Erratum to: Severnaya Zemlya,Arctic Russia: a nucleation area for Kara Sea ice sheets during the Middle to Late Quaternary: [Quaternary Science Reviews 25(21–22) (2006) 2894–2936] |
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| Institution: | 1. GeoBiosphere Science Centre, Department of Geology, Quaternary Sciences, Lund University, Sölvegatan 12, SE-22362 Lund, Sweden;2. Institute of Arctic and Alpine Research (INSTAAR), Campus Box 450, University of Colorado, Boulder, CO 80309-0450, USA;3. Department of Geology and Geography, Askja, University of Island, IS-101 Reykjavík, Iceland;4. Department of Earth and Environmental Sciences, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL 60607-7059, USA;5. Department of Earth Sciences, University of Aarhus, C.F. Møllers Allé 120, 8000 Århus, Denmark;6. Arctic and Antarctic Research Institute (AARI), 38 Bering Street, St. Petersburg 199397, Russia;7. Geological Survey of Sweden, Villavägen 18, P.O. Box 670, SE-75128 Uppsala, Sweden;8. VSEGEI (A.P. Karpinsky All Russia Research Geological Institute), 74 Sredny Prospect, St. Petersburg 199106, Russia;9. Netherlands Institute for Fisheries Research (RIVO), Postbus 68, 1970 AB IJmuiden, The Netherlands;10. Alfred-Wegener-Institut für Polar- und Meeresforschung, Forschungsstelle Potsdam, Telegrafenberg A43, 14473 Potsdam, Germany |
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| Abstract: | Quaternary glacial stratigraphy and relative sea-level changes reveal at least four expansions of the Kara Sea ice sheet over the Severnaya Zemlya Archipelago at 79°N in the Russian Arctic, as indicated from tills interbedded with marine sediments, exposed in stratigraphic superposition, and from raised-beach sequences that occur at altitudes up to 140 m a.s.l. Chronologic control is provided by AMS 14C, electron-spin resonance, green-stimulated luminescence, and aspartic-acid geochronology. Major glaciations followed by deglaciation and marine inundation occurred during MIS 10-9, MIS 8-7, MIS 6-5e and MIS 5d-3. The MIS 6-5e event, associated with the high marine limit, implies ice-sheet thickness of >2000 m only 200 km from the deep Arctic Ocean, consistent with published evidence of ice grounding at ∼1000 m water depth in the central Arctic Ocean. Till fabrics and glacial tectonics record repeated expansions of local ice caps exclusively, suggesting wet-based ice cap advance followed by cold-based regional ice-sheet expansion. Local ice caps over highland sites along the perimeter of the shallow Kara Sea, including the Byrranga Mountains, appear to have repeatedly fostered initiation of a large Kara Sea ice sheet, with exception of the Last Glacial Maximum (MIS 2), when Kara Sea ice did not impact Severnaya Zemlya and barely graced northernmost Taymyr Peninsula. |
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