Geological Survey of Finland, Special Paper 46 - arkisto.gsf.fi

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Geological Survey of Finland, Special Paper 46 Peter Johansson and Pertti Sarala The Peribaltic Group is an INQUA (International Union for Quaternary Research) research group, bringing together ice age researchers from countries around the Baltic Sea. It is one of the most active working groups of INQUA’s commission meeting regularly once a year for over ten years now. The aim of the working group is to enhance the research co-operation between the countries around the Baltic Sea and to create contacts between researchers in different countries. Its most crucial concrete tasks are to compile a comprehensive fi le on glacial fl ow patterns and a GIS-based map database of late-glacial ice-dammed lakes and marginal meltwater fl ow systems. The 2006 meeting of the working group took place from 11 th to 15 th September in Finland, having a lecture-day in 13 th September at the Oulanka research station in Kuusamo, which belongs to Oulu University. All in all, 43 researchers (Fig. 1) from eight different countries came together to give lectures, discuss and share the latest research results about climate changes during the Weichselian Ice Age, the movement of glaciers, the morphological features they created and the development of the vegetation. Many lectures proposed the theory that the Weichselian Ice Age was characterised by very short glacial phases and that the phases without ice 6 PREFACE were much longer than previously thought. The new information is based on new, more accurate age determination methods and a tighter sample network. The results of recent new applications in geophysical working methods applied in Quaternary research were also introduced. The occurrence and fl ow patterns of glaciers of the Early and Middle Weichselian glaciation stages, however, remained open questions. The meeting included a four-day-excursion to northern and central Ostrobothnia and southern Lapland, with the theme of ‘glacial morphology in the central part of the Scandinavian ice sheet – stratigraphic and postglacial development’. Besides the key stratigraphical points in Ostrobothnia and southwest Lapland, the participants also visited Koillismaa and southern Lapland, where the glacial dynamics and the circumstances of the glacigenic deposits in the last deglaciation stage are visible. The Geological Survey of Finland and the University of Oulu’s Institute of Geosciences had organised the meeting and excursion. The Finnish National Committee for Quaternary Research, the University of Helsinki’s Department of Geology, the Peribaltic Group and the University of Oulu’s Thule Institute also participated in organising the event. At the meeting, 48 lectures were given, 17 of Fig. 1. A group shot of the participants at the 2006 INQUA Peribaltic Group Meeting at the Hirvas pothole in Rovaniemi.
which were speeches and 31 poster presentations. This publication contains the written and revised abstracts of 21 lectures. The abstracts were reviewed by Professors Matti Eronen, Juha-Pekka Lunkka, Matti Räsänen and Veli-Pekka Salonen, and Doctors Heikki Hirvas and Antti Ojala. Their contribution is gratefully acknowledged. Doctors Peter Johansson and Pertti Sarala served as the reviewers and editors of this publication. Mrs Carrie Turunen kindly revised the language of many articles in this publica- Geological Survey of Finland, Special Paper 46 Applied Quaternary research in the central part of glaciated terrain tion. Finally, the editors express their special gratitude to the Geological Survey of Finland (GTK) for supporting the publication of the workshop papers in this GTK Special Paper, volume 46. Abstracts of the lectures and excursion guide have also been published on GTK’s website: http://info.gsf.fi /info/ julkaisuluettelo.html under: Erikoisjulkaisut – Miscellaneous publications, numbers 55 and 56. Peter Johansson and Pertti Sarala, Rovaniemi 10.8.2007 7
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Page 6 and 7: 4 CONTENTS Preface, Peter Johansson
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Geological Survey of Finland, Speci
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In Lokka, the sheetfl ow tracks wer
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Fig. 5. A compilation of low altitu
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Applied Quaternary research in the
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Applied Quaternary research in the
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deposited over the fi lled channel,
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Michigan Lobe as it advanced into t
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Type IV Tunnel channels The Type IV
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Attig, J. W., Mickelson, D. M. & Cl
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In summary, the northern part of th
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www.gtk. info@gtk. e Peribaltic Gro
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