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The Seventh Baltic Stratigraphical Conference Geological Society of Estonia Baltic Stratigraphical Association Institute of Geology at Tallinn University of Technology Institute of Ecology and Earth Sciences, University of Tartu Geological Survey of Estonia THE SEVENTH BALTIC STRATIGRAPHICAL CONFERENCE ABSTRACTS & FIELD GUIDE Tallinn, 2008 Geological Society of Estonia Baltic Stratigraphical Association Institute of Geology at Tallinn University of Technology Institute of Ecology and Earth Sciences, University of Tartu Geological Survey of Estonia THE SEVENTH BALTIC STRATIGRAPHICAL CONFERENCE ABSTRACTS & FIELD GUIDE Edited by O. Hints, L. Ainsaar, P. Männik and T. Meidla 7th Baltic Stratigraphical Conference 17-18 May 2008 Tallinn, Estonia Tallinn, 2008 The Seventh Baltic Stratigraphical Conference 15‒22 May 2008, Estonia Abstracts and Field Guide Edited by O. Hints, L. Ainsaar, P. Männik and T. Meidla Scientific Committee: Organisers: Prof. Dimitri Kaljo (Chairman, Tallinn) Geological Society of Estonia Prof. Jurga Lazauskiene (Vilnius) Baltic Stratigraphical Association Prof. Tatyana Koren (St. Petersburg) Institute of Geology at Tallinn University of Technology Prof. Ervīns Lukševičs (Rīga) Institute of Ecology and Earth Sciences, University of Tartu Prof. Anto Raukas (Tallinn) Geological Survey of Estonia Dr. Thomas Servais (Lille) Recommended reference to this publication Kiipli, E. 2008. Reconstruction of currents in the Ordovician-Silurian Baltic Basin. In: Hints, O., Ain- saar, L., Männik, P. & Meidla, T. (eds). The Seventh Baltic Stratigraphical Conference. Absracts and Field Guide. Geological Society of Estonia, Tallinn. p. 46. The Conference has a special session of IGCP Project No 503 “Ordovician Palaeogeography and Palaeoclimate“. See more information at www.igcp503.org. Project 503 The Conference is an event of the International Year of Planet Earth, an initia- ORDOVICIAN tive of UNESCO and IUGS aiming to raise public awareness of Earth Sciences. PALAEOGEOGRAPHY AND PALAEOCLIMATE See www.esfs.org and www.planeetmaa.org. This publication and parts of it can be freely distributed, copied and modified under the Creative Commons Attri- bution-NonCommercial Licence (http://creativecommons.org/licenses/by-nc/3.0/) if not stated otherwise. Electronic version can be downloaded at www.gi.ee/7bsc. Hard copies can be obtained from: The Geological Society of Estonia / Institute of Geology at TUT Ehitajate 5, 19086 Tallinn, Estonia Phone: +372 620 30 10 Fax: +372 620 30 11 Website: www.gi.ee E-mail: [email protected] Supported by the Environmental Investment ISBN 978-9985-815-68-7 Centre www.kik.ee Tallinn, 2008 Preface Baltic co-operation in the field of regional stratigraphy started already in 1969 when the Baltic Regional Stratigraphical Commission (BRSC) was founded. In 1970–1980s, many meetings, workshops and field excursions were organized. BRSC played an important role in promoting stratigraphical research in the former Soviet Union and contributing to the development of stratigraphical schemes used for geologic mapping in the Baltic region and NW Russia. In 16 October 1990, owing to increased independence of the Baltic States, the BRSC was reformed into a less formal organization — the Baltic Stratigraphical Association (BSA), which unites the national stratigraphical commissions. The regional stratigraphical commission of NW Russia also joined BSA in 2003. One of the main activities of BSA has been organizing regular scientific conferences devoted to regional geology and stratigraphy. Up to now six meetings have been held in Tallinn (1991, 1996), Vilnius (1993, 2002), Riga (1999) and St. Petersburg (2005). The Seventh Baltic Stratigraphical Conference to be held on 18–19 May 2008 in Tallinn has attracted nearly 80 participants from 10 countries. The current volume includes 66 abstracts dealing with different aspects of palaeontology, regional geology, chemostratigraphy and biostratigraphy, stratigraphical methodology, correlation issues and so forth. A special session of IGCP Project 503 “Ordovician Palaeogeography and Palaeoclimate” will be arranged and the conference is an event of the UNESCO International Year of Planet Earth (2007–2009). Starting already from the first “open” meeting in Vilnius in 1993, the scientific scope of the Baltic stratigraphical conferences has always been wider than just “Baltic stratigraphy”. Thus one may wonder why we call it a “stratigraphical conference” at all? This is perhaps something to discuss in connection with the next meetings. Also, the future role of BSA itself should be discussed. In recent meetings no formal decisions or agreements that affect stratigraphy and corresponding nomenclature have been made. Yet there are many possibilities how closer co-operation between the geologists of the Baltic region could promote stratigraphy and Earth sciences in general. Organizing stratigraphical information, increasing its accessibility, compiling joint stratigraphical schemes and building connections with the International Commission on Stratigraphy and its subcommissions — these could be some of the future tasks for BSA. We welcome you in Estonia and wish you a nice stay here. Olle Hints and Tõnu Meidla On behalf of the Organizing Committee and the Estonian Commission on Stratigraphy The Seventh Baltic Stratigraphical Conference, 1–22 May 2008, Estonia ABSTRACTS Contents Preface.......................................................................................................................................................................3 ABSTRACTS...........................................................................................................................................................9 Ainsaar, L., Kaljo, D., Martma, T. & Meidla, T.: Middle and Upper Ordovician carbon isotope stratigraphy in Baltoscandia: towards a regional chemostratigraphic standard ........................................................9 Antoshkina, A.: Sedimentary evidence about Middle Ludfordian climatic event on the north-eastern European Platform .................................................................................................................................10 Beznosova, T.M. & Lukin, V.Y.: Main Turns and Factors of Timan – Northern Ural Biota Transformation during Early Paleozoic ......................................................................................................................... 11 Bičkauskas, G. & Molenaar, N.: Nature of the so-called ‘reefs’ in the Přidolian carbonate system of the Silurian Baltic Basin ..............................................................................................................................12 Buggisch, W., Joachimski, M.M. & Lehnert, O.: Late Ordovician (Turinian–Chatfieldiean) climate of Laurentia ................................................................................................................................................13 Calner, M. & Lehnert, O.: A first report on the Upper Ordovician stratigraphy of the Borenshult-1 core, Motala, Sweden ......................................................................................................................................14 Delabroye, A., Vecoli, M., Nõlvak, J. & Uutela, A. Biostratigraphic (graptolites, chitinozoans, acritarchs, brachiopods) and chemostratigraphic (δ13C) correlations between latest Ordovician strata in Laurentia and Baltica ............................................................................................................................15 Dolgov, O.O.: Trilobite taxonomy of the Middle and Upper Ordovician of western Leningrad district (Russia) and northern Estonia ...............................................................................................................16 Dronov, A.V.: Mishina Gora section and its position on the Ordovician facies profile ....................................17 Dronov, A.V., Kanygin, A.V. & Gonta, T.V.: New data on the Ordovician of the Irkutsk Basin ......................18 Engalychev, S.J.: Group of Quaternary meteoritic craters in the east of Moscow area (Russia) ....................19 Gogin, I.I.: Diagnostic microlithotypes for the main facies complexes of the Ordovician in Northwest Siberia...................................................................................................................................20 Goldman, D., Klosterman, S.L., Nõlvak, J., Sheets, D.H. & Miller, G.C.: Correlation of the Middle and Upper Ordovician rocks of Baltoscandia using CONOP9: preliminary results ....................................21 Harris, M.T., Hints, L. & Nõlvak, J.: Facies and sequences of the Vormsi Stage of the East Baltic ................22 Heinsalu, A., Poska, A. & Veski, S.: Lake ecosystem responses to Holocene environmental changes: two diatom-based high-resolution case studies from southern Estonia .................................................23 Hints, O., Li, J., Tang, P. & Yan, K.: Biogeography of early Paleozoic scolecodont-bearing polychaetes: new data from South China and Tarim ..................................................................................................24 Hints, R., Kirsimäe, K., Somelar, P., Kallaste, T. & Kiipli, T.: Multiphase Silurian bentonites from western Estonia: possible diagenetic pathways .................................................................................................25 Iskyul, G. & Fedkovets, A.: The key section of the Shundorovo Formation (the Idavere Regional Stage) in the western part of St. Petersburg Region: lithostratigraphy and sedimentology
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