Geological Society of America Abstracts with Programs (2010), 42(5), 540

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See detailAstrobiologie cours-conférence du Collège Belgique (ARB)
Javaux, Emmanuelle ULg; Wilmotte, Annick ULg; Claeys, Philippe et al

Learning material (2009)

cours enregistrés sur le site de l'ARB (http://www.academieroyale.be/)

Detailed reference viewed: 39 (9 ULg)
See detailAstrobiologie
Javaux, Emmanuelle ULg; Claeys, Philippe; Dehant, Véronique et al

Learning material (2008)

powerpoint sur MyULg, notes partielles imprimées

Detailed reference viewed: 44 (11 ULg)
See detailAstrobiology and Habitability, FNRS contact group workshop, Abstracts and Program, June 12th 2007 Royal Academy of Sciences, Brussels.
Javaux, Emmanuelle ULg; Dehant, Véronique; Claeys, Philippe

Book (2007)

Astrobiology and Habitability, FNRS contact group workshop, Abstracts and Program, June 12th Royal Academy of Sciences, Brussels.

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