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The preburning condition of Chalcolithic cremated human remains from the Perdigoes enclosures (Portugal)

Publication . Godinho, Ricardo Miguel; Goncalves, David; Carlos Valera, António

The Iberian Chalcolithic displayed a remarkable variety of funerary practices, which has been related to interpopulation differences, intrapopulation social-cultural differences, and complex multistage funerary rituals. Perdigoes, a Chalcolithic set of ditched enclosures, reflects such diversity including a wide array of funerary practices. Among those practices is cremation, which, despite relatively rare, is represented in different structures in Perdigoes. One of these structures (Pit 40) presents an unparalleled high minimum number of individuals (n = 240), contrasting with nearby and coeval structures. In this study, we analyse heat-induced bone changes and other archaeothanatological variables to tentatively assess the preburning condition of the human remains. The results of Pit 40 are also compared with other comparable contexts to assess if this unique context presents further funerary differences relative to those other contexts in, for example, body processing. Our results suggest preferential cremation of fleshed human remains, but burning of at least a minority of skeletonised remains and deposition of possibly unburned remains also likely occurred. Body processing appears to be comparable with that of the cremation contexts of Perdigoes but contrasts with that of another nearby context (Dolmen of Olival da Pega 2b) in which burned bones were also found.

2019-09Journal article

Open Access

Multi-isotope approaches to the Neolithic cemetery-cave of Bom Santo (Lisbon): new data and comparisons with fourth millennium BC populations from central-southern Portugal

Publication . Carvalho, AF; Gonçalves, David; Bonilla, Marta Diaz-Zorita; João Valente, Maria

Previous multi-isotopic research on the human remains of the Neolithic cave-cemetery of Bom Santo (Lisbon, Portuguese Estremadura) led to the conclusion that this fourth millennium BC population was very heterogeneous at several levels. Two in particular were subsistence habits and mobility: although consumption of terrestrial foods was the norm, aquatic food sources totalling > 20% of overall diets were detected in 60% of the population, and, surprisingly, 79% of the individuals were classed as non-local, having lived most of their life in geologically older regions. These figures were however obtained on a sample of 15 individuals. Further isotopic analyses have enlarged the original sample to 35 individuals (i.e., half of the exhumed population) and were also employed in the study of the coeval cave-cemeteries of Barrao and Mureta. This has permitted a sounder depiction of past behaviours, with a structural difference being observed at both levels between Bom Santo and the latter sites: at the former cave, 70% of the population consumed > 20% of aquatic foods and 34% were non-local (23% from outside Estremadura), whereas the latter were all local and showed no signals of aquatic diets. Comparison with other fourth millennium BC populations in central-southern Portugal suggests a model where the exploitation of locally available aquatic/marine food sources was not mandatory but optional and that human mobility represented an important socio-economic behavioural feature of these (presumably) segmentary societies. How both aspects related to the then-emerging megalithic phenomenon is a question that should be investigated in future research.

2019-11Journal article

Restricted

Is enamel the only reliable hard tissue for sex metric estimation of burned skeletal remains in biological anthropology?

Publication . Godinho, Ricardo Miguel; Ines, Oliveira-Santos; Pereira Manuel Francisco, C.; Antonio, Mauricio; Carlos Valera, António; David, Goncalves

Sex diagnosis is a crucial element in the analysis of skeletal remains from forensic and archaeological contexts. Thus, researchers have developed several methods using different anatomical regions to estimate sex. Despite such variety of methods, sexing of collective cremated human skeletal remains is still challenging due to heat-induced size changes and fragmentation, along with the typical commingling of collective contexts. This study aims to examine the potential of burned tooth crowns for odontometric sex estimation. To that end, heat-induced size changes were quantified in experimentally heated teeth. Then, odontometric sex estimation was performed in a set of theoretical samples of pre and post-heated tooth crowns. Results show heated tooth crowns undergo variable but consistent and statistically significant expansion, which is due to micro-fracturing. Such heat induced size changes are of sufficient magnitude to impact odontometric sex diagnosis and sex ratios of the theoretical samples. Yet, sexing using heated/burned tooth crowns may still be useful to estimate the minimum number of females in a given sample. Further, the effect of heat-induced size changes may be calculated and removed using mu CT scanning.

2019-08Journal article

Open Access