NJG81-2-01
2001
AMS radiocarbon dating of glacigenic sediments with low organic carbon content- an important tool for reconstructing the history of glacial variations in Norway
81
2
82-519-1694-1

In this paper we present and examine a comprehensive series of dates (> 200), which underpins a new reconstruction of ice-sheet fluctuations along nine transects extending from inland to the coast in Norway. Sediments with low organic content dominate the dated materials, particularly from the inland sites, some of which may have a marine origin. Consequently, the new dates reported here, include mainly 14C-dates of bulk organic sediment samples. The geochronology of sites located in coastal areas is mainly based on shell dates. A considerable number (> 100) of previously published dates are also employed, both as 'control dates' for the new synthesis, and as components of the overall geochronological data base. The data base also includes I4C-dates of bones and calcareous concretions, U/Th-dates of speleothems and calcareous concretions, and TL/OSL-dates of wind-blown and water-lain sand. Brief reference is also made to relative age estimates based on amino acid analyses and correlation using magnetostratigraphy. The accuracy and precision of the chronology is exarnined on a millennium scale. The dates give ranges of ages which provide a coherent chronology of tl!e stratigraphic succession and of the main events, which span the Middle to Late Weichselian interval.

Olsen, L. 1, Van der Borg, K. 2, Bergstrøm, B. 1, Sveian, H. 1, Lauritzen, S.-E. 3 & Hansen, G.4; l) Geological Survey of Norway, N0-7491 Trondheim, 2) University of Utrecht, R.J. Van de Graaff laboratorium, P. O.Box 80.000, 3508 TA Utrecht, The Netherlands, 3) Geol. Inst., University of Bergen, Allegt. 41, N0-5007 Bergen & 4) Surface Geochemical Services AS, P. O. Box 1257 Vika, N0-0111 Oslo, Norway.
Corresponding author: Lars Olsen (e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)