Devonian-Carboniferous Boundary global correlations and their paleogeographic implications for the assembly of pangaea.

in Royal Netherlands Academy of Arts and Sciences (2007)

Glaciaçoes neodevonianas E Eocarboniferas na America do sul.

in Simposio da Amazonias (2006)

Apports de la géochimie sédimentaire à l’archéologie - Mise en évidence d’un transport de minerais à l’époque romaine et mérovingienne dans une tourbière belge

Conference (2006)

Late Famennian correlation by miospores between the Refrath 1 Borehole (Bergisch Gladbach-Paffrath Syncline, Germany) and the reference section of Chanxhe (Dinant Syncline, Belgium).

in Carnets de Géologie = Notebooks on Geology (2005), Memoir 2005/02(10),

Premier bilan des analyses récentes du « Pavé de Charlemagne » dans les Hautes-Fagnes à Waimes (Lg.)

in Archaeologia mediaevalis (2005), 28

This is a presention of different methods of archaeology and archaeometry (palynology, dendrochronology, geomorphology) to date and understand the function of this wooden and stone route infrastructure in ... [more ▼]

This is a presention of different methods of archaeology and archaeometry (palynology, dendrochronology, geomorphology) to date and understand the function of this wooden and stone route infrastructure in a wet deep soil environment. This route is probably from the High Middle Age time with a modification dendrodated at the beginning of the 9th century. the descovery of a old wooden car is also described. [less ▲]

La route pavée au travers des tourbières de la fagne des Wez (Via Mansuerisca ?) est –elle romaine ou mérovingienne ? La vérité est-elle …à mi-chemin ?

in Hautes Fagnes (2005), 259

La Via Mansuerisca, première cause de pollution dans les Hautes Fagnes ?

in Miscellanea Faniae (2005), 8

Biochemostratigraphy of the Devonian-Carboniferous boundary Global Stratotype Section and Point, Griotte Formation, La Serre, Montagne Noire, France

in Palaeogeography Palaeoclimatology Palaeoecology (2004), 205(3-4), 337-357

The Griotte Formation and the base of Bed 89 exposed at La Serre, Montagne Noire, France represent the Global Stratotype Section and Point (GSSP) for the Devonian-Carboniferous (D-C) boundary. This study ... [more ▼]

The Griotte Formation and the base of Bed 89 exposed at La Serre, Montagne Noire, France represent the Global Stratotype Section and Point (GSSP) for the Devonian-Carboniferous (D-C) boundary. This study represents the geochemical work on brachiopods and matrix covering the Siphonodella praesulcata to Siphonodella sulcata Zones at the GSSP. Values of Sr-87/Sr-86 of unaltered brachiopods provide the most powerful biochemostratigraphic tool in recognizing and correlating the Devonian-Carboniferous boundary on a global scale. The frequency and variations of the latest Devonian Sr-87/Sr-86 trend (0.708167 +/- 0.000042) are invariant but the population means are similar (p = 1.000) to the essentially pronounced trend for the post-boundary Carboniferous (0.708165 +/- 0.000054) brachiopods from the GSSP and supplementary sections. The Devonian-Carboniferous boundary Sr-87/Sr-86 value based on unaltered brachiopod samples from within 0.2 m of either side of the boundary is 0.708231 +/- 0.000021 (NBS 987 = 0.710240). Oxygen isotope values of unaltered brachiopods from the Devonian side of the boundary are -1.99 +/- 2.29% (PDB) and those from the Carboniferous side are -3.08 +/- 0.51% (PDB, p = 0.229), which are from within to outside the range recorded in Recent low-latitude counterparts. Carbon isotope values for the Devonian brachiopods with +4.37 +/- 1.69% (PDB) are dissimilar to those from the Carboniferous side of the boundary with +1.93 +/- 0.49% (PDB; p = 0.0001), but both mostly overlap with the range observed in Recent low-latitude brachiopods. The large positive excursions in delta(13)C (Delta5.5%) and 8180 (Delta6.9%) of the unaltered brachiopods reflect changing oceanographic conditions of the La Serre Sea and possibly of the global oceans during the uppermost Middle and Upper S. praesulcata Subzones. Oxygen isotope trend may reflect, in part, a climatic response of a rapid, short and distinct glacial event during the upper Middle S. praesulcata Subzone. This cryogenic event of a larger oceanographic/climatic shift correlates, in part, to the Hangenberg Event sensu lato. Excursions in the seawater-Sr-87 bracket the onset and offset of the glacial event, reflecting changes in continental weathering patterns and processes and with it changes in riverine fluxes. In contrast, the carbon isotope shift although related to the cooling trend is probably associated with a drawdown of atmospheric CO2 and/or burial of organic matter. The biochemostratigraphic values/contents and trends presented in this study, in conjunction with biostratigraphic observations, facilitate the correlation of sequences at Hasselbachtal and Wocklum (Germany), Nanbiancun (China) and Starks Road and Hannibal (Missouri, USA). (C) 2004 Elsevier B.V All rights reserved. [less ▲]

Subdivision of the Famennian Stage into four substages and correlation with the neritic and continental Miospore Zonation

in Subcommission on Devonian Stratigraphy Newsletter (2004), 21

Holocene record of atmospheric flux by geochemical and Pb isostopes signatures in a Belgian Hautes Fagnes peat bog: Preliminary results

in Geochimica et Cosmochimica Acta (2004), 68(11), 485-485