Letter from the vatican: 26 April 2015

This narrative deals with the author's experiences while attending a human trafficking panel at the Pontifical Academy of Social Sciences (PASS) in the Casina Pio IV, Vatican City, 7–21 April 2015.     

GEOCHEMICAL CHARACTERIZATION OF ARCHAEOLOGICAL LIME MORTARS: PROVENANCE INPUTS*

Chemical and mineralogical analyses were carried out on historical lime mortars from the parish church of Santa María La Real (Guipúzcoa). The study included various periods ranging from Roman to modern times and allowed the identification of various types of raw materials. In order to obtain pure binder, free of carbonate aggregates and charcoal particles, an innovative binder separation method was implemented. The chemical composition of the binder allows discrimination of different provenance areas for the raw materials, although those areas do not correlate with specific historical periods. In addition, the influence of burial processes on the primeval chemical features has been assessed and reveals that modern mortars display greater chemical modification than the Roman mortars.     

薄荷醇提取秦俑坑出土彩绘遗迹的性能评估研究

薄荷醇作为新型的考古发掘现场临时固型提取材料,已经在秦俑一号坑的考古工地上得到了成功应用,但是关于薄荷醇实施提取的安全性能评估还需要深入研究。本实验开展了薄荷醇在秦俑一号坑考古发掘现场的遗迹(土壤和彩绘漆皮)上的实验室性能评估;采用压汞法研究了薄荷醇处理前后秦俑土颗粒的孔隙结构变化;采用超景深三维视频显微镜考察了薄荷醇施加并挥发过程中秦俑土和彩绘漆皮的显微结构变化;采用GC-MS分析了薄荷醇的残留;对薄荷醇挥发过程中在文物遗迹基底上的再结晶现象进行了讨论。研究结果表明,薄荷醇提取遗迹后不会破坏秦俑土的物理结构,彩绘漆皮形貌完好,作为考古发掘现场遗迹提取材料,薄荷醇在出土秦俑彩绘遗迹上使用时是安全的。     

PIGMENT IDENTIFICATION IN GREEK POTTERY BY RAMAN MICROSPECTROSCOPY*

Raman microspectroscopy (RMS) is now established as a key technique for the identification of pigments of archaeological pottery that permits the in situ study of art objects by a non‐destructive procedure. The information obtained represents a great aid to restoration and conservation techniques. In this work, the chemical nature of the red, black and white pigments of five samples of Greek pottery from the end of the fifth century and the first half of the fourth century bc , exhumed from the Iberian necropolis of Cabezo Lucero (Guardamar del Segura, Alicante, Spain), has been identified. The black and the red pigments are found to be magnetite (Fe₃O₄) and hematite (α‐Fe₂O₃), respectively. The white pigment is found, for the first time, to be composed of alumina (α‐Al₂O₃ and γ‐Al₂O₃) probably yielded by the thermal decomposition of Greek bauxite.     

Age‐at‐Death Estimates from a Disarticulated,Fragmented and Commingled Archaeological Battlefield Assemblage

Estimation of age‐at‐death is an important and challenging part of any investigation of human remains. Extensive research has been undertaken on this subject as demographic information contributes much to bioarchaeological and forensic work. Disarticulated, fragmentary and commingled human remains occur from a wide range of spatial and temporal contexts, and estimation of age‐at‐death can be particularly challenging in these collections. This study evaluated the impact of preservation on techniques that might be applied and their relative utility, using human remains from the site of the Smith's Knoll associated with the Battle of Stoney Creek, a War of 1812 collection from Ontario Canada with some supporting documentary evidence on age‐at‐death. Features assessed were the pubic symphysis, auricular surface and epiphyseal fusion in the innominate. An age‐at‐death estimate was produced for 16 out of 19 individuals considered; the highest minimum number of individuals (MNI) was 24 (right radius) from 2701 identifiable fragments. The pubic symphysis made no contribution to construction of a demographic profile, but as has been suggested previously epiphyseal fusion was useful in this respect. Results demonstrate that previous statements regarding preservation of the auricular surface and its utility in fragmented and poorly preserved collections need to be carefully evaluated. Although 129 fragments of innominate were recorded just one had an auricular surface and post auricular area that could be fully assessed. Transition Analysis was easier to apply than techniques developed previously, and findings from this study suggest that use of the forensic prior distribution could assist in assessment of battlefield assemblages. These results raise some valuable points that need to be considered in any future attempts to improve age‐at‐death estimates using the auricular surface, and important questions regarding expectations for estimation of age‐at‐death in disarticulated, fragmented and commingled collections of human bone. Copyright © 2015 John Wiley & Sons, Ltd.     

Isotopic Evidence for Marine Consumption and Mobility in the Atacama Desert (Quillagua,Northern Chile)

Archaeological research in the Atacama Desert has recovered evidence of considerable cultural variability. This variability seems to have increased during the Late Intermediate Period (AD 950–1400). The oasis of Quillagua, located at the margins of the Loa River in northern Chile, between the Andes and the coast (70 km from the Pacific Ocean), has shown important evidence regarding this cultural diversity. The variety in the archaeological evidence found at Quillagua has been interpreted as the result of two different cultural influences at the oasis: the Pica‐Tarapacá who occupied the coastal and inland regions to the north of Quillagua and the Atacama who occupied the oasis and fertile areas southeast of Quillagua. Here, we present the results of stable carbon, nitrogen and oxygen isotope analyses of 23 individuals recovered from the Cementerio Oriente in Quillagua, in order to test whether the observed cultural variability is also reflected in diet and mobility patterns. Results from carbon and nitrogen isotope measurements indicate the importance of marine protein, as well as a contribution of maize in the diet of some individuals. Four individuals show low δ¹⁸O values, suggesting a possible highland or non‐local origin, whereas values for the remaining individuals are consistent with lowland populations. Together, the results support the idea that the Quillagua oasis represented an important site of interaction between the Tarapacá and Atacama cultures, with close contacts with the coast but also with the presence of individuals from the highlands. Copyright © 2015 John Wiley & Sons, Ltd.     

New Evidence for Fish Processing in the Ancient Eastern Mediterranean: Formalised Epinephelus Butchery in Fifth Century bc Kinet Höyük,Turkey

Archaeological evidence for fish preparation in the Eastern Mediterranean is scarce. A Late fifth century deposit at Kinet Höyük provides tangible evidence for the systematic butchering of large individuals of Epinephelus (groupers), and possibly of Mugilidae (mullets), and Clarias gariepinus (African catfish). Butchery marks on head and proximal trunk regions of groupers follow a consistent pattern, indicating the processing of large fish heads for, apparently, local redistribution and consumption at the settlement. Although elements of the vertebral column remaining between the atlas and the ultimate vertebra are virtually absent in the assemblage associated with these butchered fish remains, this differential representation of elements does not appear to be an unequivocal reflection of fish processing techniques and subsequent trade. The insufficiency of research on ancient fisheries and fishing in the Eastern Mediterranean poses an obstacle to contextualise this deposit within a general historical and archaeological framework. Copyright © 2014 John Wiley & Sons, Ltd.     

Image‐Based Modelling from Unmanned Aerial Vehicle (UAV) Photogrammetry: An Effective,Low‐Cost Tool for Archaeological Applications

The recording and 3D modelling of complex archaeological sites is usually associated with high capital and logistical costs, because the data acquisition must be performed by specialists using expensive surveying sensors (i.e., terrestrial laser scanners, robotic total stations and/or ground‐penetrating radar). This paper presents a novel, low‐cost, user‐friendly photogrammetric tool for generating high‐resolution and scaled 3D models of complex sites. The results obtained with unmanned aerial vehicle (UAV) photogrammetry of an archaeological site indicate that this approach is semi‐automatic, inexpensive and effective, and that it guarantees quality.