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A new middle Holocene varve diagram from the river Ångermanalven, northern Sweden: indications for a possible error in the Holocene varve chronology
Authors:BARBARA WOHLFARTH  SVANTE BJÖRCK  INGEMAR CATO  GÖRAN POSSNERT
Institution:Department of Quaternary Geology, University of Lund, Tornavägen 13, S-22363 Lund, Sweden;Geological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;Geological Survey of Sweden, Box 670, S-751 28 Uppsala, Sweden;Tandem Laboratory, Box 533, S-75121 Uppsala, Sweden
Abstract:A new varve diagram from the river Ångermanälven could be correlated to the postglacial varve chronology to between 4903 and 4415 varve years BP. An AMS 14C measurement on terrestrial macrofossils obtained between 4715 and 4706 varve years BP gave a calibrated age of between 5730 and 5040 calendar years BP. The discrepancy between varve and calender-year age indicates that an error or part of an error in the Swedish varve chronology may be situated between 2000 and 5000 varve years BP.
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