Kathleen McSweeney

A freshwater diet-derived 14C reservoir effect at the Stone Age sites in the Iron Gates gorge

Human bones from single inhumation burials and artifacts made from terrestrial mammal (ungulate) bone found in direct association with the skeletons were obtained from the Stone Age site of Schela Cladovei situated just below the Iron Gates Gorge of the River Danube. The results of stable isotope analyses of the human bone collagen are consistent with a heavy dependence on aquatic protein while radiocarbon dating of the samples reveals an offset of 300-500 years between the two sample types, indicating a freshwater reservoir effect in the human bone samples. Since protein consumption is by far the major source of nitrogen in the human diet we have assumed a linear relationship between delta (super 15) N and the level of aquatic protein in each individuals diet and derived a calibration for (super 14) C age offset versus delta (super 15) N which has been applied to a series of results from the site at Lepenski Vir within the gorge. The corrected (super 14) C ages (7310-6720 BP) are now consistent with the previous (super 14) C age measurements made on charcoal from related contexts (7360-6560 BP). In addition, the data indicate a change from a primarily aquatic to a mixed terrestrial/aquatic diet around 7100 BP and this may be argued as supporting a shift from Mesolithic to Neolithic. This study also has wider implications for the accurate dating of human bone samples when the possibility exists of an aquatic component in the dietary protein and strongly implies that delta (super 15) N analysis should be undertaken routinely when dating human bones.

Mesolithic and Early Neolithic in the Iron Gates: A Paiaeodietary Perspective

Abstract This paper is a study of diet and subsistence among Mesolithic and Early Neolithic populations in the Iron Gates section of the Danube Valley, with emphasis on the sites of Lepenski Vir and Vlasac in Serbia and Schela Oadovei in Romania. The first part of the paper reviews the evidence of animal and plant residues and human skeletal indicators; the second presents new data from stable isotopic analyses of human bone supported by AMS 14C dates. Isotopic and dental evidence suggest that Mesolithic people prior to 7600 BP had high protein diets in which the bulk of the protein was derived from riverine food sources. Significant differences are evident between the isotopic signals of Mesolithic males and females buried at Vlasac and Lepenski Vir, indicating differences in overall diet. These differences are most easily explained in terms of movement of individuals between groups, linked to the practice of local group exogamy. A shift in dietary pattern occurred at Lepenski Vir between ca 7600 and 730...

Problems of dating human bones from the Iron Gates

It is widely recognized that when marine resources form a significant proportion of the human diet, this results in radiocarbon ages for human remains that are significantly older than the contemporary atmosphere. While there has been widespread assessment of marine 14C reservoir ages, there has been little study of the freshwater equivalent. However, recent analyses of human bone from archaeological sites in the Danube Valley have confirmed the existence of a large freshwater 14C reservoir effect.

Chronological and dietary aspects of the human burials from Ajdovska Cave, Slovenia

Ajdovska Jama (The Pagans Cave) in southeast Slovenia lies within the catchment of the River Sava, a major tributary of the Danube. The site is well known for its Neolithic burials and has been excavated to a high standard on various occasions since 1884. The human remains at the site occurred as distinct clusters of mainly disarticulated bones belonging to at least 31 individuals. Hitherto, dating of the burials has been based on the associated archaeological finds, including a few low-precision radiometric radiocarbon measurements on charred plant material. In the present study, bones from 15 individ- uals were subsampled for accelerator mass spectrometry (AMS) and stable isotope analyses. These comprised adults and chil- dren from 3 of the clusters. The results of the study indicate that the burials all belong to a relatively short time interval, while the stable isotope data indicate a mixed diet based on C3 plant and animal food sources. These interpretations differ somewhat from those of previous researchers. The AMS 14C and stable isotope analyses form part of a wider investigation of dietary and demographic change from the Mesolithic to the Iron Age in the Danube Basin.