Bernard Mottequin | Royal Belgian Institute of Natural Sciences (original) (raw)
Papers by Bernard Mottequin
The Science of Nature
Bookmarks Related papers MentionsView impact
The Becco locality (Liège province), belongs to the Theux tectonic window and represents a proxim... more The Becco locality (Liège province), belongs to the Theux tectonic window and represents a proximal, probably fluvial, environment corresponding to a channel infill. We present here a preliminary report of the fossil assemblage discovered at the locality. The Becco site has yielded a diverse flora of early seed plants including Moresnetia zalesskyi, Dorinnotheca streeli and Condrusia sp. This assemblage, characteristic of the Belgian Famennian, highlights the diversity of early spermatophytes in the country. Becco has also delivered a rich vertebrate fauna with antiarch, groenlandaspid and phyllolepid placoderms, diplacanthiform acanthodians, as well as actinopterygians and various sarcopterygians. The fossiliferous assemblage of Becco resembles those of several Devonian tetrapod- bearing localities, including that of Strud in Belgium, and could therefore provide a favorable palaeoecological setting in the search for early tetrapods.Peer reviewe
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied du... more Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied due to the poor preservation of material. Here we describe a new fauna of linguliformean brachiopods from the Chevlipont Formation (lower Tremadocian) in the Brabant Massif. The fauna is of low diversity (at least three species belonging to Rosobolus?, Thysanotos, and Broeggeria have been identified) and is dominated by B. cf. salteri (Holl). Low diversity linguliformean brachiopod assemblages in a peri-Gondwanan terrane are characteristic of the lowermost Ordovician. Such assemblages are rooted in the Cambrian indicating that their geographic distribution during the early Ordovician was controlled by the radiation and dispersion of lineages surviving through the latest Cambrian–earliest Tremadocian linguliformean brachiopods taxonomic crisis. In addition we figure for the first time and comment on contemporaneous brachiopod faunas from the Stavelot-Venn Massif in SE Belgium. Finally, we p...
Bookmarks Related papers MentionsView impact
Palaeobiodiversity and Palaeoenvironments, 2020
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Royal Belgian Institute of Natural Sciences, O.D. Earth and History of Life, Vautierstreet 29, B ... more Royal Belgian Institute of Natural Sciences, O.D. Earth and History of Life, Vautierstreet 29, B 1000 Brussels, Belgium. E-mails: roland.dreesen@telenet.be, bmottequin@naturalsciences.be Université de Lille 1, UFR Sciences Terre, UMR CNRS 8198 EvoEcoPaléo, Avenue Paul Langevin, 59655 Villeneuve d’Ascq cedex, France. E-mail: Daniel.Vachard@univ-lille1.fr Evolution & Diversity Dynamics Lab, Université de Liège, Bat. B18, Allée du Six-Août, Sart Tilman, B-4000 Liège, Belgium. E-mail: jmmarion@ulg.ac.be
Bookmarks Related papers MentionsView impact
Geologica Belgica, Aug 29, 2013
Bookmarks Related papers MentionsView impact
Geologica Belgica, 2016
Bookmarks Related papers MentionsView impact
Cretaceous rocks, unconformably resting on the Palaeozoic basement, are recognised in several reg... more Cretaceous rocks, unconformably resting on the Palaeozoic basement, are recognised in several regions within the southern and northeastern parts of Wallonia (Belgium), mainly in the Mons Basin and the Liege area, respectively. In northeast Wallonia, Upper Cretaceous deposits essentially include sands, chalks and calcarenites. Northwest of Liege, they are generally covered by Cenozoic (Paleogene) and/or thick loess deposits. Campanian and Maastrichtian carbonate rocks (Gulpen and Maastricht formations) are still extensively quarried for the production of Portland cement in the valleys of the Meuse and Geer rivers, north of Liege. They are also excellent reservoir rocks, affected by a double porosity and constitute the Hesbaye aquifer, which is crucial for the water supply of Liege and its suburbs.
Bookmarks Related papers MentionsView impact
The Belgian Frasnian was investigated for a long time and displays well dated and correlatable se... more The Belgian Frasnian was investigated for a long time and displays well dated and correlatable sections. They allow to document the evolution of the carbonate platform and buildups, and their decease relating to the Frasnian crises. The sequence stratigraphy of the Middle and Upper Frasnian was revised here and has allowed to establish that the development of the buildups was well correlated with the third-order sequences. During the Middle Frasian, the onset and vertical growth of the three levels of reefs (" Arche " , " Boverie " and " Lion ") correspond to the transgressive system tract (TST) of the sequences. During the high-stand (HST) and the falling-stage system tracts (FSST), their vertical growth decreased, and they evolved to progradant carbonate platforms, 1 – 3 km wide and un to140 m high (including the biohermal core), in which bounstone are replaced by packstone – grainstone, then by shallow-water and intertidal mudstone (FSST). There is n...
Bookmarks Related papers MentionsView impact
The Hun Member of the Yvoir Formation represents the uppermost part of the Hastarian Substage (Lo... more The Hun Member of the Yvoir Formation represents the uppermost part of the Hastarian Substage (Lower Tournaisian, Lower Carboniferous) in the southern part of the Condroz sedimentation area of the Namur-Dinant Basin (S Belgium). This 12 m-thick member is composed of sandy bioclastic limestone alternating with shale layers and cherts; it is interpreted as the lowstand system tract of the third order sequence #3 of Hance et al. (2001). In the Chansin quarry (Bocq valley), this member has yielded an abundant association of silicified fauna showing an exquisite preservation. The association is dominated by rugose and tabulate corals along with brachiopods whereas bryozoans, gastropods and trilobites are only minor components. The rugose corals fauna is composed of solitary trochoid, ceratoid or cylindroid forms belonging to Amplexus coralloides, cf. Amplexizaphrentis sp., Bradyphyllum sp., Caninia cornucopiae, C. aff. cornucopiae, Caninophyllum patulum, " Lophophyllum " koninc...
Bookmarks Related papers MentionsView impact
Bulletin of Geosciences, 2015
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
ABSTRACT This field trip is dedicated to the Devonian and Lower Carboniferous siliciclastics and ... more ABSTRACT This field trip is dedicated to the Devonian and Lower Carboniferous siliciclastics and carbonates from the northern and eastern borders of the Dinant Synclinorium. The sections that will be visited are the following: 1) Tihange, 2) Ombret-Rawsa, 3) Petit Avin quarry, 4) Bois d’Anthisnes quarry, and 5) Belle-Roche quarry.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
The Science of Nature
Bookmarks Related papers MentionsView impact
The Becco locality (Liège province), belongs to the Theux tectonic window and represents a proxim... more The Becco locality (Liège province), belongs to the Theux tectonic window and represents a proximal, probably fluvial, environment corresponding to a channel infill. We present here a preliminary report of the fossil assemblage discovered at the locality. The Becco site has yielded a diverse flora of early seed plants including Moresnetia zalesskyi, Dorinnotheca streeli and Condrusia sp. This assemblage, characteristic of the Belgian Famennian, highlights the diversity of early spermatophytes in the country. Becco has also delivered a rich vertebrate fauna with antiarch, groenlandaspid and phyllolepid placoderms, diplacanthiform acanthodians, as well as actinopterygians and various sarcopterygians. The fossiliferous assemblage of Becco resembles those of several Devonian tetrapod- bearing localities, including that of Strud in Belgium, and could therefore provide a favorable palaeoecological setting in the search for early tetrapods.Peer reviewe
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied du... more Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied due to the poor preservation of material. Here we describe a new fauna of linguliformean brachiopods from the Chevlipont Formation (lower Tremadocian) in the Brabant Massif. The fauna is of low diversity (at least three species belonging to Rosobolus?, Thysanotos, and Broeggeria have been identified) and is dominated by B. cf. salteri (Holl). Low diversity linguliformean brachiopod assemblages in a peri-Gondwanan terrane are characteristic of the lowermost Ordovician. Such assemblages are rooted in the Cambrian indicating that their geographic distribution during the early Ordovician was controlled by the radiation and dispersion of lineages surviving through the latest Cambrian–earliest Tremadocian linguliformean brachiopods taxonomic crisis. In addition we figure for the first time and comment on contemporaneous brachiopod faunas from the Stavelot-Venn Massif in SE Belgium. Finally, we p...
Bookmarks Related papers MentionsView impact
Palaeobiodiversity and Palaeoenvironments, 2020
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Royal Belgian Institute of Natural Sciences, O.D. Earth and History of Life, Vautierstreet 29, B ... more Royal Belgian Institute of Natural Sciences, O.D. Earth and History of Life, Vautierstreet 29, B 1000 Brussels, Belgium. E-mails: roland.dreesen@telenet.be, bmottequin@naturalsciences.be Université de Lille 1, UFR Sciences Terre, UMR CNRS 8198 EvoEcoPaléo, Avenue Paul Langevin, 59655 Villeneuve d’Ascq cedex, France. E-mail: Daniel.Vachard@univ-lille1.fr Evolution & Diversity Dynamics Lab, Université de Liège, Bat. B18, Allée du Six-Août, Sart Tilman, B-4000 Liège, Belgium. E-mail: jmmarion@ulg.ac.be
Bookmarks Related papers MentionsView impact
Geologica Belgica, Aug 29, 2013
Bookmarks Related papers MentionsView impact
Geologica Belgica, 2016
Bookmarks Related papers MentionsView impact
Cretaceous rocks, unconformably resting on the Palaeozoic basement, are recognised in several reg... more Cretaceous rocks, unconformably resting on the Palaeozoic basement, are recognised in several regions within the southern and northeastern parts of Wallonia (Belgium), mainly in the Mons Basin and the Liege area, respectively. In northeast Wallonia, Upper Cretaceous deposits essentially include sands, chalks and calcarenites. Northwest of Liege, they are generally covered by Cenozoic (Paleogene) and/or thick loess deposits. Campanian and Maastrichtian carbonate rocks (Gulpen and Maastricht formations) are still extensively quarried for the production of Portland cement in the valleys of the Meuse and Geer rivers, north of Liege. They are also excellent reservoir rocks, affected by a double porosity and constitute the Hesbaye aquifer, which is crucial for the water supply of Liege and its suburbs.
Bookmarks Related papers MentionsView impact
The Belgian Frasnian was investigated for a long time and displays well dated and correlatable se... more The Belgian Frasnian was investigated for a long time and displays well dated and correlatable sections. They allow to document the evolution of the carbonate platform and buildups, and their decease relating to the Frasnian crises. The sequence stratigraphy of the Middle and Upper Frasnian was revised here and has allowed to establish that the development of the buildups was well correlated with the third-order sequences. During the Middle Frasian, the onset and vertical growth of the three levels of reefs (" Arche " , " Boverie " and " Lion ") correspond to the transgressive system tract (TST) of the sequences. During the high-stand (HST) and the falling-stage system tracts (FSST), their vertical growth decreased, and they evolved to progradant carbonate platforms, 1 – 3 km wide and un to140 m high (including the biohermal core), in which bounstone are replaced by packstone – grainstone, then by shallow-water and intertidal mudstone (FSST). There is n...
Bookmarks Related papers MentionsView impact
The Hun Member of the Yvoir Formation represents the uppermost part of the Hastarian Substage (Lo... more The Hun Member of the Yvoir Formation represents the uppermost part of the Hastarian Substage (Lower Tournaisian, Lower Carboniferous) in the southern part of the Condroz sedimentation area of the Namur-Dinant Basin (S Belgium). This 12 m-thick member is composed of sandy bioclastic limestone alternating with shale layers and cherts; it is interpreted as the lowstand system tract of the third order sequence #3 of Hance et al. (2001). In the Chansin quarry (Bocq valley), this member has yielded an abundant association of silicified fauna showing an exquisite preservation. The association is dominated by rugose and tabulate corals along with brachiopods whereas bryozoans, gastropods and trilobites are only minor components. The rugose corals fauna is composed of solitary trochoid, ceratoid or cylindroid forms belonging to Amplexus coralloides, cf. Amplexizaphrentis sp., Bradyphyllum sp., Caninia cornucopiae, C. aff. cornucopiae, Caninophyllum patulum, " Lophophyllum " koninc...
Bookmarks Related papers MentionsView impact
Bulletin of Geosciences, 2015
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
ABSTRACT This field trip is dedicated to the Devonian and Lower Carboniferous siliciclastics and ... more ABSTRACT This field trip is dedicated to the Devonian and Lower Carboniferous siliciclastics and carbonates from the northern and eastern borders of the Dinant Synclinorium. The sections that will be visited are the following: 1) Tihange, 2) Ombret-Rawsa, 3) Petit Avin quarry, 4) Bois d’Anthisnes quarry, and 5) Belle-Roche quarry.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact