4.6 Article

A chronology of depositional coastal landforms of the Baltic Sea: Luminescence dating of sandy sediments and patterns of human settlement at the ancient Ventspils Lagoon

期刊

ESTUARINE COASTAL AND SHELF SCIENCE
卷 279, 期 -, 页码 -

出版社

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ecss.2022.108135

关键词

Baltic sea; Shorelines; Baltic ice lake; Ancylus; Littorina; OSL dating; Radiocarbon dating; Mesolithic; Neolithic

资金

  1. Science Council of Latvia
  2. [LZP-2018/1-0171]

向作者/读者索取更多资源

The ancient Ventspils Lagoon has been studied using optically stimulated luminescence dating (OSL) to determine its development and age, revealing a wide age range and different stages of development.
The ancient Ventspils Lagoon is an area where human settlements have been located on former coastal landforms and sediments. However, the chronology of its development has so far not been studied in detail. Since the ancient lagoon is dominated by sand deposition, optically stimulated luminescence dating (OSL) was used to determine when the ancient coast was formed. Twenty-one OSL samples gave a wide age range, between 8.57 +/- 0.65 ka and 73.8 +/- 8.3 ka. Twelve of the ages fall in the Late Glacial and Holocene and document the devel-opment of the lagoon between the Baltic Ice Lake stage (-16 ka) and the Littorina Sea stage (-8 ka). The new dates correspond to some extent with previously modelled shorelines for the Ventspils Lagoon and to radiocarbon ages from archaeological sites in the area. One date, 16.0 +/- 1.3 ka, falls in the period before the Baltic Ice Lake and represents either a very early Baltic Ice Lake stage or, less likely, the Venta glacial lake prior to the Baltic Ice Lake. One date, 5.09 +/- 0.42, is likely underestimated. Seven samples yielded dates between 21.5 +/- 1.5 ka and 73.8 +/- 8.3 ka, which corresponds to the Early and Middle Weichselian in the Baltic region. The samples in this latter group are likely overestimating the true age due to insufficient exposure to sunlight during deposition.

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