Showing results 1 to 20 of 249
  What do latest Famennian and Misissippian miospores from South American diamictites tell us?Streel, Maurice  ; ; et alin Palaeobiodiversity and Palaeoenvironments (in press) Detailed reference viewed: 41 (8 ULg) Reconstructing historical atmospheric mercury deposition in Western Europe using: Misten peat bog cores, BelgiumAllan, Mouhamd ; ; et alin Science of the Total Environment (2013), 442 Four sediment cores were collected in 2008 from the Misten ombrotrophic peat bog in the Northern part of the Hautes Fagnes Plateau in Belgium. Total mercury (Hg) concentrations were analyzed to ... [more ▼] Four sediment cores were collected in 2008 from the Misten ombrotrophic peat bog in the Northern part of the Hautes Fagnes Plateau in Belgium. Total mercury (Hg) concentrations were analyzed to investigate the intra-site variability in atmospheric Hg deposition over the past 1500 years. Mercury concentrations in the four cores ranged from 16 to 1100 μg kg− 1, with the maxima between 840 and 1100 μg kg− 1. A chronological framework was established using radiometric 210Pb and 14C dating of two cores (M1 and M4). Pollen horizons from these two cores were correlated with data from two additional cores, providing a consistent dating framework between all the sites. There was good agreement between atmospheric Hg accumulation rates in the four cores over time based on precise age dating and pollen chronosequences. The average Hg accumulation rate before the influence of human activities (from 500 to 1300 AD) was 1.8 ± 1 μg m− 2 y− 1 (2SD). Maximum Hg accumulation rates ranged from 90 to 200 μg m− 2 y− 1 between 1930 and 1980 AD. During the European–North American Industrial Revolution, the mean Hg accumulation rate exceeded the pre-Industrial values by a factor of 63. Based on comparisons with historical records of anthropogenic activities in Europe and Belgium, the predominant regional anthropogenic sources of Hg during and after the Industrial Revolution were coal burning and smelter Hg emissions. Mercury accumulation rates and chronologies in the Misten cores were consistent with those reported for other European peat records. [less ▲] Detailed reference viewed: 80 (32 ULg)A climate model from 200 AD to 1200 AD for the Hautes-Fagnes plateau (East Belgium) : based on pollen grains, testate amoebae, and humification analysesBeghin, Jérémie ; Fagel, Nathalie ; Gerrienne, Philippe et alPoster (2012, September 12) Several peat cores were extracted from the Misten bog, on the Hautes-Fagnes plateau (East Belgium). Analyses of pollen grains, testate amoebae and the degree of peat humification have been standardised ... [more ▼] Several peat cores were extracted from the Misten bog, on the Hautes-Fagnes plateau (East Belgium). Analyses of pollen grains, testate amoebae and the degree of peat humification have been standardised and combined into a palaeo-hydro-climatic model from 200 AD to 1200 AD. The reconstruction shows 9 distinctive phases of near-surface water tables, which may be used to infer changes in the atmospheric water balance of eastern Belgium during the Subatlantic stage. [less ▲] Detailed reference viewed: 31 (13 ULg)A climate model from 80 AD to 1350 AD for the Hautes Fagnes plateau (Belgium), based on pollen grains, testate amoebae and humification analyses. Application of the model to Subatlantic palaeolandslides in the Pays de Herve (eastern Belgium).; Demoulin, Alain ; Gerrienne, Philippe et alConference (2012, March 01) Detailed reference viewed: 16 (4 ULg)The biostratigraphical distribution of earliest tetrapods (Late Devonian): a revised version with comments on biodiversification; ; Streel, Maurice in Special Publication - Geological Society of London (2010), 339 Detailed reference viewed: 11 (0 ULg)Recherche d’intérêt général et pluridisciplinaire relative aux modalités de l’accumulation récente de la tourbe dans la tourbière ombrogène du Misten (Hautes-Fagnes) en relation avec les changements climatiques et les effets des activités humaines,; ; Streel, Maurice et alReport (2010) Detailed reference viewed: 16 (8 ULg)Spatio-temporal natural and anthropogenic environmental variability during the last 1500yrs in an ombrotrophic bog (East Belgium).; Fagel, Nathalie ; et alPoster (2010) Detailed reference viewed: 11 (5 ULg)Multiproxy, multicore palaeoenvironmental study during the last millennium in the Misten peat bog (Hautes Fagnes, East Belgium).; Fagel, Nathalie ; et alConference (2010) Detailed reference viewed: 27 (6 ULg) Climatic and anthropogenic palaeoenvironmental changes over the last 1500 years in Hautes-Fagnes (East Belgium): the high-resolution multiproxy record of the Misten peat bog; Streel, Maurice ; et alConference (2010) Detailed reference viewed: 51 (14 ULg)Multiproxy, multicore palaeoenvironmental study during the last millennium in the Misten peat bog (Hautes Fagnes, East Belgium).; Fagel, Nathalie ; et alPoster (2010) Detailed reference viewed: 42 (13 ULg)Upper Devonian miospore and conodont correlation in western EuropeStreel, Maurice in Special Publication - Geological Society of London (2009), 314 Detailed reference viewed: 8 (0 ULg)West Gondwanan and Euramerican climate impact on Famennian miospore assemblagesStreel, Maurice in Subcommission on Devonian Stratigraphy Newsletter (2008), 23 Detailed reference viewed: 10 (1 ULg)Palynostratigraphy and environment of "Strunian" and Visean diamictites from South America (Western Gondwana)Streel, Maurice in Terra Nostra (2008), 2 Detailed reference viewed: 6 (0 ULg)Recent palynological data in the Hautes-Fagnes, BelgiumStreel, Maurice ; Damblon, Freddy Conference (2008) Detailed reference viewed: 9 (1 ULg)Late Devonian and Early Carboniferous glacial records of South America; ; Streel, Maurice et alin Special Papers (Geological Society of America) (2008), 441 Detailed reference viewed: 8 (0 ULg)Upper and uppermost Famennian miospore and conodont correlation in the Ardenne-Rhenisch areaStreel, Maurice in Subcommission on Devonian Stratigraphy Newsletter (2008), 23 Detailed reference viewed: 3 (0 ULg)Roman road pollution assessed by elemental and lead isotope geochemistry in East Belgium; Fagel, Nathalie ; et alin Applied Geochemistry (2008), 23(12), 3253-3266 The ability of inorganic geochemistry to record environmental change and especially human impact has been evidenced by several studies across Europe, especially in peat, where it is possible to record the ... [more ▼] The ability of inorganic geochemistry to record environmental change and especially human impact has been evidenced by several studies across Europe, especially in peat, where it is possible to record the impact of agriculture, mining and other industries. However, despite the numerous investigations on the impact of ancient human activities such as ore mining and smelting, little attention has been paid to geochemistry as a tool to solve problems of palaeopollution in the surroundings of archaeological sites. This paper presents geochemical evidence of the impact of a possible early Roman road built in SE Belgian peatland. Increased Zn and Pb concentrations suggest that Pb-Zn ores were transported on the road, Lead isotope analyses suggest that these ores are locally derived, being compatible with those found in the nearby Pb-Zn ore deposits from East Belgium. Present results provide direct evidence that East Belgian Pb-Zn ores were already being mined during Roman times, i.e. earlier than previously suspected (i.e. 14th century) and that Zn appears to be relatively immobile here. On a broader scale, it also demonstrates that such an early road already had an impact on the environment in terms of metal pollution. This paper enlarges on the range of possibilities offered by geochemistry in the field of geoarchaeology. (C) 2008 Elsevier Ltd. All rights reserved. [less ▲] Detailed reference viewed: 49 (4 ULg)Strud: Old quarry, new discoveries. Preliminary report.Prestianni, Cyrille ; Streel, Maurice ; Thorez, Jacques et alin Carnets de Géologie = Notebooks on Geology (2007), 2007(01), 43-47 Detailed reference viewed: 7 (3 ULg)Givetian megaspores from Libya and BelgiumSteemans, Philippe ; ; Gerrienne, Philippe et alConference (2007) Detailed reference viewed: 1 (0 ULg)Middle Devonian (Givetian) megaspores from Belgium (Ronquières) and Libya (A1-69 borehole); ; Gerrienne, Philippe et alin Carnets de Géologie = Notebooks on Geology (2007), CG2007(M01/02), 68-73 Preliminary results are presented on newly discovered megaspore assemblages recovered from Givetian localities at Ronquières, Belgium, and a borehole (A1-69) drilled in the Ghadames Basin, Libya, by SHELL ... [more ▼] Preliminary results are presented on newly discovered megaspore assemblages recovered from Givetian localities at Ronquières, Belgium, and a borehole (A1-69) drilled in the Ghadames Basin, Libya, by SHELL in 1959. The miospore biostratigraphy of the Ronquières and of A1-69 borehole sections has been published (Ville de Goyet, 2005; Gerrienne et alii, 2004; Loboziak & Streel, 1989; Loboziak et alii, 1992; Streel et alii, 1990). [less ▲] Detailed reference viewed: 64 (11 ULg) |
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