The well-preserved Late Neolithic dolmen burial of Oberbipp, Switzerland. Construction, use, and post-depositional processes

Excavation of the Late Neolithic dolmen of Oberbipp BE, Steingasse in the Swiss Central Plateau provided a unique opportunity for a comprehensive study of the archaeological and anthropological evidence. In multidisciplinary studies, we investigated the processes at work during construction, use, and abandonment of the megalithic structure, as well as the dietary habits, subsistence strategy, and possible mobility of the Neolithic population. Archaeological methods included micromorphology, archaeobiology, typology, use-wear analysis, and geology. The anthropological investigation was complemented by an analysis of stable isotope ratios and palaeogenetics. Local topography and the cover of alluvial sediments ensured an extraordinary conservation of the monument. It allowed the preservation of the human remains of at least 42 individuals of both sexes and all ages. The observation of the sedimentary and post-depositional processes, supplemented by an extensive series of radiocarbon dates, allowed us to reconstruct the history of the dolmen in its environment and the definition of at least two deposition phases. We found genetic evidence of lactase intolerance, a local population with a mixed ancestry of early Anatolian farmers and Western hunter-gatherers, and a crop-based diet. Sparse remains of a nearby Late Neolithic settlement sustain the interpretation that this is the burial site of a local farming community. Evidence of higher mobility of females and kinship over three generations solely in the paternal line suggests a virilocal community. Bone-altering pathologies support the assumption of a caring society.

Automated summary

The Late Neolithic dolmen in Oberbipp BE, Switzerland, provides a unique opportunity for interdisciplinary research in archaeology and anthropology. Through comprehensive studies, the construction, use, and abandonment processes of the megalithic structure were investigated, along with the dietary habits, subsistence strategy, and mobility of the Neolithic population. The examination of archaeological methods, including micromorphology, archaeobiology, typology, use-wear analysis, and geology, was complemented by anthropological investigations using stable isotope ratios and palaeogenetics. The remarkable preservation of the monument, due to the local topography and alluvial sediments covering it, allowed for the analysis of human remains and the reconstruction of the dolmen's history in its environment.