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See detailIntroduction à la géologie du site de la Heid des Gattes à Sougné-Remouchamps (province de Liège, Belgique)
Mottequin, Bernard ULg; Marion, Jean-Marc ULg

Diverse speeche and writing (2012)

Introduction to the geology of the Heid des Gattes at Sougné-Remouchamps (Liège province, Belgium) where the Famenne, Esneux, Souverain-Pré, Comblain-la-Tour, Montfort and Evieux formations (Upper ... [more ▼]

Introduction to the geology of the Heid des Gattes at Sougné-Remouchamps (Liège province, Belgium) where the Famenne, Esneux, Souverain-Pré, Comblain-la-Tour, Montfort and Evieux formations (Upper Devonian, Famennian) are exposed. [less ▲]

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See detailRedéfinition des unités structurales du front varisque utilisées dans le cadre de la nouvelle Carte géologique de Wallonie (Belgique)
Belanger, Isabelle; Delaby, Serge; Delcambre, Bernard et al

in Geologica Belgica (2012), 15(3), 169-175

The new geological map of Wallonia permits to obtain a more global view of the tectonic organization of the Palaeozoic terrains around the Variscan Front in southern Belgium. This zone oriented WSW-ENE ... [more ▼]

The new geological map of Wallonia permits to obtain a more global view of the tectonic organization of the Palaeozoic terrains around the Variscan Front in southern Belgium. This zone oriented WSW-ENE and passing south of an axis Charleroi-Namur, was firstly highlighted by the coal mining works, but has been significantly documented notably through deep boreholes and seismic profiles. A coherent structural sketch of the Variscan Front is proposed for its entire longitudinal course, where the following structural units are distinguished, from north to south: the Brabant Massif and the base of the cover unaffected by the Variscan orogeny, the Brabant Parautochthon, the Haine-Sambre-Meuse Overturned Thrust sheets (HSM-OTS) and the Ardenne Allochthon. Undeformed terrains during Variscan event constitute the northern border of the Variscan Front. The Brabant Parautochthon includes Devono-Carboniferous terrains, which are folded and faulted. The HSM-OTS are formed by the superposition of several sheets (e.g. La Tombe sheet), which are supported by various thrust faults (e.g. Masse fault). The Ardenne Allochthon, which has been displaced during the Variscan orogeny, rests on the Brabant Parautochthon and the HSM-OTS through a faulted zone, which is locally known as the Midi Fault. [less ▲]

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See detailBiochemostratigraphy of the upper Frasnian in the Namur–Dinant Basin, Belgium: Implications for a global Frasnian–Famennian pre-event
Azmy, Karem; Poty, Edouard; Mottequin, Bernard ULg

in Palaeogeography, Palaeoclimatology, Palaeoecology (2012), 313-314

The Upper Frasnian sequence of the Namur–Dinant Basin in southern Belgium consists of mixed siliclastic–carbonate succession of a ramp setting, where the sequence spans the rhenana–linguiformis conodont ... [more ▼]

The Upper Frasnian sequence of the Namur–Dinant Basin in southern Belgium consists of mixed siliclastic–carbonate succession of a ramp setting, where the sequence spans the rhenana–linguiformis conodont zones. Earlier studies investigated the chemostratigraphic variations during the Frasnian-Famennian event, but little has been yet known about the nature of the counterpart variations that immediately preceded that time interval. Despite the scarcity of well-preserved brachiopods, sixty–one calcitic shells were collected mainly from beds of the Neuville and Les Valisettes formations (Lower and Upper rhenana zones), to investigate biochemostratigraphic profiles of oxygen-, carbon-isotope and rare earth element (REE) variations of the time interval immediately before the Frasnian-Famennian boundary. The δ18O and δ13 C values of the well-preserved shells range from − 9.5 to − 5.6 ‰ VPDB (− 7.7 ± 1.1, n = 33) and from − 1.8 to 3.8 ‰ VPDB (1.1 ± 1.7, n = 33), respectively, which are within the documented global values. The C- and O-isotope profiles exhibit parallel shifts, particularly at the top of the Neuville Formation (top of the Lower rhenana Zone), which are associated with a sea-level rise and shrinkage in the brachiopod community. Also, the Th/U (0.9 ± 0.6, n = 16) and Ce/Ce* (2.2 ± 0.5, n = 16) ratios suggest deposition under reducing conditions consistent with sea transgression. [less ▲]

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See detailA new representative of the lichid genus Ohleum (Trilobita) from the Eifelian (Middle Devonian) of southern Belgium
Taghon, Peter; Bonino, Enrico; Mottequin, Bernard ULg

in Geologica Belgica (2012), 15(3), 120-125

Trilobites of the family Lichidae are relatively poorly diversified within the Eifelian mixed siliciclastic-carbonate succession of the southern margin of the Dinant Synclinorium (Belgium). Until now ... [more ▼]

Trilobites of the family Lichidae are relatively poorly diversified within the Eifelian mixed siliciclastic-carbonate succession of the southern margin of the Dinant Synclinorium (Belgium). Until now, they were only represented by species belonging to the genera Ceratarges and Eifliarges. The recent discovery of a well-preserved specimen within the Eifelian-aged Jemelle Formation in the Couvin area led us to propose the first detailed description of a representative of the genus Ohleum (Ohleum magreani sp. nov.) in the Ardennes. [less ▲]

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See detailApplications of the new geological map of Wallonia
Marion, Jean-Marc ULg; Mottequin, Bernard ULg

Conference (2011, October 14)

The new geological cartography campaign of the Walloon Region, which has begun in 1990, is mainly based on recent field data. Each map is published on 1:25,000 scale and is accompanied by a explanatory ... [more ▼]

The new geological cartography campaign of the Walloon Region, which has begun in 1990, is mainly based on recent field data. Each map is published on 1:25,000 scale and is accompanied by a explanatory booklet where lithostratigraphy, tectonics, hydrogeology and mineral resources are described. These maps are very useful in every human activity involving the knowledge of the underground such as mining, management of dumpsites, civil engineering, etc. [less ▲]

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See detailLes géosites d'Ampsin et d'Engis (Belgique) : deux exemples de reconversion de carrières désaffectées
Barchy, Laurent; Chevalier, Emmanuel; Marion, Jean-Marc ULg et al

in Blieck, A.; Auguste, P.; Derycke, C. (Eds.) Programme et résumés (2011, October)

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See detailLa nouvelle carte géologique de Wallonie et ses applications
Belanger, Isabelle; Blockmans, Sabine; Delaby, Serge et al

in Blieck, A.; Auguste, P.; Derycke, C. (Eds.) Programme et résumés (2011, October)

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See detailContexte géologique et structural de la région de Rochefort (Synclinorium de Dinant, Belgique)
Marion, Jean-Marc ULg; Mottequin, Bernard ULg; Barchy, Laurent et al

in Geological Survey of Belgium, Profesional Paper (2011), 2011/2(309), 27-38

Realised in the framework of the program “Revision of geological maps of Wallonia” the new geological maps “Rochefort - Nassogne” and “Houyet - Han sur Lesse” have formed the basis for this note. They ... [more ▼]

Realised in the framework of the program “Revision of geological maps of Wallonia” the new geological maps “Rochefort - Nassogne” and “Houyet - Han sur Lesse” have formed the basis for this note. They represent a synthesis and the update of geological knowledge gained since the previous edition (1900), both in terms of lithostratigraphy and tectonics. The identification, exploration and mapping of various rock units in this part of the Dinant Syncline have led several generations of geologists to identify the structural grain of the region. The main tectonic elements encountered on this map are: longitudinal structures of predominantly SSW-NNE direction that include folds of different style and order, normal and reverse faults with occasional lateral slip component, and many smaller fractures as the sets of conjugate faults. Sets of transversal (cutting) faults were also recognized. Folds, located on the fringe of the Ardenne generally expose north-verging “plis-en-chaise” style, with axial plane schistosity. [less ▲]

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See detailRhynchonellid and spiriferid brachiopods as valuable tools for correlation of shelly faunas near the Devonian/Carboniferous boundary
Brice, Denise; Mottequin, Bernard ULg

in Record - Geological Survey of Western Australia (2011, July), 2011/20

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See detailUnusual skip marks from the early Visean Molignee Formation (Mississippian) of sourthern Belgium
Mottequin, Bernard ULg; Poty, Edouard ULg

in Geological Survey of Western Australia, Record (2011, July), 2011/20

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See detailLes formations de la base du Dévonien inférieur et le socle calédonien dans les vallées de l'Amblève et du Ninglinspo (contexte lithologique et structural)
Mottequin, Bernard ULg; Marion, Jean-Marc ULg

Diverse speeche and writing (2011)

Excursion organisée dans le cadre de la campagne de révision de la Carte géologique de Wallonie et dédiée aux formations cambriennes de La Gleize et de La Venne ainsi qu’aux formations de Marteau ... [more ▼]

Excursion organisée dans le cadre de la campagne de révision de la Carte géologique de Wallonie et dédiée aux formations cambriennes de La Gleize et de La Venne ainsi qu’aux formations de Marteau (Poudingue de Quarreux), de Nonceveux et de Solières (Dévonien inférieur, Lochkovien-Praguien) qui sont bien exposées dans la région de Nonceveux (feuille Louveigné-Spa [49/3-4]). [less ▲]

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See detailThe Belgian collections of fossil Cnidaria and Porifera
Mottequin, Bernard ULg; Coen-Aubert, Marie; Poty, Edouard ULg

in Kölner Forum für Geologie und Paläontologie (2011), 19

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See detailField trip 1: Givetian and Frasnian of Southern Belgium
Boulvain, Frédéric ULg; Coen-Aubert, Marie; Da Silva, Anne-Christine ULg et al

in Kölner Forum für Geologie und Paläontologie (2011), 20

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See detailLower Devonian rhynchonellid brachiopods from the Ougarta area (western Sahara, Algeria)
Brice, Denise; Boumendjel, Kheira; Racheboeuf, Patrick R. et al

in Bulletin of Geosciences (2011), 86(1), 71-90

The description and study of rhynchonellid brachiopods recently collected from the Lower Devonian of the Ougarta area in western Algerian Sahara permitted the revision of previously described and/or ... [more ▼]

The description and study of rhynchonellid brachiopods recently collected from the Lower Devonian of the Ougarta area in western Algerian Sahara permitted the revision of previously described and/or listed taxa, mainly from Morocco. Palaeobiogeographically, the nine identified taxa share many similarities with the rhynchonellid fauna of the Ibarmaghian Domain. Five of the nine identified taxa belong to three genera of the Family Nucinulidae Sartenaer, 2004. Three of these are new taxa, namely Nucinulus orbignyanus crassicostus subsp. nov., Cuninulus ougartaensis sp. nov. and Palinulus saharaensis sp. nov. The our remaining taxa are assigned (one of them questionably) to the genera Lanceomyonia, Stenorhynchia and Glossinulus of the families Hebetoechiidae, Trigonirhynchiidae, and Glossinotoechiidae, respectively. [less ▲]

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