IDENTIFICATION OF FORGERIES BY MEASURING TIN ISOTOPES IN CORRODED BRONZE OBJECTS*

The reliable identification of fakes consisting of bronze often presents problems, because traditional methods such as stylistic studies, optical microscopy, chemical analysis or X‐ray diffraction of the corrosion may not be conclusive. We present a method that is based on the comparison of the tin isotope ratios ¹²²Sn/¹¹⁶Sn and ¹¹⁷Sn/¹¹⁹Sn in the metal and in the adherent corrosion layer. An artificial patina is usually generated within a short time period. It has been observed that such a procedure leads to a depletion of the light tin isotopes in the corrosion layer, while in naturally corroded authentic archaeological objects no isotopic fractionation has been detected. The method has also been applied to archaeological objects and it could be confirmed, among other examples, that the famous ‘Sky Disc of Nebra’ is authentic.     

Ancient agriculture and domestic activities: a contextual approach studying silica phytoliths and other microfossils in soils

Abstract

Based on microfossil and soil data, we discuss a different methodological approach to agricultural and domestic archaeological studies, taking two Formative sites in the north-west Argentinian high valleys (province of Catamarca) as case studies, independently of traditional datasets and historical analogies. As a result of our investigations we not only recognised the vegetal species cultivated in ancient fields (dated to c. AD 800) but also distinguished some of the agricultural practices, such as crop rotation and alternation, use of animal fertilisers and irrigation resources, as well as the abandonment of the site. From this perspective, corral episodes could also be distinguished. In residential enclosures, we obtained results concerning activity areas, the definition of floors and the identification of reoccupations.     

SEX IDENTIFICATION OF SLAVE SACRIFICE VICTIMS FROM QIN STATE TOMBS IN THE SPRING AND AUTUMN PERIOD OF CHINA USING ANCIENT DNA

Ancient DNA (aDNA) analysis was employed to determine the sex of slave sacrifice victims from Qin State tombs during the Spring and Autumn Period of China. It is difficult to obtain sex information from fragmentary skeleton samples with the aid of skeletal morphology methods. aDNA was extracted from the dentine in selected tooth samples of sacrificial slaves using a modified traditional method, which combines together phenol/chloroform extraction, silicon dioxide adsorption and ultrafiltration concentration. Based on the sequence differences between the amelogenin homologous gene in the X and that in the Y chromosome, a pair of specific primers was designed to identify the sex of the selected samples. In the selected eight typical samples, the aDNA analytical results revealed that three were males and two were females. These findings indicate that molecular sex identification might provide more valuable information for archaeological research on the institution of slave sacrifice in the Spring and Autumn Period of China.     

A Novel Application of Molecular Techniques to Pacific Archaeofish Remains*

Until recently, the identification of fish bone from Pacific archaeological sites generally relied upon morphological analysis of a relatively restricted number of skeletal elements. Limited morphological variation within fish families, amongst other things, has often restricted Pacific archaeofish determinations to the level of family or, in some cases, genus. We suggest that these relatively imprecise determinations may mask important aspects of prehistoric human fishing practices and subsistence patterns. This paper describes a molecular technique that allows for more precise taxonomic determinations, initially applied to the large and diverse family of Serranidae. The technique involves extraction, amplification, sequencing and analysis of mitochondrial DNA variation in the 16s ribosomal RNA gene. Following development of protocols and primers for modern reference materials, the technique was applied to an archaeological faunal assemblage from Aitutaki, southern Cook Islands.     

MORTAR STUDIES TOWARDS THE REPLICATION OF ROMAN CONCRETE

The use of strong and durable materials is one essential ingredient leading to the survival of many monumental Roman concrete structures. Replicated concrete mortars with different lime to pozzolan ratios, encompassing the range likely to have been used by the Romans, have been studied here to determine their relative compressive strengths as a function of time. This has been supplemented by the use of the scanning electron microscope to delve into the structure and composition of the binders formed within the strongest and weakest mortars, leading to a deeper understanding of the reasons for the differences in compressive strength.     

Post‐Depositional Elemental Alterations in Pottery: Neutron Activation Analyses of Surface and Core Samples*

From 38 sherds with ‘corroded’ surfaces, two samples per sherd were examined using Neutron Activation Analysis, one from the surface and one from the core of each sherd, in order to analyse post‐depositional alterations of minor and trace elements. The most striking effect was that a leaching of Ca could be found at the surface. Another group of elements that is severely affected are the alkali metals, with Cs and Rb showing the strongest changes. A third conspicuous group of elements are the Rare Earth Elements. Finally, the effect of such alterations on a statistical data evaluation to classify pottery according to provenance is investigated.     

ANCIENT OMPHALOS AT DELPHI: GEOMETRICALLY A SPACE‐INVERTING ANAMORPHOSCOPE

Whether the artisan who made the Omphalos at Delphi over 2500 years ago recognized the optical transform properties of its shape or not, its geometrical features are nevertheless those of a space‐inverting anamorphoscopic mirror. Specifically, it is similar in shape to a circle‐inverting anamorphoscope. We speculate that select members of the ancient religious sect at the Temple of Apollo at Delphi realized the symbolism of inverting all of space outside the Omphalos into the image field inside its base, thus making it the virtual centre of the World.     

BUILDING MATERIALS OF THE THEATRE OF MARCELLUS,ROME*

The building materials of the Theatre of Marcellus, 44–11 bce , reflect Roman builders' careful selections of tuff and travertine for dimension stone and volcanic aggregates for pozzolanic concretes. The vitric–lithic–crystal Tufo Lionato tuff dimension stone contains a high proportion of lava lithic fragments, which increase its compressive strength and decrease water sorption, enhancing durability. Sophisticated installations of travertine dimension stone reinforce the tuff masonry, which is integrated with durable concrete walls and barrel vaults. The pozzolanic mortars of the concretes contain harenae fossiciae mainly from the intermediate alteration facies of the mid‐Pleistocene, scoriaceous Pozzolane Rosse pyroclastic flow. They have pervasive interpenetrating pozzolanic cements, including strätlingite, similar to high‐quality, imperial era mortars. Concrete walls are faced with refined Tufo Lionato opus reticulatum and tufelli, and opus testaceum of fired, greyish‐yellow brick. The exploratory concrete masonry, which includes some of the earliest examples of brick facings and strätlingite cements in Rome, and the integration of these materials in complex architectural elements and internal spaces, reflect the highly skilled workmanship, rigorous work‐site management and technical supervision of Roman builders trained in republican era methods and materials.     

TRUTH IN THE BONES: RESOLVING THE IDENTITY OF THE FOUNDING ELITE THOROUGHBRED RACEHORSES

Our multidisciplinary study of historic Thoroughbred horses solves two long‐running mysteries in racing history. Eclipse, the greatest racehorse ever known, never lost a race. His skeleton is housed in the Royal Veterinary College, London; however, there is controversy over its authenticity. The 1880 Epsom Derby was won by Bend Or. In one of the great controversies of Thoroughbred racing, the owners of Bend Or were accused of swapping him with another horse, Tadcaster, whose maternal pedigree was more prestigious. Bend Or's skeleton resides at the Natural History Museum, in London. Eclipse and Tadcaster were both extremely popular at stud, and the vast majority of racehorses today are descendents. We compared mitochondrial DNA haplotypes of living and historic Thoroughbred skeletons, including those of Eclipse and Bend Or. Additionally, we compared skeletal morphometrics of Eclipse's skeleton with measurements taken at autopsy. Carbon and nitrogen stable isotopes of a range of skeletal elements were compared in order to establish that the Eclipse skeleton was that of a single horse. Our multidisciplinary data suggest that the putative skeleton is consistent with that of Eclipse. In contrast, mitochondrial DNA haplotype sharing indicated that the skeleton known as Bend Or is most probably that of Tadcaster.     

Plant macroremains from the Roman harbour of Pisa (Italy)

Abstract

Results relating to the identification of macroscopic plant remains (leaves, fruits, seeds) discovered during the archaeological excavation of the Roman harbour of Pisa, in Tuscany, Italy are reported. The plant samples include the cultivated species Prunus spp., Corylus, Olea, Vicia, Juglans and the nemoral wild species Salix spp., Quercus spp., Fagus, Ulmus, Alnus. The remains of cultivated plants — fragments of fruits and seeds — were perhaps part of the boats' cargo or stores for the crew's meals. In the case of the wild taxa, the simultaneous presence of fruit and leaves, suggests that the remains recovered came from the forest vegetation bordering the area of excavation and the adjacent higher grounds, thus delineating a new vegetation landscape for the ager pisanus.