Skeletonized microfossils from the Lower-Middle Cambrian transition of the Cantabrian Mountains, Northern Spain

• Autorzy: Clausen S , Alvaro J.J.
• Języki publikacji: EN

Abstrakty

EN

Two different assemblages of skeletonized microfossils are recorded in bioclastic shoals that cross the Lower–Middle Cambrian boundary in the Esla nappe, Cantabrian Mountains. The uppermost Lower Cambrian sedimentary rocks represent a ramp with ooid−bioclastic shoals that allowed development of protected archaeocyathan−microbial reefs. The shoals yield abundant debris of tube−shelled microfossils, such as hyoliths and hyolithelminths (Torellella), and trilobites. The overlying erosive unconformity marks the disappearance of archaeocyaths and the Iberian Lower–Middle Cambrian boundary. A different assemblage occurs in the overlying glauconitic limestone associated with development of widespread low−relief bioclastic shoals. Their lowermost part is rich in hyoliths, hexactinellid, and heteractinid sponge spicules (Eiffelia), chancelloriid sclerites (at least six form species of Allonnia, Archiasterella, and Chancelloria), cambroclaves (Parazhijinites), probable eoconchariids (Cantabria labyrinthica gen. et sp. nov.), sclerites of uncertain affinity (Holoplicatella margarita gen. et sp. nov.), echinoderm ossicles and trilobites. Although both bioclastic shoal complexes represent similar high−energy conditions, the unconformity at the Lower–Middle Cambrian boundary marks a drastic replacement of microfossil assemblages. This change may represent a real community replacement from hyolithelminth−phosphatic tubular shells to CES (chancelloriid−echinoderm−sponge) meadows. This replacement coincides with the immigration event based on trilobites previously reported across the boundary, although the partial information available from originally carbonate skeletons is also affected by taphonomic bias.

Słowa kluczowe

EN

hyolith; cambroclavid; benthic replacement; microfossil; skeletonized microfossil; Spain; hyoliththelminth; sponge; chancelloriid; Cambrian; paleontology; Cantabrian Mountains; Lower-Middle Cambrian

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2006
• Tom: 51
• Numer: 2
• Opis fizyczny: p.223-238,fig.,ref.

Twórcy

autor

Clausen S

• Universite des Sciences et Technologies de Lille, UFR Sciences de la Terre, 59655-Villeneuve d'Ascq, France

autor

Alvaro J.J.

Bibliografia

• Álvaro, J.J. and Clausen, S. 2005. Major geodynamic and sedimentary constraints on the chronostratigraphic correlation of the Lower–Middle Cambrian transition in the western Mediterranean region. Geosciences Journal 9: 145–160.
• Álvaro, J.J. and Clausen, S. (in press). Microbial crusts as indicators of stratigraphic diastems in the Cambrian Micmacca Breccia, Moroccan Atlas. Sedimentary Geology.
• Álvaro, J.J. and Colchen, M. 2002. Earliest Ordovician pelmatozoan holdfasts from western Europe: the Oryctoconus problem revisited. Eclogae Geologica Helvetiae 95: 451–459.
• Álvaro, J.J. and Vennin, E. 1996. Spicules d’éponges et Chancelloriidae Cambriens des Chaînes Ibériques, NE Espagne. Revue de Micropaléontologie 394: 293–304.
• Álvaro, J.J. and Vennin, E. 2001. Benthic marine communities recorded in the Cambrian Iberian platform, NE Spain. Palaeontographica, Abteilung A 262: 1–23.
• Álvaro, J.J., Elicki, O., Geyer, G., Rushton, A.W.A., and Shergold, J.H. 2003. Palaeogeographical controls on the Cambrian trilobite immigration and evolutionary patterns reported in the Western Gondwana margin. Palaeogeography, Palaeoclimatology, Palaeoecology 195: 5–35.
• Álvaro, J.J., Gozalo, R., Liñán E., and Sdzuy, K. 1993. The palaeogeography of northern Iberia at the Lower–Middle Cambrian transition. Bulletin de la Société géologique de France 164: 843–850.
• Álvaro, J.J., Rouchy, J.M., Bechstädt, T., Boucot, A., Boyer, F., Debrenne, F., Moreno−Eiris, E., Perejón, A., and Vennin, E. 2000a. Evaporitic constraints on the southward drifting of the western Gondwana margin during Early Cambrian times. Palaeogeography, Palaeoclimatology, Palaeoecology 160: 105–122.
• Álvaro, J.J., Vennin, E., Moreno−Eiris, E., Perejón, A., and Bechstädt, T. 2000b. Sedimentary patterns across the Lower–Middle Cambrian transition in the Esla nappe (Cantabrian Mountains, northern Spain). Sedimentary Geology 137: 43–61.
• Álvaro, J.J., Vizcaïno, D., and Vennin, E. 1999. Trilobite diversity patterns in the Middle Cambrian of southwestern Europe: a comparative study. Palaeogeography, Palaeoclimatology, Palaeoecology 151: 241–254.
• Aramburu, C. and García Ramos, J.C. 1993. La sedimentación cambroordovícica en la Zona Cantábrica (NO de España). Trabajos de Geología 19: 45–73.
• Aramburu, C., Truyols, J., Arbizu, M., Méndez−Bedia, I., Zamarreño, I., García−Ramos, J.C., Suárez de Centi, C., and Valenzuela, M. 1992. El Paleozoico Inferior de la Zona Cantábrica. In: J. C. Gutiérrez−Marco, C. Saavedra, and I. Rábano (eds.), Paleozoico Inferior de Ibero−América, 397–422. UNEX Press, Mérida.
• Bengtson, S. and Missarzhevsky, V.V. 1981. Coeloscleritophora—a major group of enigmatic Cambrian metazoans. U.S. Geological Survey Open−File Report 81–743: 19–21.
• Bengtson, S., Conway Morris, S., Cooper, B.J., Jell, P.A., and Runnegar, B.N. 1990. Early Cambrian fossils from South Australia. Association of Australasian Palaeontologists, Memoir 9: 1–364.
• Burzin, M.B., Debrenne, F., and Zhuravlev, A.Yu. 2001. Evolution of shallow−water level−bottom communities. In: A.Yu. Zhuravlev and R. Riding (eds.), The Ecology of the Cambrian Radiation, 217–237. Columbia University Press, New York.
• Clausen, S. and Smith, A.B. 2005. Palaeoanatomy and biological affinities of a Cambrian problematic deuterostome (Stylophora).Nature 438: 351–354.
• Conway Morris, S. and Chen, M. 1991. Cambroclaves and paracarinachitids, early skeletal problematica from the Lower Cambrian of South China. Palaeontology 34: 357–397.
• Conway Morris, S. and Peel, J.S. 1995. Articulated halkieriids from the Lower Cambrian of North Greenland and their role in early protostomate evolution. Philosophical Transactions of the Royal Society of London B 347: 305–358.
• Conway Morris, S., Crampton, J.S., Xiao, B., and Chapman, A.J. 1997. Lower Cambrian cambroclaves (incertae sedis) from Xinjiang, China, with comments on the morphological variability of sclerites. Palaeontology 40: 167–189.
• Debrenne, F. 1991. Extinction of the Archeocyatha. Historical Biology 5: 95–106.
• Debrenne, F. and Zamarreño, I. 1970. Sur la découverte d’Archéocyathes dans le Cambrien du NW de l’Espagne. Breviora Geologica Asturica 14: 1–11.
• Doré, F. and Reid, R.E. 1965. Allonia tripodophora nov. gen., nov. sp., nouvelle éponge du Cambrien inférieur de Carteret (Manche). Comptes Rendus sommaires des séances de la Société géologique de France 1965: 20–21.
• Duan, C. 1984. Small shelly fossils from the Lower Cambrian Xihaoping Formation in the Shannongjia district, Hubei province—hyoliths and fossil skeletons of unknown affinities [in Chinese]. Bulletin of Tianjin Institute of Geology and Mineral Ressources 7: 143–188.
• Fernández−Remolar, D. 2001. Chancelloridae del Ovetiense inferior de la Sierra de Córdoba, España. Revista Española de Paleontología 16: 39–61.
• Fisher, D.W. 1962. Small conoidal shells of uncertain affinities. In: R.C. Moore (ed.), Treatise on Invertebrate Paleontology. Part W, Miscellanea, W98–W143. Geological Society of America, Boulder, and University of Kansas Press, Lawrence.
• Grant, R.E. 1836. Animal kingdom. In: R.B. Todd (ed.), The Enciclopedia of Anatomy and Physiology 1, 107–118. Gilbert and Piper, London.
• Gravestock, D.I., Alexander, E.M., Demidenko, Yu.E., Esakova, N.V., Holmer, L.E., Jago, J.B., Lin Tianrui, Melnikova, L.M., Parkhaev, P.Yu., Rozanov, A.Yu., Ushatinskaya, G.T., Zang Wenlong, Zhegallo, E.A., and Zhuravlev, A.Yu. 2001. The Cambrian biostratigraphy of the Stansbury Basin, South Australia. Transactions of the Palaeontological Institute, Russian Academy of Sciences 282: 1–344. Nauka/Interperiodica, Moscow.
• Hao, Y. and Shu, D.G. 1987. The oldest known well−preserved Pheodaria (Radiolaria) from southern Shaanxi [in Chinese with English summary]. Geoscience 1: 301–310.
• Heredia, S., Bordonaro, O., and Matteoda, E. 1987. Espículas de poríferos de la formación la Cruz, Cámbrico Superior, Departamento. Las Heras, provincia de Mendoza. Ameghiniana 24: 17–20.
• Hinde, G.J. 1887–1888. A monograph of the British fossil sponges, Parts I and II. Palaeontographical Society of London 1887: 1–92, 1888: 93–188.
• Hinz, I. 1987. The Lower Cambrian microfauna of Comley and Rushton, Shropshire, England. Palaeontographica Abteilung A 198: 41–100.
• Holm, G. 1893. Sveriges Kambrisk−Siluriska Hyolithidae och Conularidae [with English summary]. Sveriges Geologiska Undersökning, Afhandlingar och Uppsater C 112: 1–172.
• Janussen, D., Steiner, M., and Zhu, M. 2002. New well−preserved scleritomes of Chancelloridae from the Early Cambrian Yuanshan Formation (Chengjiang, China) and the Middle Cambrian Wheeler Shale (Utah, USA) and paleobiological implications. Journal of Paleontology 76: 902–905.
• Kouchinsky, A.V. 2001. Mollusks, hyoliths, stenothecoids, and coeloscleritophorans. In: A.Yu. Zhuravlev and R. Riding (eds.), The Ecology of the Cambrian Radiation, 326–349. Columbia University Press, New York.
• Kruse, P.D. 2002. Biostratigraphic potential of Middle Cambrian hyoliths from the eastern Georgina basin. Alcheringa 26: 353–398.
• Landing, E. and Bartowski, K.E. 1996. Oldest shelly fossils from the Taconic allochthon and late Early Cambrian sea−levels in eastern Laurentia. Journal of Paleontology 70: 741–761.
• Laubenfels, M.W. de 1955. Porifera.In: R.C. Moore (ed.), Treatise on Invertebrate Paleontology, Part E, Archaeocyatha and Porifera, E21–E112. Geological Society of America and University of Kansas Press, Lawrence.
• Linnarsson, J.G.O. 1871. Om några försteningar från Sveriges och Norges “Primordialzon”. Ofversigt af Konglische Vetenskaps Akademiens Förhandlingar 6: 789–796.
• Luo, H.L., Jiang, Z.W., Wu, X.Ch., Song, X.L., and Lin,Q.Y. 1982. The Sinian–Cambrian Boundary in Eastern Yunnan, China [in Chinese with English summary]. 265 pp. People’s Publishing House, Kunming.
• Marek, L. 1963. New knowledge on the morphology of Hyoliths. Sbornik geologických věd. Paleontologie 9: 51–72.
• Marek, L., Malinky, J.M., and Geyer, G. 1997. Middle Cambrian fossils from Tizi n’Tichka, the High Atlas, Morocco. Part 2. Hyolitha. Journal of Paleontology 71: 638–656.
• Mehl, D. 1996. Organization and microstructure of the chancelloriid skeleton: implications for the biomineralization of the Chancelloriidae. Bulletin de l’Institut océanographique, Monaco, no. spécial 14: 377–385.
• Mehl, D. 1998. Porifera and Chancelloriidae from the Middle Cambrian of the Georgina Basin, Australia. Palaeontology 41: 1153–1182.
• Missarzhevsky, V.V. [Missarževskij, V.V.] and Mambetov, A.M. 1981. Stratigraphy and fauna of the Precambrian–Cambrian boundary beds of Malyj Karatau [in Russian]. Trudy Geologičeskogo Instituta AN SSSR 326: 1–92.
• Mohr van der Meer, C.G. 1969. The stratigraphy of the Cambrian Láncara Formation between the Luna river and the Esla river in the Cantabrian Mountains, Spain. Leidse Geologische Mededelingen 43: 233–316.
• Moreno−Eiris, E., Perejón, A., Rodríguez, S., and Falces, S. 1995. Paleozoic Cnidaria and Porifera from Sierra Morena. Field Trip D. In: A. Perejón (ed.), VII International Symposium on Fossil Cnidaria and Porifera, 1–68. Real Sociedad Española de Historia Natural, Madrid.
• Mostler, H. and Mosleh−Yazdi, A. 1976. Neue Poriferen aus oberkambrischen Gesteinen der Milaformation im Elburzgebirge (Iran). Geologische Paläontologische Mitteilungen der Universität Innsbruck 5: 1–36.
• Perejón, A. and Moreno−Eiris, E. 2003. Arqueociatos del Bilbiliense (Cámbrico Inferior) del manto del Esla, Cordillera Cantábrica, Norte de España. Boletín de la Real Sociedad Española de Historia Natural (Sección Geológica) 98: 51–71.
• Qian, J. and Xiao, B. 1984. An early Cambrian small shelly fauna from Aksu−Wushi region, Xinjiang. Professional Papers in Stratigraphy and Palaeontology, Chinese Academy of Geological Sciences 13: 65–90.
• Qian, Y. 1978. The early Cambrian hyoliths in central and south−west China and their stratigraphical significance [in Chinese with English summary]. Memoirs of the Nanjing Institute of Geology and Palaeontology 11: 1–38.
• Qian, Y. 1989. Early Cambrian small shelly fossils of China with special reference to the Precambrian–Cambrian boundary. In: Nanjing Institute of Geology and Palaeontology, Academia Sinica (ed.), Stratigraphy and Palaeontology of Systemic Boundaries in China, Precambrian–Cambrian Boundary (2) [in Chinese with English summary]. 341 pp. Nanjing University Publishing House, Nanjing.
• Qian, Y. and Bengtson, S. 1989. Palaeontology and biostratigraphy of the Early Cambrian Meishucunian stage in Yunnan province, South China. Fossils and Strata 24: 1–156.
• Qian, Y. and Xiao, L. 1995. Hyoliths. ix + 262 pp. Science Press, Beijing.
• Qian, Y. and Yin, G. 1984. Zhijinitidae and its stratigraphical significance [in Chinese with English summary]. Acta Paleontologica Sinica 23: 215–223.
• Qian, Y., Yin, G., and Xiao, B. 2000. Opercula of hyoliths and operculumlike fossils from the Lower Cambrian Yuertus Formation, Xinjiang. Acta Micropalaeontologica Sinica 17: 404–415.
• Rigby, J.K. 1986. Sponges of the Middle Cambrian Burgess Shale (Middle Cambrian), British Columbia. Palaeontographica Canadiana 2: 1–105.
• Schmidt, O. 1870. Grundzüge einer Spongien−Fauna des atlantischen Gebeites. iv + 88 pp. Wilhelm Engelmann, Leipzig.
• Sdzuy, K. 1958. Neue Trilobiten aus dem Mittelkambrium von Spanien. Seckenbergiana Lethaea 39: 235–254.
• Sdzuy, K. 1969. Unter− und mittelkambrische Porifera (Chancelloriida und Hexactinellida). Paläontologische Zeitschrift 43: 115–147.
• Shields, G.A., Brown, B., Álvaro, J.J., Brasier, M., and Veizer, J. 2004. Isotopic signature of Early–Middle Cambrian extinction events, new data from Europe. 32nd International Geological Congress Florence. Abstracts Volume [http://www.32igc.info/igc32/search].
• Skovsted, C.B. 2003. The Early Cambrian Fauna of North−East Greenland. 22 pp. Geotryckeriet, Uppsala.
• Smith, A.B. 1980. Stereom microstructure of the echinoid test. Special Papers in Palaeontology 25: 1–81.
• Sokolov, B.S. and Zhuravleva, I.T. [Žuravleva, I.T.] (eds.) 1983. Lower Cambrian stage subdivision of Siberia. Atlas of fossils [in Russian]. Trudy Geologičeskogo Instituta AN SSSR 558: 1–215.
• Sumrall, C.D., Sprinkle, J., and Guensburg, T.E. 1997. Systematics and paleoecology of Late Cambrian echinoderms from the western United States. Journal of Paleontology 71: 1091–1109.
• Sysoyev, V.A. [Sysoev, V.A.] 1960. Microstructure of the Hyolithes shells and their systematic position [in Russian]. Doklady Akademii nauk SSSR 131: 423–426.
• Sysoyev, V.A. [Sysoev, V.A.] 1962. Hiolity kembriâ severnogo sklona Aldanskogo ŝita. 65 pp. Âkutskij filial’ Sibirskogo otdeleniâ Instituta Geologii AN SSSR, Âkutsk.
• Sysoyev, V.A. [Sysoev, V.A.] 1968. Stratigrafiâ i hiolity drevnejših sloev nižnego kembriâ Sibirskoj platformy. 67 pp. Âkutskij filial’ Sibirskogo otdeleniâ Instituta Geologii AN SSSR, Âkutsk.
• Truyols, J., Arbizu, M.A., García−Alcalde, J.L., García López, S., Méndez Bedia, I., Soto, F., and Truyols Massoni, M. 1990. The Asturian−Leonese Domain (Cantabrian Zone). Part II, Cantabrian and Palentian Zones. In: R.D. Dallmeyer and E. Martínez García (eds.), Pre−Mesozoic Geology of Iberia, 10–19. Springer−Verlag, Berlin.
• Vasilieva, N.I. [Vasil’eva, N.I.] 1986. On the systematics of the Order Chancelloriida Walcott, 1920 (incertae sedis) from Lower Cambrian deposits of the eastern Siberian platform [in Russian]. In: B.S. Sokolov and I.T. Žuravleva (eds.), Problematiki pozdnego dokembriya i paleozoya. Trudy Instituta Geologii i Geofiziki SO AN SSSR 632: 115–126.
• Walcott, C.D. 1920. Cambrian geology and paleontology. IV. Middle Cambrian Spongiae. Smithsonian Miscellanea Collections 67: 261–364.
• Wrona, R. 2004. Cambrian microfossils from glacial erratics of King George Island, Antarctica. Acta Palaeontologica Polonica 49: 13–56.
• Yates, A.M., Gowlett−Holmes, K.L., and McHenry, B.J. 1992. Triplicatella disdoma reinterpreted as the earliest known polyplacophoran. Journal of the Malacological Society of Australia 13: 71.
• Zamarreño, I. 1972. Las litofacies carbonatadas del Cámbrico de la Zona Cantábrica (NW España) y su distribución paleogeográfica. Trabajos Geológicos 5: 1–118.
• Zhou, M., Zhang, J., and Qian, Y. 2001. Sinian–Cambrian boundary stratigraphy at Gezhongwu, Zhijin county, Ghuizou province, China: phosphorite and small shelly fossils. Palaeoworld 13: 209–215.