An X-ray Diffraction (XRD) and X-ray Fluorescence (XRF) investigation in human and animal fossil bones from Holocene to Middle Triassic

We examined by Rietveld refinement of X-ray Diffraction patterns a series of 61 human and animal fossil bones in an age range from present time to Middle Triassic (around 245 Ma). This approach, supplemented by elemental analysis according to X-ray Fluorescence, has permitted to obtain a quantitative evaluation of the mineralogical phases in the specimens, thus allowing to reconstruct the mineralization process involved. Concerning the apatite phase, after adopting a monoclinic geometry for the unit cell, the method permits to determine with fair degree of precision the unit cell volume, which is found to decrease in relatively short geological times as a function of the fluorine substitution process for the hydroxyl group –OH. After excluding the role of a high-temperature fire treatment to the bones, it is found that a certain linear correlation may exist over the geological time scale involved between the age of the specimen and the average crystallite size. This observation permits to use the XRD pattern as an evaluation of the age of the fossil, although the stratigraphic observations, where available, remain as the main reliable source for dating such biomaterials. The uncertainty related to this age estimation may be hardly better than 15–20% in absolute, because of various assumptions involved in the XRD methodology used and in the variability of the burial environment that may be subjected to discontinuous changes over the very long time of deposition.     

Disentangling long bones of foxes (Vulpes vulpes and Alopex lagopus) from arctic archaeological sites

To discern the presence of two anatomically close species within an archaeological assemblage is always a problem for the analyst. A particularly interesting case is the distinction between the red fox (Vulpes vulpes) and the arctic fox (Alopex lagopus), which is often determined using non-rigorous criteria and producing results that must be regarded with caution. Classical methods for separating these two species and determining sexual dimorphism, and eventually the sex ratio, such as analyses using uni- and bivariate plots, are based on arbitrarily fixed limits between sexes. In this text, a more robust statistical method termed mixture analysis (MA) is used to determine the species of limb bones from foxes. First, the MA is applied to a sample of each species using metric data taken from a collection of present-day fox skeletons. Afterwards, the MA is applied to archaeological samples dated to the Dorset period and retrieved from the Tayara site (near Salluit, South Hudson Strait, Nunavik). The results clearly demonstrate that the greatest length (GL) of long bones, especially the humerus and tibia, is the best measurement for distinguishing the species, followed by the distal breadth and the proximal breadth; and that GL is better suited for sexing foxes. The results of MA applied to the Tayara site collection lead to the conclusion that the red fox is present along with the arctic fox among the assemblage, and that there is no fox body size change during the last two millennia in the Eastern Arctic.     

Post-medieval sheep (Ovis aries) metapodia from southern Britain

The ‘improvement’ of sheep (Ovis aries) in southern Britain during the post-medieval period is examined using measurements taken on the metacarpals and metatarsals from the late 18th to 19th centuries AD site of Tumbling Fields, Tiverton, Devon. This data set is a rare and important metric archive from which is derived information on the conformation (size and shape) of sheep. Comparisons are presented from other medieval and post-medieval sites, which demonstrate that Tumbling Fields is comparable to other sites of a similar period. The comparisons presented also reveal temporal variation with bones from later sites being taller and more robust on average than those from earlier sites. In addition, the abnormalities of sheep (O. aries) metapodia are examined. In particular, two different conditions are discussed: small, oval cavities in the proximal articulation of the metacarpals, and a ridge of bone on the proximal anterior shaft of the metatarsals. Comparisons are presented from other medieval and post-medieval sites, and potential aetiologies are discussed.     

Cooked Bones? Method and Practice for Identifying Bones Treated at Low Temperature

Is it possible to determine low‐temperature cooking in archaeological bones? The indirect exposure of bones to fire at low temperature (≤ 100 °C), linked to cooking, produces macroscopic modifications on these bones. These modifications have not been clearly or systematically described previously. Instead, physicochemical changes at nanometric level are only now beginning to be understood. In this paper, our principle aim is to explore new methods and techniques that correlate macroscopic features such as smoothness or light transparency with physicochemical characterization results that could aid towards detecting cooked bones in the archaeological record. This study then selected 11 archaeological samples, both human and non‐human. Bones were considered to be thermally treated or not, on the basis of macroscopic criteria. Complementary characterization techniques were used to study morphology (scanning electron microscopy and small angle X‐ray scattering), structure (X‐ray diffraction and transmission electron microscopy), local composition (energy‐dispersive X‐ray spectroscopy) and texture (gas adsorption). Indeed, fractal dimension, particle size, crystalline percentage or specific surface area may well explain some of the macroscopically observed modifications on these samples. The possibility that such apparent modifications may also be due to diagenesis is also considered. From an archaeological point of view, the results are promising. Our characterization of human and non‐human bones demonstrates that physicochemical techniques are complementary and provide good criteria against which to distinguish boiled from un‐boiled archaeological samples. Copyright © 2013 John Wiley & Sons, Ltd.     

Stable Isotope and Radiocarbon Dating of the Remains of the Medieval Royal House of Aragon (Spain) Shed Light on Their Diets,Life Histories and Identities

The remains of 20 individuals buried in three different pantheons, putatively pertaining to the medieval Royal House of Aragon, were analysed for their isotope (¹⁴C, ¹³C and ¹⁵N) measurements. The radiocarbon dates and stable isotope data contributed to identifying individual members and, combined with additional osteological and taphonomic information, as well as documentary evidence, provided a fuller picture of the diets and life histories of particular people. This group comprised the first members of a royal dynasty that ruled the Kingdom of Aragon before the Spanish Crown was established, and that played a significant role in the reconquest of the Iberian Peninsula from Muslim control, this being of paramount importance in the Spanish and European history.     

The lower jaw and dentition of the traversodontid Exaeretodon riograndensis Abdala,Barberena & Dornelles,from the Brazilian Triassic (Santa Maria 2 Sequence,Hyperodapedon Assemblage Zone)

Exaeretodon riograndensis Abdala, Barberena, & Dornelles, 2002 Abdala, F., Barberena, M.C. and Dornelles, J.E.F. 2002. A new species of the traversodontid cynodont Exaeretodon from the Santa Maria Formation (Middle/Late Triassic) of Southern Brazil. Journal of Vertebrate Paleontology, 22: 313–325. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar] is the most abundant traversodontid preserved in the basal Santa Maria 2 Sequence (Hyperodapedon Assemblage Zone), southern Brazil and is closely related to Exaeretodon argentinus Cabrera, 1943 Cabrera, A. 1943. El primer hallazgo de terápsidos en la Argentina. Notas del Museo de La Plata, Paleontología, 8: 317–331.  [Google Scholar] from the Ischigualasto Formation, Argentina. Previous anatomical studies of E. riograndensis have focused mainly on cranial material and little is known about the morphology of its lower dentition or postdentary bones. We describe the first fairly complete postdentary series of the mandible of E. riograndensis and provide additional information on its lower dentition. The postdentary bones of E. riograndensis include a complex coronoid, an angular with a delicate reflected lamina and a stout retroarticular process of the articular, contrasting with the morphology reconstructed for Argentinean specimens, which possess a small retroarticular process. Apart from that, the postdentary bones do not differ significantly from those known for E. argentinus, a fact expected due to the great similarity between other skeletal features of these species. Furthermore, the lower postcanines of E. riograndensis have virtually the same structure as those of E. argentinus, with an approximate quadrangular shape in occlusal view. Moreover, the transverse cusp row is placed anteriorly and comprises a lingual and a buccal cusp, and the occlusal basin delimited by the four main cusps is relatively deep. The new material does not add any taxonomically diagnostic features to E. riograndensis. However, the fossils greatly improve our understanding of the anatomy of the Brazilian species.     

Fish bones from the Old Town of Helsinki (Finland) sixteenth–seventeenth century

Historical sources, such as tax rolls and accounts, can provide information about mediaeval fishing and fish trade, but this subject can also be investigated through archaeological methods. Archaeological research on the mediaeval and early historical fishing in Finland has not been undertaken in any detail. Research from neighbouring areas, mainly Sweden and Estonia, has provided information about mediaeval fishing in northern Europe. This paper presents the results of a osteological examination of a sample of archaeological fish bones excavated in the Old Town of Helsinki in 1993. The sample derives from the remains of a cellar in a house, used in late-sixteenth or early-seventeenth century by a wealthy person, probably a merchant.     

Lambs to the Slaughter: A Zooarchaeological Investigation of Stone Circles in Mongolia

Stone circles are a common monumental feature of the Mongolian Bronze Age (c. 1500–800BC), frequently occurring in association with other monument types, especially khirigsuurs. Until now the content of the stone circles has not been identified, a fact which has hampered our understanding not only of khirigsuurs and their related cosmology but also of the contemporary economy, owing to a research paradigm that was monument‐focused until very recently. The identification of domestic bovids in these features thus has profound implications for our approach to studying the society of this period and region. These implications, including a well‐developed cosmology and economy which included the ritual sacrifice of at least three different kinds of livestock, are introduced here. Copyright © 2014 John Wiley & Sons, Ltd.     

Interpreting the immature chicken bones from the Romano-British ritual complex on West Hill,Uley

The prehistoric to post-Roman site of West Hill, Uley in southwestern Britain was excavated between 1976 and 1979, and yielded a quarter of a million animal bones. Part of the site was a ritual complex, and this in particular produced a considerable amount of domestic fowl. A major problem has been to evaluate the immature domestic fowl bones and determine whether all ages are represented. This presents problems because the varieties of fowl represented are unknown. Therefore, can the osteometric data be seen as homogeneous? In fact the distribution of adult measurements suggests that one variety was mainly represented, that a wide range of ages of fowl were sacrificed, and that the selection of birds was probably not entirely random. © 1997 John Wiley & Sons, Ltd.