Bone histology of human remains from the Late Holocene of Northwestern Patagonia, Argentina: a multidimensional taphonomic approach

Abstract

This study presents the first histological results on human remains recovered from Late Holocene archaeological sites from Northwestern Patagonia, Argentina, from a multidimensional taphonomic perspective. The burial sites come from different geoenvironmental contexts. The main purpose of this work is to assess the influence of geoenvironmental factors on taphonomic history of human bones. The bone microstructure of eleven human femora was analyzed through thin sections and four of them also with scanning electron microscopy. The relationship of these parameters with a set of geoenvironmental variables was assessed by means of different uni-, bi-, and multivariate statistical analysis. Results indicate that the geoenvironmental contexts led to different preservation of the microstructure of skeletal remains, represented by two different patterns. Bones with the best histological preservation were associated with semi-arid to arid geoenvironmental characteristics and the worst preserved ones with subhumid to humid features. Interestingly, samples from the better-preserved pattern showed staining and microcracks, whereas bioerosion is associated with the poorly preserved ones. A weak incidence of sex and chronology was found on microstructure preservation. Finally, the effects of weathering on naturally unearthed bones were deeply destructive in a short period of time. This work highlights the power of a multidisciplinary approach to discern the taphonomical pathways in archaeological sites.