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See detailPolyphase karst system in Cretaceous chalk and calcarenite of the Belgian-Dutch border
Willems, Luc ULg; Rodet, Joël; Fournier, Matthieu et al

in Zeitschrift für Geomorphologie (2007), 51(3), 361-376

Along the Belgian-Dutch border, underground and surface quarries dug in Cretaceous calcarenite and chalk intersect many karst features as well as deep large nodes of weathered rock. Their observation ... [more ▼]

Along the Belgian-Dutch border, underground and surface quarries dug in Cretaceous calcarenite and chalk intersect many karst features as well as deep large nodes of weathered rock. Their observation allows the reconstruction of the genesis of an original karst system resulting from the merging of initially independent endokarsts and exokarsts. Deep weathering has developed within the Cretaceous formations, creating nodes of weathered chalk and closed cavities. These phenomena are expanded over time and can form interconnected voids. Near the surface, solution pipes are generated under the coarsest deposits of a fluvial terrace capping the Cretaceous formations. These pipes develop vertically and may be related to the progressive lowering of the water table in connection with the incision of the Meuse valley. Some of these phenomena cut up the older endokarsts and organize complex systems of out-flow within the chalk. [less ▲]

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See detailAnalyse de la variabilité spatio-temporelle de la morphologie du chenal de la Warche en amont du barrage de Butgenbach (Belgique).
Assani, A. A.; Petit, François ULg; Buffin-Belanger, T. et al

in Zeitschrift für Geomorphologie (2003)

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See detailStudy of siliceous karst genesis in eastern Niger : microscopy and X ray microanalysis of speleothems
Willems, Luc; Compère, Philippe ULg; Sponholz, Barbara

in Zeitschrift für Geomorphologie (1998), 42

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See detailStudy of siliceous karst genesis in Eastern Niger. Microscopy and analysis of speleothems
Willems, Luc ULg; Compère, Philippe ULg; Sponholz, Barbara

in Zeitschrift für Geomorphologie (1998), 42(2), 129-142

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See detailPhénomènes karstiques en milieux non carbonatés. Etudes de cavités et problématique de leur développement au Niger Occidental
Willems, Luc ULg; Pouclet, André; Lenoir, François et al

in Zeitschrift für Geomorphologie (1996)

The study of several caves in siliceous formations belonging to the Precambrian basement and its Cenozoic sedimentary cover brings to the fore the importante of an underground drainage network in relation ... [more ▼]

The study of several caves in siliceous formations belonging to the Precambrian basement and its Cenozoic sedimentary cover brings to the fore the importante of an underground drainage network in relation with crustal fracturation. This network guides the waler transfer from the land surface to the depth and generates géomorphologic phenomena similar to those in calcareous areas. The study of caves in a siliceous environmemts shows the importance of solution phenomena in their formation and also in that of West Niger landscapes. Therfore, a general model of topographic evolution îs proposed. [less ▲]

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See detailPhénomène influençant la mise en mouvement et le transport des particules en rivières naturelles
Petit, François ULg

in Zeitschrift für Geomorphologie (1988)

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See detailLes surfaces d'érosion crétacique et paléogènes du nord de l'Ardenne-Eifel
Demoulin, Alain ULg

in Zeitschrift für Geomorphologie (1986), 30

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See detailSome analyses of the CO2 content of the air in five Polish caves
Ek, Camille ULg; Gilewska, S.; Kaszowski, L. et al

in Zeitschrift für Geomorphologie (1969), Neue Folge 13(3), 267-286

It is in a cave of the Silesian Upland and in four caves of the Polish Tatra Mts that some fourty analyses of CO2 in air were carried out between the 7 and the 12.4.67. CO2 content is generally very low ... [more ▼]

It is in a cave of the Silesian Upland and in four caves of the Polish Tatra Mts that some fourty analyses of CO2 in air were carried out between the 7 and the 12.4.67. CO2 content is generally very low in the studied caves, sometimes lower than in open air. The lowest figures seem related with low temperatures. [less ▲]

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