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Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE

  • RONGCHANG WU (a1) (a2), MIKAEL CALNER (a1) and OLIVER LEHNERT (a1) (a3) (a4)

One of the few and most complete records of the MDICE (Middle Darriwilian Isotope Carbon Excursion) is herein documented from Baltoscandia. Based on a core section penetrating the condensed Lower–Middle Ordovician succession (~46 m) on the island of Öland, southeastern Sweden, we provide an integrated scheme for carbon isotope chemostratigraphy (313 samples) and conodont biostratigraphy (29 samples) for this period. The carbonate succession in the Tingskullen core records 12 conodont zones and 6 subzones, including the Oepikodus evae, Trapezognathus diprion, Baltoniodus triangularis, B. navis, B. norrlandicus, Lenodus antivariabilis, L. variabilis, Yangtzeplacognathus crassus, Eoplacognathus pseudoplanus (Microzarkodina hagetiana and Microzarkodina ozarkodella subzones), E. suecicus, Pygodus serra (E. foliaceus, E. reclinatus, E. robustus and E. lindstroemi subzones) and Pygodus anserinus zones in ascending order. The δ13Ccarb record reveals an apparently complete record of the MDICE, including a rising limb, a well-defined peak and a falling limb. The anomaly covers a thickness of c. 27 m in the core and spans the Eoplacognathus pseudoplanus, E. suecicus, Pygodus serra and P. anserinus conodont zones. Combined with the new, detailed conodont biostratigraphy, the MDICE in the Tingskullen core can be used for detailed correlation with successions from Baltica, North America, the Argentine Precordillera, South China and North China.

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Ainsaar, L., Kaljo, D., Martma, T., Meidla, T., Männik, P., Nõlvak, J. & Tinn, O. 2010. Middle and Upper Ordovician carbon isotope chemostratigraphy in Baltoscandia: a correlation tool and clues to environmental history. Palaeogeography, Palaeoclimatology, Palaeoecology 294, 189201.
Ainsaar, T., Meidla, T. & Martma, T. 1999. Evidence for a widespread carbon isotopic event associated with late Middle Ordovician sedimentological and faunal changes in Estonia. Geological Magazine 136, 4962.
Ainsaar, L., Meidla, T. & Tinn, O. 2004. Middle and Upper Ordovician stable isotope stratigraphy across the facies belts in the East Baltic. In WOGOGOB-2004: Conference Materials (eds Hints, O. & Ainsaar, L.), pp. 1112. Tartu: Tartu University Press.
Ainsaar, L., Meidla, T., Tinn, O., Martma, T. & Dronov, A. 2007. Darriwilian (Middle Ordovician) carbon isotope stratigraphy in Baltoscandia. Acta Palaeontologica Sinica 46 (Suppl.), 18.
Albanesi, G. L., Bergström, S. M., Schmitz, B., Serra, F., Feltes, N. A., Voldman, G. G. & Ortega, G. 2013. Darriwilian (Middle Ordovician) δ13Ccarb chemostratigraphy in the Precordillera of Argentina: documentation of the middle Darriwilian Isotope Carbon Excursion (MDICE) and its use for intercontinental correlation. Palaeogeography, Palaeoclimatology, Palaeoecology 389, 4863.
An, T. X. 1981. Recent progress in Cambrian and Ordovician conodont biostratigraphy of China. Geological Society of America Special Paper 187, 209–17.
An, T. X. 1987. Early Paleozoic Conodonts from South China. Beijing: Peking University Publishing House, 238 pp. (in Chinese).
Azmy, K., Stouge, S., Christiansen, J. L., Harper, D. A. T., Knight, I. & Boyce, D. 2010. Carbon-isotope stratigraphy of the Lower Ordovician succession in Northeast Greenland: implications for correlations with St. George Group in western Newfoundland (Canada) and beyond. Sedimentary Geology 225, 6781.
Bagnoli, G. & Stouge, S. 1997. Lower Ordovician (Billingenian – Kunda) conodont zonation and provinces based on sections from Horns Udde, north Öland, Sweden. Bullettino della Societa Paleontologica Italiana 35, 109–63.
Banner, J. L. & Hanson, G. N. 1990. Calculation of simultaneous isotopic and trace element variations during water interaction with applications to carbonate diagenesis. Geochimica et Cosmochimica Acta 54, 3123–37.
Bergström, S. M. 1971. Conodont biostratigraphy of the Middle and Upper Ordovician of Europe and Eastern North America. Geological Society of America Memoir 127, 83161.
Bergström, S. M., Calner, M., Lehnert, O. & Noor, A. 2011. A new upper Middle Ordovician–Lower Silurian drillcore standard succession from Borenshult in Östergötland, southern Sweden: 1. Stratigraphical review with regional comparisons. GFF 133, 149–71.
Bergström, S. M., Chen, X., Gutiérrez-Marco, J. C. & Dronov, A. 2009. The new chronostratigraphic classification of the Ordovician System and its relations to major regional series and stages and to δ13C chemostratigraphy. Lethaia 42, 97107.
Bergström, S. M., Lehnert, O., Calner, M. & Joachimski, M. M. 2012. A new upper Middle Ordovician–Lower Silurian drillcore standard succession from Borenshult in Östergötland, southern Sweden: 2. Significance of δ13C chemostratigraphy. GFF 134, 3963.
Bergström, J., Pärnaste, H. & Zhou, Z. Y. 2013. Trilobites and biofacies in the Early–Middle Ordovician of Baltica and a brief comparison with the Yangtze Plate. Estonian Journal of Earth Sciences 62 (4), 205–30.
Brenchley, P. J., Carden, G. A., Hints, L., Kaljo, D., Marshall, J. D., Martma, T., Meidla, T. & Nõlvak, J. 2003. High-resolution stable isotope stratigraphy of Upper Ordovician sequences: constraints on the timing of bioevents and environmental changes associated with mass extinction and glaciation. Geological Society of America Bulletin 115, 89104.
Buggisch, W., Keller, M. & Lehnert, O. 2003. Carbon isotope record of the Late Cambrian and Early Ordovician carbonates of the Argentine Precordillera. Palaeogeography, Palaeoclimatology, Palaeoecology 195, 357–73.
Calner, M., Lehnert, O., Wu, R. C., Dahlqvist, P. & Joachimski, M. M. 2014. δ13C chemostratigraphy in the Lower–Middle Ordovician succession of Öland (Sweden) and the global significance of the MDICE. GFF 136, 4854.
Edwards, C. T. & Saltzman, M. R. 2014. Carbon isotope (δ13Ccarb) stratigraphy of the Lower–Middle Ordovician (Tremadocian–Darriwilian) in the Great Basin, western United States: implications for global correlation. Palaeogeography, Palaeoclimatology, Palaeoecology 399, 120.
Epstein, A. G., Epstein, J. B. & Harris, L. D. 1977. Conodont color alteration – an index to organic metamorphism. US Geological Survey Professional Paper 995, 127.
Guo, Y. R., Zhao, Z. Y., Xu, W. Y., Shi, X. Y., Gao, J. R., Bao, H. P., Liu, J. B., Zhang, Y. L. & Zhang, Y. Q. 2014. Sequence stratigraphy of the Ordovician System in the Ordos Basin. Acta Sedimentologica Sinica 32 (1), 4460 (in Chinese with English abstract).
Harper, D. A. T. 2006. The Ordovician biodiversification: setting an agenda for marine life. Palaeogeography, Palaeoclimatology, Palaeoecology 232, 148–66.
Jaanusson, V. 1960. The Viruan (Middle Ordovician) of Öland. Publications from the Palaeontological Institution of the University of Uppsala 28, 207–88. (Reprinted from: The Bulletin of the Geological Institutions of the University of Uppsala Vol. XXXVIII).
Jaanusson, V. 1961. Discontinuity surfaces in limestones. Publications from the Palaeontological Institution of the University of Uppsala 35, 221–41. (Reprinted from: The Bulletin of the Geological Institutions of the University of Uppsala Vol. XL).
Jaanusson, V. 1976. Faunal dynamics in the Middle Ordovician (Viruan) of Baltoscandia. In The Ordovician System (ed. Bassett, M. G.), pp. 301–26. Cardiff: University of Wales Press and National Museum of Wales.
Jaanusson, V. 1982. Introduction to the Ordovician of Sweden. In Field Excursion Guide. 4th International Symposium on the Ordovician System (eds Bruton, D. L. & Williams, S. H.), pp. 110. Paleontological Contributions from the University of Oslo 279.
Jaanusson, V. 1995. Confacies differentiation and upper Middle Ordovician correlation in the Baltoscandian basin. Proceedings of the Estonian Academy of Science, Geology 44, 7386.
Jeppsson, L., Anehus, R. & Fredholm, D. 1999. The optimal acetate buffered acetic acid technique for extracting phosphatic fossils. Journal of Paleontology 73, 964–72.
Kaljo, D., Martma, T. & Saadre, T. 2007. Post-Hunnebergian Ordovician carbon isotope trend in Baltoscandia, its environmental implications and some similarities with that of Nevada. Palaeogeography, Palaeoclimatology, Palaeoecology 245, 138–55.
Lehnert, O., Meinhold, G., Wu, R. C., Calner, M. & Joachimski, M. M. 2014. δ13C chemostratigraphy in the upper Tremadocian through lower Katian (Ordovician) carbonate succession of the Siljan district, central Sweden. Estonian Journal of Earth Sciences 63 (4), 277–86.
Leslie, S. A., Saltzman, M. R., Bergström, S. M., Repetski, J. E., Howard, A. & Seward, A. M. 2011. Conodont biostratigraphy and stable isotope stratigraphy across the Ordovician Knox/Beekmantown unconformity in the central Appalachians. In Ordovician of the World (eds Gutiérrez-Marco, J. C., Rábano, I. & Diego, G.-B.), pp. 301–8. Publicaciones del Instituto Geológico y Minero de España, Serie, Cuadernos del Museo Geomin-Minero Vol. 14.
Li, Z. H., Stouge, S., Chen, X. H., Wang, C. S., Wang, X. F. & Zeng, Q. L. 2010. Precisely compartmentalized and correlated Lower Ordovician Oepikodus evae Zone of the Floian in the Huanghuachang Section, Yichang, Hubei Province. Acta Palaeontologica Sinica 49, 108–24 (in Chinese with English abstract).
Lindström, M. 1971. Lower Ordovician conodonts of Europe. Geological Society of America Memoir 127, 2161.
Löfgren, A. 1978. Arenigian and Llanvirnian conodonts from Jämtland, northern Sweden. Fossils and Strata 19, 1129.
Löfgren, A. 1994. Arenig (Lower Ordovician) conodonts and biozonation in the eastern Siljan District, central Sweden. Journal of Paleontology 68, 1350–68.
Löfgren, A. 2000. Early to early Middle Ordovician conodont biostratigraphy of the Gillberga quarry, northern Öland, Sweden. GFF 122, 321–38.
Löfgren, A. 2003. Conodont faunas with Lenodus variabilis in the upper Arenigian to lower Llanvirnian of Sweden. Acta Palaeontologica Polonica 48, 417–36.
Ludvigson, G. A., Jacobson, S. R., Witzke, B. J. & González, L. A. 1996. Carbonate component chemostratigraphy and depositional history of the Ordovician Decorah Formation, Upper Mississippi Valley. Geological Society of America Special Paper 306, 6786.
Ludvigson, G. A., Witzke, B. J., Schneider, C. L., Smith, E. A., Emerson, N. R., Carpenter, S. J. & González, L. A. 2004. Late Ordovician (Turonian – Chatfieldian) carbon isotope excursions and their stratigraphic and paleoceanic significance. Palaeogeography, Palaeoclimatology, Palaeoecology 210, 187214.
Marshall, J. D. 1992. Climatic and oceanographic isotopic signals from the carbonate rock record and their preservation. Geological Magazine 129, 143–60.
Meidla, T., Ainsaar, L., Backman, J., Dronov, A., Holmer, L. & Sturesson, U. 2004. Middle–Upper Ordovician carbon isotope record from Västergötland (Sweden) and East Baltic. In WOGOGOB-2004 Conference Materials (eds Hints, O. & Ainsaar, L.), pp. 67–8. Tartu: Tartu University Press.
Munnecke, A., Zhang, Y. D., Liu, X. & Cheng, J. F. 2011. Stable carbon isotope stratigraphy in the Ordovician of South China. Palaeogeography, Palaeoclimatology, Palaeoecology 307, 1743.
Pärnaste, H., Bergström, J. & Zhou, Z. Y. 2013. High resolution trilobite stratigraphy of the Lower–Middle Ordovician Öland Series of Baltoscandia. Geological Magazine 150, 509–18.
Patzkowsky, M. E., Slupik, L. M., Arthur, M. A., Pancost, R. D. & Freeman, K. H. 1997. Late Middle Ordovician environmental change and extinction: harbinger of the Late Ordovician or continuation of Cambrian patterns? Geology 25, 911–4.
Saltzman, M. R. 2005. Phosphorus, nitrogen, and the redox evolution of the Paleozoic oceans. Geology 33, 573–6.
Saltzman, M. R. & Young, S. A. 2005. Long-lived glaciation in the Late Ordovician? Isotopic and sequence-stratigraphic evidence from western Laurentia. Geology 33, 109–12.
Schmitz, B., Bergström, S. M. & Wang, X. F. 2010. The middle Darriwilian (Ordovician) δ13C excursion (MDICE) discovered in the Yangtze Platform succession in China: implications of its first recorded occurrences outside Baltoscandia. Journal of the Geological Society, London 167, 249–59.
Schmitz, B., Harper, D. A. T., Peucker-Ehrenbrink, B., Stouge, S., Alwmark, C., Chronholm, A., Bergström, S. M., Tassinari, M. & Wang, X. F. 2008. Asteroid breakup linked to the Great Ordovician Biodiversification Event. Nature Geoscience 1, 4953.
Serpagli, E. 1974. Lower Ordovician conodonts from Precordilleran Argentina (Province of San Juan). Bollettino della Società Paleontologica Italiana 13, 1798.
Servais, T., Lehnert, O., Li, J., Mullins, G. L., Munnecke, A., Nützel, A. & Vecoli, M. 2008. The Ordovician Biodiversification: revolution in the oceanic trophic chain. Lethaia 41, 99109.
Servais, T., Owen, A. W., Harper, D. A. T., Kröger, B. & Munnecke, A. 2010. The Great Ordovician Biodiversification Event (GOBE): the palaeoecological dimension. Palaeogeography, Palaeoclimatology, Palaeoecology 294, 99119.
Stouge, S. 2004. Ordovician siliciclastics and carbonates of Öland, Sweden. In International Symposium on “Early Palaeozoic Palaeogeography and Palaeolimate” (IGCP 503), September 1–3, 2004, Erlangen, Germany (eds Munnecke, A., Servais, T. & Schulbert, C.), pp. 91111. Erlanger Geologische Abhandlungen – Sonderband 5.
Stouge, S. & Bagnoli, G. 1988. Early Ordovician conodonts from Cow Head Peninsula, western Newfoundland. Palaeontographica Italica 75, 89179.
Tjernvik, T. 1952. Om de lägsta ordoviciska lagren i Närke. Geologiska Föreningens I Stockholm Förhandlingar 74, 5170.
Tjernvik, T. 1956. On the Early Ordovician of Sweden. Stratigraphy and fauna. Bulletin of the Geological Institutions of the University of Uppsala 36, 107284.
Torsvik, T. H., Smethurst, M. A., Van der Voo, R., Trench, A., Abrahamsen, N. & Halvorsen, E. 1992. Baltica. A synopsis of Vendian–Permian palaeomagnetic data and their palaeotectonic implications. Earth-Science Reviews 33, 133–52.
Trotter, J. A., Williams, I. S., Barnes, C. R., Lécuyer, C. & Nicoll, R. S. 2008. Did cooling oceans trigger Ordovician biodiversification? Evidence from conodont thermometry. Science 321, 550–4.
van Wamel, W. A. 1974. Conodont biostratigraphy of the Upper Cambrian and Lower Ordovician of north-western Öland, southeastern Sweden. Utrecht Micropaleontological Bulletins 10, 1126.
Viira, V. 1974. Konodonty Ordovika Pribaltiki [Ordovician Conodonts of the East Baltic]. Tallinn: Valgus, 142 pp.
Wang, Z. H. & Bergström, S. M. 1999. Conodonts across the base of the Darriwilian Stage in South China. Acta Micropalaeontologica Sinica 16, 325–50 (in Chinese with English abstract).
Wang, Z. H., Bergström, S. M., Zhen, Y. Y., Chen, X. & Zhang, Y. D. 2013. On the integration of Ordovician conodont and graptolite biostratigraphy: new examples from Gansu and Inner Mongolia in China. Alcheringa 37, 510–28.
Wang, X. F., Stouge, S., Chen, X. H., Li, Z. H., Wang, C. S., Finney, S. C., Zeng, Q. L., Chen, H. M. & Erdtmann, E.-D. 2009. The global stratotype section and point for the base of the Middle Ordovician series and the third stage (Dapingian). Episodes 32, 96113.
Wang, X. F., Stouge, S., Erdtmann, B.-D., Chen, X. H., Li, Z. H., Wang, C. S., Zeng, Q. L., Zhou, Z. Q. & Cheng, H. M. 2005. A proposed GSSP for the base of the Middle Ordovician Series: the Huanghuachang section, Yichang, China. Episodes 28, 105–17.
Webby, B. D., Droser, M. L., Paris, F. & Percival, I. G. (eds) 2004. The Great Ordovician Biodiversification Event. New York: Columbia University Press, 484 pp.
Westergård, A. H. 1922. Sveriges olenidskiffer. – I. Utbredning och Lagerföljd. II. Fauna 1. Trilobita. Sveriges Geolologiska Undersökning Series Ca 18, 205 pp.
Young, S. A., Saltzman, M. R. & Bergström, S. M. 2005. Upper Ordovician (Mohawkian) carbon isotope (δ13C) stratigraphy in eastern and central North America: regional expression of a perturbation of the global carbon cycle. Palaeogeography, Palaeoclimatology, Palaeoecology 222, 5376.
Zhang, J. H. 1998a. Middle Ordovician conodonts from the Atlantic Faunal Region and the evolution of key conodont genera. Meddelanden från Stockholms Universitets institution för Geologi Och Geokemi 298, 527.
Zhang, J. H. 1998b. Conodonts from the Guniutan Formation (Llanvirnian) in Hubei and Hunan Provinces, south-central China. Stockholm Contributions in Geology 46, 1161.
Zhang, Y. D., Munnecke, A., Chen, X., Cheng, J. F. & Liu, X. 2011. Biostratigraphic and chemostratigraphic correlation for the base of the Middle Ordovician between Yichang and western Zhejiang areas, South China. Acta Geologica Sinica 85, 320–9.
Zhang, J. H. & Sturkell, E. F. F. 1998. Aserian and Lasnamägian (Middle Ordovician) conodont biostratigraphy and lithology at Kullstaberg and Lunne in Jämtland, central Sweden. GFF 120, 7583.
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