Social Buildings: Soil Geochemistry and Anthropogenic Patterns from Late Iron Age Finland

Abstract

ABSTRACT We present geochemical data of soils sampled from two Late Iron Age (a.d. 550–1050) buildings at Bartsgårda on the Åland Islands, Finland. The houses had different constructions and use-patterns, one being an intensively used dwelling house, rich in finds, whereas the other, scarce in finds, had a more specialized character, linked to ceremonial rather than domestic activities. Systematic and targeted feature sampling was carried out to analyze 190 samples using energy dispersive X-ray fluorescence spectrometry (ED-XRF) to 1) identify floor/activity levels in the houses based on vertical and horizontal geochemical anomalies; 2) compare the anthropogenic activity signals of the buildings; and, 3) test a rapid and cost-efficient ex situ analytical strategy for geochemical characterization of archaeological soils. Although the long-term use of the site as a livestock paddock introduced some complexities, based on the geochemical and micromorphological data, the houses had several activity levels and markedly different anthropogenic profiles.