Astibia H.,University of the Basque Country |
Payros A.,University of the Basque Country |
Ortiz S.,PetroStrat Ltd |
Elorza J.,University of the Basque Country |
And 14 more authors.
Journal of Iberian Geology | Year: 2016
Fossil associations from the middle and upper Eocene (Bartonian and Priabonian) sedimentary succession of the Pamplona Basin are described. This succession was accumulated in the western part of the South Pyrenean peripheral foreland basin and extends from deep-marine turbiditic (Ezkaba Sandstone Formation) to deltaic (Pamplona Marl, Ardanatz Sandstone and Ilundain Marl formations) and marginal marine deposits (Gendulain Formation). The micropalaeontological content is high. It is dominated by foraminifera, and common ostracods and other microfossils are also present. The fossil ichnoasssemblages include at least 23 ichnogenera and 28 ichnospecies indicative of Nereites, Cruziana, and ?Scoyenia-Mermia ichnofacies. Body macrofossils of about 80 taxa corresponding to macroforaminifera, sponges, corals, bryozoans, brachiopods, annelids, molluscs, arthropods, echinoderms and vertebrates have been identified. Both the number of ichnotaxa and of species (e. g. bryozoans, molluscs and condrichthyans) may be considerably higher. Body fossil assemblages are comparable to those from the Eocene of the Nord Pyrenean area (Basque Coast), and also to those from the Eocene of the west-central and eastern part of South Pyrenean area (Aragon and Catalonia). At the European scale, the molluscs assemblages seem endemic from the Pyrenean area, although several Tethyan (Italy and Alps) and Northern elements (Paris Basin and Normandy) have been recorded. Palaeontological data of studied sedimentary units fit well with the shallowing process that throughout the middle and late Eocene occurs in the area, according to the sedimentological and stratigraphical data. © 2016, Universidad Complutense de Madrid. All rights reserved.
de Lapparent de Broin F.,University Pierre and Marie Curie |
Murelaga X.,University of the Basque Country |
Farres F.,Museu Geologic del Seminari de Barcelona |
Altimiras J.,Museu Geologic del Seminari de Barcelona
Geobios | Year: 2014
Osonachelus decorata nov. gen., nov. sp., is the first named chelonioid turtle from the Iberian Peninsula. This Eocene turtle was found in the marine sediments of the Vespella Marls Member (Vic-Manlleu Marls Formation, upper Bartonian) that occur in the Osona county (eastern Ebro Basin, Province of Barcelona, Catalonia, Spain). The area is rich in invertebrate, fish, and plant fossils but various vertebrates, including several chelonian taxa, have remained unpublished. This paper is the first dedicated to the fossil turtles of this area. Osonachelus nov. gen. is a large turtle with an impressive, massive skull revealing a specialized diet, a large and well-fenestrated shell (well ornamented dorsally and much lightened ventrally), and large paddles for high-sea locomotion. It is phylogenetically located among relatively advanced cheloniids, just basal to modern forms. Although apparent similarities in shell morphology exist with Allopleuron from the Maastrichtian of Holland, Osonachelus nov. gen. is distinct due to its masticatory apparatus, less usual among cheloniids and seemingly closer to that of the Lutetian Eochelone from Belgium. Based on the deeply concave and smooth lower jaw symphysis, its diet probably consisted of soft animals or plants rather than hard-food items. Therefore, it occupied a specialized ecological niche that is unique for the Eocene of the Iberian Peninsula. © 2014 Elsevier Masson SAS.
Boukhary M.,Ain Shams University |
Hewaidy A.G.,Al - Azhar University of Egypt |
Luterbacher H.,Museu Geologic del Seminari de Barcelona |
Bassiouni M.E.-A.,Ain Shams University |
Al-Hitmi H.,Qatar University
Micropaleontology | Year: 2011
The study of the foraminifera and ostracodes from theUmmer Radhuma Formation in five wells of the Dukhan Oil Field in Western Qatar allows to reevalute the age of the type-levels of the larger rotaliid foraminifera first described by Smout in his classical paper in 1954 as Early Eocene (late Ypresian, zones P8/9 respectively E6/7 of Berggren and Pearson 2006a). During the Early Eocene, a rather uniform depositional environment prevailed in a large part of the Arabian Platform as indicated by the close similarity of the microfaunas of Western Qatar to those of the same age in the Rub alKhali in Saudi Arabia (Hasson 1985), Wadi Rusayl inOman, (Racey 1995), Shabwa in southwestern Yemen (Ismail and Boukhary 2008) and this fauna extends eastwards to Tibet (Wan 1991). The environment of deposition ofUmmer Radhumawas marine andmost probably sheltered lagoon that prevailed during the Ypresian of Qatar. The planktonic and the larger rotaloid foraminifera and the ostracodes are illustrated and discussed briefly.
Luterbacher H.,Museu Geologic Del Seminari de Barcelona
Special Paper of the Geological Society of America | Year: 2016
The doctoral thesis of Otto Renz on the Scaglia in the Central Apennines, published in 1936, led the foundation for the enduring fame of the region of Gubbio, Italy, as a special place to study the geohistory of the Cretaceous and the Paleogene. © 2016 The Geological Society of America. All rights reserved.
Farres F.,Museu Geologic Del Seminari de Barcelona |
Altimiras J.,Museu Geologic Del Seminari de Barcelona
Batalleria | Year: 2012
For the first time, some insects in Priabonian carbonate beds of the country of Vic (Barcelona province) are cited. The following fossils are pointed out: Several weevils, a possibly specimen of the family Eccoptarthridae, also an specimen of Hymenoptera, some carabids of genus Calosoma, an abdomen of beetle or aquatic Heteroptera and remains of an Odonata. The fossil insects are close related to trace fossils of larvae of Diptera (ichnogenus Cochlichnus).