Dying in the Hallstatt Plateau: the case of wooden coffins from Iron Age necropolises in Mallorca (Balearic Islands, Western Mediterranean) and the difficulties in defining their chronology

Iron Age archaeology in Europe and the Mediterranean often faces significant difficulties to establish precise chronological frameworks by means of radiocarbon dating due to the so-called Hallstatt Plateau. This problem worsens in those archaeological sites excavated decades ago with a lack of stratigraphic control of the objects recovered. The archaeological studies carried out in Iron Age funerary contexts from Mallorca (Balearic Islands) are greatly affected by these two distorting factors. Therefore, it has been difficult to establish an accurate chronology for the origin and abandonment of certain individualization practices, such as the use of wooden coffins in collective necropolises. The goal of this paper is to overcome these limitations and to define the most reliable chronological framework for this funerary phenomenon by applying a multi-proxy approach. Thus, the chronological information provided by the detailed typological study of the material culture associated with the wooden coffins was connected to the results obtained from an extensive series of new radiocarbon dating of the wooden coffins. In addition, a wiggle-matching analysis (different(14)C dates for the same wooden object corresponding to individual tree-rings) was also conducted in some wooden coffins in order to enhance the precision of the radiocarbon dates. Accordingly, the direct and indirect chronological information show that the use of wooden coffins in Mallorca started around 800-750 cal BC and was abandoned at c. 350-300 cal BC.