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See detailQuoi de neuf dans les tourbières des Hautes-Fagnes ? (1ere partie)
Streel, Maurice ULiege; Hindryckx, Marie-Noëlle ULiege; Gerrienne, Philippe ULiege

in Hautes Fagnes (2019), 2019(1), 13-15

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See detailReconstructing Early Atlantic to Early Subatlantic peat-forming conditions of the ombrotrophic Misten Bog (eastern Belgium) on the basis of high-resolution analyses of pollen, testate amoebae and geochemistry
Streel, Maurice ULiege; Paillet, Marc ULiege; Beghin, Jérémie ULiege et al

in Geologica Belgica (2018), 21(3-4),

A seven metres thick peat bog (Misten, Hautes-Fagnes, Belgium) has been studied at high resolution in order to reconstruct the conditions of peat formation and evolution on the basis of pollen, testate ... [more ▼]

A seven metres thick peat bog (Misten, Hautes-Fagnes, Belgium) has been studied at high resolution in order to reconstruct the conditions of peat formation and evolution on the basis of pollen, testate amoebae analysis, and geochemistry. The sampled section of the peat bog corresponds to the most part of the Atlantic period, all the Subboreal period and the earliest Subatlantic period, i.e. a time interval between 7300 cal BP and 2000 cal BP. The identification of tie-points in the pollen assemblages recognized in a previous work (Persch, 1950) performed in the periphery of the same peat-bog, allows accurate correlation of the two sites, 460 cm thickness of peat in the central part corresponding to 230 cm thickness of peat in the periphery. The well constrained dates of the tie-points in the present work provide a more precise chronology of the events identified in Persch’s pollen diagram. A comparison of pollen data in both sites demonstrates that, as expected, the Corylus pollen rain is proportionally more important and the Quercetum mixtum pollen rain proportionally less important in the central area of the peat bog than in the periphery. The study of the testate amoebae in the central part of the peat bog is the major contribution of the present work. A stratigraphically constrained analysis resulted in the identification of five biozones, the zonation being mainly built on the fluctuations observed between Archerella (Amphitrema) flavum and Difflugia pulex. Three transfer functions have been applied and compared. Coupled with the humification values of each level, it allows a very accurate approach of the water-table level, and hence of local climatic conditions, at the time of the peat formation. Combination of pollen results and testate amoebae zonal subdivisions allows the definition, dating and interpretation of 18 rather short time intervals with an approximate duration of 200 to 300 years each. Our results validate and expand a previously published climate interpretation that combined geochemical data and a preliminary testate amoebae analysis. [less ▲]

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See detailFirst spore data of the Upper Devonian Bolloncillos Formation (NE Iberian Peninsula)
Cascales-Miñana, Borja ULiege; Steemans, Philippe ULiege; Rial, G et al

Conference (2017, December 08)

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See detailTourbières d'altitude en Haute Savoie
Streel, Maurice ULiege; David, Fernand; Roche, Emile ULiege et al

Conference (2017, December 08)

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See detailThe origin of CIMP or how to increase international contacts between Paleozoic palynologists during the second part of last century.
Streel, Maurice ULiege

in Commission internationale de la microflore du Paléozoïque CIMP Newsletter (2017), 86

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See detailA Frasnian palynological assemblage from the NE Iberian Chain
Rial, Gonzalo; Cascales-Miñana, Borja ULiege; Gerrienne, Philippe ULiege et al

Poster (2016, July)

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See detailUpdating the correlation Miospores/Conodonts in upper and uppermost Famennian
Streel, Maurice ULiege

in IUGS, Subcommisson Devonian Strata Newsletter (2016), 31

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See detailPleading for a new DCB in the historical German deep facies of Sauerland near Stockum
Streel, Maurice ULiege; Korn, Dieter

in Subcommission on Devonian Stratigraphy Newsletter (2016), 31

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See detailL'extinction de Sphagnum austinii en Belgique
Vanderpoorten, Alain ULiege; Sottiaux, André; Streel, Maurice ULiege

in Natura Mosana (2016), 69(1/2), 91-95

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See detailDes remparts de viviers revisités
Juvigné, Etienne ULiege; Damblon, Freddy ULiege; Streel, Maurice ULiege

in Hautes Fagnes (2015), 2015(298), 20-23

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See detailRaymond Bouillenne, personnalité attachante et créative des sciences naturelles en Belgique et en Afrique tropicale
Sironval, Cyrille; Streel, Maurice ULiege

in Natura Mosana (2015), 68((1)), 23-26

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See detailReconstructing historical atmospheric mercury deposition in Western Europe using: Misten peat bog cores, Belgium
Allan, Mohammed ULiege; Le Roux, Gael; Sonke, Jeroen et al

in 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 ▲]

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See detailNew high-resolution pollen record from Hautes-Fagnes Belgium
Danu, M; Streel, Maurice ULiege; Allan, Mohammed ULiege et al

in Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology (2013), 59(1), 15-25

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