Abstract
Coastal shorelines worldwide are generally unstable and changing. The study of the precise relation between any archaeological site and the shoreline at the time when the site was used is therefore complicated, but still often not met with appropriate methodological approaches. In this article, we test models based on phosphate analysis and discuss how they can be used to detect ancient shorelines. We propose that a model of increased and oscillating phosphate values at the former water level is considered reliable and useful in areas with advancing shoreline.
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Notes
Within the limited coastal areas, the shoreline displacement is also calculated by counting of annual varves in ancient river deltas and lakes or by diatom, pollen and C-14 analysis (see for example in Königsson and Paabo 1981).
Phosphate determination of the first, 70-m-long line of samples was done by Elna Haiba in the laboratory of the Institute of History, Tallinn University, by the citric acid method determining milligrams of P2O5 per 1,000 g dry soil (financed by the Estonian Science Foundation Grant No. 6998).
Phosphate determination of lines 2–4 was done by Kjell Persson in the laboratory of Stockholm University by the citric acid method determining milligrams of P2O5 per 100 g dry soil (Persson 2008).
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Further Reading
The Estonian State Archives 982.1.15 page 13
www.maaamet.ee (map of soils) [15.02.2007]
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Ilves, K., Darmark, K. Some Critical and Methodological Aspects of Shoreline Determination: Examples from the Baltic Sea Region. J Archaeol Method Theory 18, 147–165 (2011). https://doi.org/10.1007/s10816-010-9084-x
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DOI: https://doi.org/10.1007/s10816-010-9084-x