Org. Divers. Evol. 6, Electr. Suppl. 16, part 3: 1 - 18 (2006) © Gesellschaft für Biologische Systematik http://senckenberg.de/odes/06-16.htm URN: urn:nbn:de:0028-odes0616-5 Pons, J.M. & Vicens, E. Field Guide to Pyrenean Rudist Bivalves. Electr. Suppl. 16, part 3. − to: Malchus, N. & Pons, J.M. (2006): Abstracts and Posters of the “International Congress on Bivalvia” at the Universitat Autònoma de Barcelona, Spain, 22-27 July 2006. Org. Divers. Evol. 6(4): 327. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 2 Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 3 Organising Committee Dr. Cristian Altaba, Universitat de les Illes Balears Dr. Jaume Gallemí, Museu de Geologia (MCNC), Barcelona Dr. Eulalia Gili, Universitat Autònoma de Barcelona Dr. Gregori López, Museu de Geologia (MCNC), Barcelona Dr. Nikolaus Malchus, Universitat Autònoma de Barcelona, (president) Dr. Ricard Martínez, Universitat Autònoma de Barcelona Dr. Jose Maria Pons, Universitat Autònoma de Barcelona, (vice-president) Dr. Carlos Saavedra, Instituto de Acuicultura-Torre La Sal, Castellón (CSIC) Dr. José Templado, Museo Nacional de Ciencias Naturales, Madrid (CSIC) Dr. Francesc Uribe, Museu de Zoologia (MCNC), Barcelona Dr. Enric Vicens, Universitat Autònoma de Barcelona Technical Assistence Javier Aguilar, Sergi Albrich, Sandra Córcoles, Mercedes González, Ramón Mercedes, Angéelica Oviedo, Yolanda Pichardo, Mònica Soler, Luis Troya, Vicent Vicedo, Raquel Vilallonga, Sheila Villalba Scientific Committee Dr. Cristian Altaba, Universitat de les Illes Balears Dr. Rudiger Bieler, The Field Museum, Chicago, USA Dr. David Campbell, University of Alabama, USA Dr. Joseph Carter, University of North Carolina, USA Dr. Antonio Checa, Universidad de Granada Dr. Graciela Delvene, Museo Geominero, Madrid Dr. Gonzalo Giribet, Harvard University, USA Dr. Serge Gofas, Universidad de Málaga Dr. Elizabeth Harper, Cambridge University, UK Dr. Gerhard Haszprunar, Zoologische Staatssammlung München, Germany Dr. Katrin Linse, British Antarctic Survey, Cambridge, UK Dr. Paula Mikkelsen, American Museum of Natural History, NY, USA Dr. Diarmaid Ó'Foighil, Museum of Zoology, University of Michigan, USA Dr. Juan Peña, Instituto de Acuicultura Torre la Sal, Castellón (CSIC) Dr. Carmen Salas, Universidad de Málaga Dr. Eleftherios Zouros, University of Crete, Greece Sponsors and Collaborators Logo and cover design: Vicent Vicedo Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 4 OBJECTIVES At Collades de Basturs, to observe rudists and rudist buildups in the neritic marls and in the intercalated intervals each deposited from a carbonate shelf of the Santonian Collades Member. The succession consists of four small-scale sequences within the highstand systems tract of a depositional sequence, topped by a small scale drowning sequence. At Cellers-Moror area, to observe the last rudists and rudist buildups of the Pyrenean marine Upper Cretaceous intercalated in the continental deposits of the Tremp Formation (Garumnian facies). MOST RECENT REFERENCES Sanders, D. and Pons, J.M. 2001. Stratigraphic architecture of a Santonian mixed siliciclastic- carbonate succession (Catalonian Pyrenees, Spain). Facies 44: 105-136. Vicens, E., Ardèvol, L., López Martínez, N. and Arribas, M.E. 2004. Rudist biostratigraphy in the Campanian-Maastrichtian of the south-central Pyrenees, Spain. Courier Forschungsinstitut Senckenberg 247: 113-127. FIELD TRIP SCHEDULE Thursday 27 July 7.00 Field trip starts from Hotel Serhs Campus, Bellaterra 7.00-9.15 Van ride Bellaterra – Isona Bellaterra - (A-18) - Manresa - (C-25) - Calaf - (C-1412 / C-1412a) - Ponts - (C- 1412b) - Isona 9.15-9.45 Coffee pause in Isona To prepare us for the long first stop 9.45-10.00 Ride to STOP 1 Isona – Abella de la Conca – Can Borrell 10.00-13.30 STOP 1. Collades de Basturs Sorry, this is really not a stop. We will wander on rudists up and dawn along four km. Solar protection for skin and eyes, a hat or a cap, and suitable footwear is highly recommended. 13.30-13.45 Ride back to Isona 13.45-14.45 Lunch 14.45-15.30 Ride to Cellers and Moror Isona - (C-1412) - Tremp - (C-13) - Cellers - (LV-9124) - Moror 15:30-17:30 STOP 2. Moror /18:00 Gentle walk/ride visiting several outcrops of the Cellers-Moror area 18:00-20:30 Ride back to Bellaterra Moror - (LV-9124) - Cellers (C-13 / C-147) - Balaguer - (LV-3025) - Agramunt - (L-303) - Cervera - (C-25) - Manresa - (A-18) - Bellaterra Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 5 THE GEOLOGICAL SCENERY OF OUR JOURNEY Our field trip starts in Bellaterra, near Sabadell, and follows NNW the motorway until Manresa. From the continental Miocene deposits of the Vallès Depression we will cross the Vallès fault, the metamorphic Palaeozoic, the folded marine Triassic, the overthrust of the last two on the continental Palaeocene, this last, and the Lower Eocene in the Ebre Basin. From Manresa the road runs NW gently on the Upper Eocene and Oligocene continental deposits of the Ebre Basin and then the road climbs to the Comiols Pass (1.101 m) arriving to the Cretaceous. Unfortunately it is not the best period of the year to have a clear view of the Conca de Tremp with the Axial Area of the Pyrenees on the background. From here, the road goes dawn in the Tremp Basin and reaches Isona crossing from the last marine Cretaceous rocks to the continental Garumnian facies. The mountain road to Abella de la Conca first, and then to Can Borrell, shall drive us on the Cretaceous to the Santonian rudist-paradise of Collades de Basturs. STOP 1 After the lunch, we will cross towards S the Garumnian facies and the Palaeocene of the Tremp Basin syncline until the uppermost marine Cretaceous beds of the Montsec to visit the last Pyrenean rudists near Cellers and Moror. STOP 2 Return shall be southwards, through the Terradets Gorge, crossing the Montsec Range, and then across the Marginal Ranges (Serres Marginals) until Balaguer. Then eastwards to Cervera and Manresa and from there back to Bellaterra. Localities and units appearing in the figures 1 and 2 have been emphasized. Servei Geològic de Catalunya, Institut Cartogràfic de Catalunya. 2002. Mapa Geològic de Catalunya 1:250.000. Berastegui, X., Losantos, M., Muñoz, J. A., Puigdefàbregas, C. 1993. Tall geològic del Pirineu central 1:200.000. Servei Geològic de Catalunya, Institut Cartogràfic de Catalunya. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 6 ECORS Fig. 1 - Simplified geological map of Catalonia Fig. 2 - Southern part of the ECORS profile Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 7 Fig. 3 - Aerial view of our field trip area The photo was taken during a flight Barcelona-London. The Montsec Range appears at the upper left corner. The Noguera Pallaresa river crosses the upper part of the photo from the right margin (N) to the left (S). Sant Antoni Lake is distinguishable at right and Cellers Lake and the Terradets Gorge at left. The centre of the photo is occupied by the Tremp Basin syncline. The Sant Corneli-Abella-Boixols anticline appears at the lower right margin and the Isona anticline at the left bottom. The Cellers-Moror area (STOP 2) at the left and the Collades de Basturs area (STOP 1) at the right are emphasized. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 8 Fig. 4 - Ortho-photomap of the Collades de Basturs area Fig. 5 - Ortho-photomap of the Cellers-Moror area Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 9 A B Fig. 6 - STOP 1 Collades de Basturs A - Panoramic view to west. B - Panoramic view to east. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 10 Fig. 7 - STOP 1 Collades de Basturs A - Hippuritid biostrome within a carbonate interval. Base is at right. View to west. B - Detail of the tabulae developed in the inner shell layer of the hippuritids. Base A is at right. View to west. C - Detail of the hippuritid biostrome topped by the start of a coral-sponge- rudist biocon- struction. Base is at right. View to west. B C Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 11 A B C Fig. 8 - STOP 1 Collades de Basturs A - Depositional geometry in the upward-shoaling part of a carbonate interval. View to east. B - Bioclastic rudstones to grainstons interval toplapping the bioconstruction. View to east. C - Coral-sponge-rudist bioconstruction. View to east. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 12 Fig. 9 - STOP 2 Cellers-Moror. Correlated sections along the Cellers-Moror area. We hope you learned enough Catalan to understand the legend, designs may help. Fig. 10 - Geological map of the Cellers-Moror area. Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 13 A - Biradiolites chaperi horizon B - Detail of A D - Detail of C E - Hippuritella castroi s.s. C - Biradiolites moroi horizon horizon with Praeradiolites boucheroni G - Detail of F Fig. 11 - STOP 2 Cellers- F - Hippuritella castroi s.s. horizon Moror with Monopleura moroi Org. Divers. Evol. 6, Electr. Suppl. 16, part 3 (2006) Pons & Vicens: Field Guide to Pyrenean Rudist Bivalves 14 Fig. 12 - Shell morphology of the hippuritids (Hippurites radiosus) A - Transverse section of the right valve close to the commissure.