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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 detailPalaeogeographic and palaeoclimatic considerations based on Ordovician to Lochkovian vegetation
Steemans, Philippe ULg; Wellman, C.H.; Gerrienne, Philippe ULg

in Special Publication - Geological Society of London (2010), 339

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See detailThe biostratigraphical distribution of earliest tetrapods (Late Devonian): a revised version with comments on biodiversification
Blieck, A; Clement, G; Streel, Maurice ULg

in Special Publication - Geological Society of London (2010), 339

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See detailFirst record of Rellimia Leclercq & Bonamo (Aneurophytales) from Gondwana, with comments on the earliest lignophytes.
Gerrienne, Philippe ULg; Meyer-Berthaud, Brigitte; Lardeux, Hubert et al

in Special Publication - Geological Society of London (2010), 339

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See detailEarly seed plant radiation : an ecological hypothesis.
Prestianni, Cyrille ULg; Gerrienne, Philippe ULg

in Special Publication - Geological Society of London (2010), 339

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See detailUpper Devonian miospore and conodont correlation in western Europe
Streel, Maurice ULg

in Special Publication - Geological Society of London (2009), 314

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See detailThe biostratigraphical and palaeogeographic framework of the earliest diversification of Tetrapods (Late Devonian)
Blieck, A; Clement, G; Blom, H et al

in Special Publication - Geological Society of London (2007), 278

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See detailNeotectonic implications of a lineament-coplanarity analysis in Southern Calabria, Italy
Cornet, Yves ULg; Demoulin, Alain ULg

in Special Publication - Geological Society of London (1998), 146

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See detailFinite element modelling of the competition between shear bands in the early stage of thrusting : Strain localisation and constitutive law influence
Barnichon, Jean-Dominique; Charlier, Robert ULg

in Special Publication - Geological Society of London (1996), 99

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See detailGivetian-Frasnian phytogeography of Euramerica and Western Gondwana based on Miospore distribution.
Streel, Maurice ULg; Fairon-Demaret, M; Loboziak, S

in Special Publication - Geological Society of London (1990), 12

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