Cet article, qui se veut un hommage à la ténacité et à l'enthousiasme de G. Wouters et J.-Cl. Lepage, est une synthèse des découvertes de cynodontes et de mammifères primitifs dans le Trias supérieur, en région lorraine et luxembourgeoise. Quatre sites ont fourni des fossiles de ces animaux: Saint-Nicolas-de-Port (France), Habay-la-Vieille, Attert (Belgium) and Medemach (G.-D. Luxembourg). Le contenu fossilifère (cynodontes et mammifères) de ces gisements est répertorié. Les différents taxons mentionnés sont ensuite brièvement présentés.
The present paper is a review of the discoveries of cynodonts and early mammals in the Upper Triassic of Lorraine and Luxembourg. Four localities have provided fossils of these animals: Saint-Nicolas-de-Port (France), Habay-la-Vieille, Attert (Belgium) and Medemach (G.-D. Luxembourg). A check list of cynodonts and mammals dis-covered in these sites is given. The different taxa mentioned are briefly described.
A new fauna of crustacean decapods has been discovered on the occasion of the digging of two large wells in Kimmeridgian marls and limestones at Bure (Lorraine, France). Among the stratigraphically well repaired identified fossils <em>Thalassinoidea</em> are abundant with the species Etallonia isochela (Woodward, 1876). Other fossils are represented by a <em>Paguridae</em> (<em>Palaeopagurus sp.</em>) and two <em>Erymidae</em>: <em>Eryma cf. babeaui</em> (Etallon, 1861) and <em>E. ventrosa</em> (Von Meyer, 1835) this last one has provided fragments of carapace and fragments of chelipeds. Propodes of E. isochela sometime display remains of coloration patterns that indicate a low oxygen level of depositional and diagenetic environments.
An integrated stratigraphic study was conducted on a Kimmeridgian succession of 3rd-order cycles including marls and limestones in a shelf context at Bure (Paris Basin). The study was possible due to the exceptional opportunity provided by well-boring activities related to the construction of an underground laboratory of the French National Agency for Radioactive Waste Management (ANDRA). Studies of macrofossils, microfossils, sedimentology, clay mineralogy, isotopic composition (C, O) of shells and organic molecular geochemistry lead to a detailed description of the stratigraphic column, which allows us to address the history of sea-level and climate changes. Six transgressive–regressive cycles are recognised in the studied Kimmeridgian succession. In these 3rd-order cycles, the deepest environments are systematically represented by marls and organic-rich sediments whilst the shallowest are represented by limestones. These cycles do not correspond to changes in temperatures or carbonate production rates at a regional or global scale. On the contrary, long-term palaeontological, sedimentological, and geochemical changes during the Early Kimmeridgian are interpreted as climatically induced. These climatic changes are considered as responsible for bringing significant granular carbonate production to an end, in contrast to carbonate mud that was deposited in alternation with marls throughout the Late Kimmeridgian.
Les sondages d_Arlon et de Villers-devant-Orval Belgique ont montré l_existence, dans l_Hettangien inférieur de la Bordure Ardennaise, de Pre-Planorbis Beds fossilifères. Un niveau à petites Ammonites Schlotheimiidae y a été repéré. Ce sont les plus anciennes Schlotheimia stratigraphiquement bien localisées, connues à ce jour.
