News

Publication date: June 2017Source:Journal of Archaeological Science, Volume 82 Author(s): Parker VanValkenburgh, Sarah J. Kelloway, Karen L. Privat, Bill Sillar, Jeffrey QuilterThrough Scanning Electron Microscopy (SEM) microstructural analysis, we examine the firing technology of Early Green Glazed (EGG) Ware – a variety of “hybrid” lead-glazed ceramics produced in Peru’s north coast region during the 16th century CE. Previous scholars have interpreted EGG Ware as the product of indigenous potters who fired ceramics in kilns and learned how to make glazed vessels through direct instruction from Iberian ceramicists. We argue that the production of EGG Ware entailed a more complex process of technological incorporation and innovation. SEM microstructural analysis of 44 archaeological samples suggests that these ceramics were originally fired under highly variable conditions. Parallel analysis of five samples of lead-glazed ceramics produced in open firings by Peruvian artisans in the 1980’s reveals consistent firing beyond their clays’ maturation temperatures. Based on these results and analysis of whole EGG Ware vessels from museum collections, we suggest that at least some of our EGG Ware samples were produced in open firings. In turn, we argue that EGG Ware reflects the creativity of native potters who adapted indigenous firing technologies and experimented with different parameters in the process of forging a new decorative tradition.

Publication date: June 2017Source:Journal of Archaeological Science, Volume 82 Author(s): David SmithIntertidal archaeological deposits occur worldwide, particularly in the temperate latitudes. These deposits can contain archaeological sites that were constructed at the time these were terrestrial landscapes, but subsequently were inundated as a result of rising sea levels. Part of this process can include the development of salt marshes. There is a need, therefore, to identify where archaeological sites lie within the cline of past tidal regimes. This paper presents the results of a survey of UK archaeoentomological data recovered from intertidal deposits which was undertaken in order to identify patterns in archaeoentomological data that might indicate a deposit’s position within a saltmarsh. Such an approach has potential to establish ‘indicator groups’ for saltmarsh zones, thereby facilitating archaeological interpretation of intertidal deposits. A statistical ordination of the archaeoentomological dataset has been undertaken to explore the security and strength of proposed archaeoentomological indicator groups for various ecological zones within saltmarsh/intertidal environments and the results are presented here. These indicator groups also are crossed-checked against the known modern ecology of the various beetles included within each grouping, to determine if they make good ‘ecological sense’. The dataset discussed here is specific to Northern Europe, but the approach is applicable worldwide.

Publication date: Available online 4 April 2017Source:Journal of Archaeological Science Author(s): Emmanuel Discamps, Jean-Philippe FaivreThis short contribution presents faunal data from new fieldwork at the Middle Palaeolithic site of Combe-Grenal (Dordogne, France). This important sequence continues to serve as both a reference sequence to which other Western European Middle Palaeolithic sites are often compared and the basis of several models of Neanderthal subsistence and environmental context. However, several researchers have highlighted the likelihood that skeletal part profiles were biased as a consequence of the incomplete recovery methods used during previous excavations at Combe-Grenal. A comparison of faunal remains recovered during new excavations with data from the original collections allows recovery bias induced by previous excavation protocols to be quantified. The unreliability of the original skeletal part profiles is confirmed by our study, while, more importantly and unexpectedly, radical biases in species frequencies were equally identified. These results cast doubts on several interpretive models held to account for variability in Mousterian industries, the evolution of Neanderthal hunting strategies, as well as Pleistocene environmental changes. Furthermore, Combe-Grenal provides an instructive example to archaeologists working on sites with less than ideal recovery methods of faunal material. In such cases, recovery biases may be so substantial than even basic faunal data, such as species lists, prove unreliable.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): J. Revelles, F. Burjachs, N. Morera, J.A. Barceló, A. Berrocal, O. López-Bultó, C. Maicher, M. Le Bailly, R. Piqué, A. Palomo, X. TerradasSeveral taphonomic factors influence the composition of the palynological record especially in archaeological deposits, where human activities alter the representation of taxa. Spatial analysis by a taphonomic approach to the distribution of pollen and non-pollen palynomorphs (NPP) provides useful information about intra-site spaces and environments in the Early Neolithic lakeside settlement of La Draga (Banyoles, NE Iberia). The spatial correlation of algae, lakeshore and aquatic plants and herbs with an economic value, together with eggs of intestinal parasites and spores of coprophilous fungi, evidence a humid and organic environment beneath a hut, where consumption waste is concentrated. In contrast, high values of arboreal pollen (AP) and spores of fungal indicators of soil erosion show a sub-aerial environment strongly altered by taphonomic processes in outside areas. Finally, the association of the highest values in Cerealia-t and the spatial distribution of grinding stones within Sector D identifies an area of cereal processing, proving the suitability of spatial analysis in archaeopalynology as a powerful tool for reconstructing activity areas within archaeological settlements.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): Christian Horn, Isabella C.C. von HolsteinThe presence or absence of use-wear marks on copper (Cu)-alloy weaponry has been used since the late 1990s to investigate the balance between functional (combat) and symbolic (value, status, religious) use of these objects, and thus explore their social and economic context. In this paper, we suggest that this work has not taken sufficient account of the material properties of Cu-alloys. We discuss mechanisms of plastic deformation, incremental repairs and corrosion in detail to show how these can obscure use-wear traces. In a survey of Cu-alloy weaponry from the Nordic Bronze Age (1800/1700–550 BCE) from Denmark, Sweden and Germany, we show that corrosion of Cu-alloy objects is strongly linked to depositional context, being greater in burials (both inhumations and cremations) than hoards or as single objects. A relative paucity of use-wear marks on burial weapons should therefore not be used to argue that these were purely symbolic objects, e.g. in contrast to the better preserved hoard material. We propose that use-wear traces on Cu-alloy weaponry, particularly on blade edges, is significantly more elusive than previously realised, and that undamaged objects have been over-identified.

Publication date: Available online 9 April 2017Source:Journal of Archaeological Science Author(s): Stefani A. Crabtree, Lydia J.S. Vaughn, Nathan T. CrabtreeAnalyzing how humans interacted with (and within) their greater ecosystems facilitates a more nuanced understanding of past lifeways. In this aim, we use food web modeling to reconstruct the biotic environment of Ancestral Pueblo people living in the central Mesa Verde region between A.D. 750 and A.D. 1300. This framework enables an investigation into the effects of species introductions and removals by linking humans to the species they consumed. We combine a diachronic examination of multiple archaeological assemblages with a database of every modern non-invasive species and their feeding links in a 4,600 square kilometer area of southwestern Colorado. Although human omnivory provided some flexibility, high population density likely curtailed the ability to prey switch. Ultimately, these factors combined to decrease the resilience of Ancestral Pueblo people to environmental changes.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): Renata Zocatelli, Marlène Lavrieux, Typhaine Guillemot, Léo Chassiot, Claude Le Milbeau, Jérémy JacobThis paper presents the potential of 5β-stanols and bile acids to act as fecal source biomarkers in order to identify and characterize past agropastoral activities in archaeological and natural archives. First of all, a molecular inventory of 5β-stanols and bile acids was made on fresh fecal human and domestic animal samples, using the same methodology to define the specificity of these molecular biomarkers. The selected species were cow, horse, pig and sheep as they are the major domestic species present in European archaeological sites. To our knowledge, our work constitutes the first report on fecal biomarkers in sheep feces. Bile acids can distinguish diet regime and species having the same diet with greater specificity than 5β-stanols. Fresh human fecal material and historical/archaeological fecal material were analyzed to assess their stability through time by calculating the coprostanol/epi-coprostanol (Cp/epi-Cp) and deoxycholic acid/cholic acid (DOC/C) ratios. Results show that bile acids are more resistant to diagenesis than 5β-stanols, at least on a 700-year time scale. Human and domestic animal fecal molecular imprints were then compared to the molecular content of 65 samples retrieved from archaeological sites, soils and lacustrine sediments to test their ability to trace past land-use dynamics. This study is the first to combine bile acids and 5β-stanols to identify a source of fecal material in lacustrine sediments. The combination of sterols and bile acids can be used in a variety of natural archives and archaeological contexts to define the origin of fecal material, to specify land-use, and to reconstruct past pastoral practices at various spatio-temporal scales.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): D.J. Huisman, J. van der Laan, G.R. Davies, B.J.H. van Os, N. Roymans, B. Fermin, M. KarwowskiThe composition of 2977 Late Prehistoric glass objects was investigated to derive information on the nature of the colourants used. 2673 Late Iron Age Celtic (La Tène) bracelet fragments from the Netherlands and Austria and 51 Early Iron Age beads from the Netherlands were analysed. Hand-held XRF analyses demonstrated that all glass objects were of the soda-silica-lime type, which has a presumed origin in the Eastern Mediterranean. Copper was used as colourant, in the form of copper filings, in most of the Early Iron Age glass beads to give recycled glass a blue-green colour.The vast majority (98%) of the translucent Iron Age glass, was coloured using cobalt (blue), manganese (purple; colourless), antimony (colourless) and iron (green). Manganese, however, was added to all glass, contributing additional amounts of elements like copper, cobalt and iron. Opaque decorations were produced using antimony, or a combination of tin and lead.REE analyses on a selection of representative objects indicate that the manganese ores in translucent glass are of hydrogenetic-diagenetic (Early Iron Age) or hydrothermally influenced diagenetic (Late Iron Age) types. Strontium isotope ratios show mixing between a calcite-related seawater source (0.709) and manganese ores with isotope ratios of ∼0.70766. Lead isotope ratios are dominated by colourant-derived Pb. The isotope ratios of the manganese used to produce translucent glass and lead used for opaque glass decorations fall in the same range. The most likely general provenance of both lies on Lavrion or the Western Cycladic Islands, although an origin in the central Taurus or the Sinai mountains cannot be excluded. The conclusion is that manganese ore used for colourants contributes significantly to the REE concentration in the glass, including Nd, as well as to Sr and Pb. This needs to be taken into account when using concentrations or isotope ratios of these elements for provenancing other raw materials like sand and calcium carbonate. This appears to be the case for all antique soda-lime-silica glass.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): William Timothy Treal Taylor, Burentogtokh Jargalan, K. Bryce Lowry, Julia Clark, Tumurbaatar Tuvshinjargal, Jamsranjav BayarsaikhanArchaeological horse remains from Mongolia’s late Bronze Age Deer Stone-Khirigsuur (DSK) culture present some of the oldest direct radiocarbon dates for horses in northeast Asia, hinting at an important link between late Bronze Age social developments and the adoption or innovation of horse transport in the region. However, wide error ranges and imprecision associated with calibrated radiocarbon dates obscure the chronology of early domestic horse use in Mongolia and make it difficult to evaluate the role of processes like environmental change, economic interactions, or technological development in the formation of mobile pastoral societies. Using a large sample of new and published radiocarbon dates, this study presents a Bayesian chronological model for the initiation of domestic horse sacrifice at DSK culture sites in Mongolia. Results reveal the rapid spread of horse ritual over a large portion of the Eastern Steppe circa 1200 BCE, concurrent with the first appearance of draught horses in China during the late Shang dynasty. These results suggest that key late Bronze Age cultural transformations – specifically the adoption of mobile pastoralism and early horseback riding – took place during a period of climate amelioration, and may be linked to the expansion of horses into other areas of East Asia.

Publication date: May 2017Source:Journal of Archaeological Science, Volume 81 Author(s): Deodato Tapete, Vanessa Banks, Lee Jones, Matthew Kirkham, Daryl GartonArchaeological models of past human occupation of the landscape build upon the understanding of the natural palaeo-environment. This cognitive process relies on the study of the sediment units at a level of spatial resolution that might not be achieved with available maps. This paper presents a new approach to combine traditional ground investigation methods and new technologies to detect, extract and analyse stratigraphic records, with particular application to vanishing landscapes with limited exposure of the sediments. The demonstration site is Farndon Fields, an extremely rare Late Upper Palaeolithic open-air site at the southern outskirts of Newark-on-Trent in Nottinghamshire, UK. Since the early 1990s when the upgrading of the new A46 road was planned, ground and archaeological investigations have been carried out. The test-pitting undertaken by Farndon Archaeological Research Investigations (FARI) in the field 373A in September 2015 offered an ideal occasion for the British Geological Survey (BGS) to test the methodology. A palaeo-geographic understanding from regional to local scales is here proposed based on 5-m airborne Light Detection and Ranging (LiDAR) data and multispectral aerial photographs of the site prior to the alteration due to the A46 works. Features of the palaeo-landscape are vanishing and intrusive investigations are required to unveil the presence of the archaeological context. Samples were taken for particle size analysis of the sediment units to characterise the aeolian sand deposits (‘coversands’) and the underlying clayey silty sandy sediments interbedded with paler laminae. For the first time state-of-the-art terrestrial LiDAR technology was used for stratigraphic profiling, strata delineation and geological feature extraction based on the intensity return and surface roughness. The combined use of point clouds, 3D models and cloud intensity from terrestrial LiDAR provides an added level of confidence to the ability to subdivide the sediment units and discriminate them from ploughsoil. Internal bedding of the coversands is enhanced in the LiDAR elaborations. This is new evidence not otherwise observed by the naked eye. On the other side, the classification of point clouds by roughness index seems promising for recording the grading of the sediments. The experiment in Farndon Fields therefore demonstrates the benefit of phased technology-based investigation combining archaeology and geology towards a more cost-effective assessment through strategic sampling and digital recording of landscape domains.