Archaeometric Clearinghouse

Abstract

The “Archaeometric Clearinghouse” aims to promote collaboration between field archaeologists and archaeometrists by disseminating information. It is not a book review column. The following notices of three symposium publications and two dedicatory volumes are therefore intended to be informative rather than critical. They call attention to the existence of books that are likely to be of interest to both archaeologists and archaeometrists, and they give a brief indication of the nature and scope of the contents.     

Archaeometric Clearinghouse

Abstract

The “Clearinghouse” continues to evolve in ways designed to enhance its original and continuing purpose: to build bridges between archaeology and archaeometry. An earlier instalment contained a state-of-the-art report on “Direct Detection in Radiocarbon Dating” by E. B. Banning and L. A. Pavlish (JFA 5 [1978] 480–483). This is the first time the column carries an account of original research. Such reports are ordinarily found in the main sections of the Journal, but the paper below presents a methodologically novel approach that promises to further the use of archaeometric analysis of large assemblies of archaeological finds.

One of the limits of sophisticated (read expensive and time-consuming) methods of physical or chemical analysis is that they cannot be routinely applied to tens of thousands of objects, and that a mere handful of analyses out of such large bodies of artifacts may not be representative of the whole. The approach used by Ms. Minzoni-Deroche bridges this gap and should encourage field archaeologists and archaeometrists to join forces in tackling large assemblies of finds that have not seemed to be attractive targets before.     

Archaeometric Clearinghouse

Abstract

In the course of compiling a list of taxonomic experts with interests in, and expertise relevant to, archaeology, a number of professional societies and other organizations have been found whose members have these qualifications. One of them, the International Council of Archaeo-Zoologists (I.C.A.Z.) was described in JFA 5 (1978) 361-70, and since all members of I.C.A.Z. are, by definition, concerned with archaeology, the entire membership list was reprinted by permission.

The following sections deal with several groups whose central purpose is not archaeometric, but among whose members are many who have knowledge pertinent to archaeology and who may be interested in scientific-archaeological collaboration.     

Archaeometric Clearinghouse XX

Abstract

This article is a review of three recent monographs concerned with the later Middle Cypriote and Late Cypriote periods on Cyprus (ca. 1700–1200 B.C.). Each study focuses narrowly on archaeological, philological, or historical problems associated specifically with Cyprus or more generally with interrelations among Aegean, Cypriote, and eastern Mediterranean cultures. Oblivious to common interests, the authors reflect their own particularistic concerns: philology, toponymy, stone anchors. The three publications reviewed serve both as a framework and as a vehicle for presentation of a balanced discussion of archaeological, historical, and theoretical problems associated with Middle/Late Bronze Age Cyprus and its role in eastern Mediterranean maritime trade. In conclusion, and as an alternative, a concise synthesis of cultural and socio-historical patterns on Cyprus ca. 1700–1200 B.C. is presented.

The three volumes under review are: L. Hellbing, Alasia Problems. StudMedArch 57 (P. Åström's Förlag: Göteborg 1979); D. E. McCaslin, Stone Anchors in Antiquity: Coastal Settlements and Maritime Trade Routes in the Eastern Mediterranean. StudMedArch 61 (P. Åström's Förlag: Göteborg 1980); J. Strange, Caphtor/Keftiu, A New Investigation. Acta Theologica Danica 14 (E. J. Brill: Leiden 1980).     

Archaeometric Clearinghouse XVII

Abstract

Rapid escalation of fieldwork costs during the past years has required archaeologists to pursue innovative methods for maximizing the amount of fieldwork for the funds available. One of the more labor intensive aspects of fieldwork is the recovery of cultural materials through the use of manual shaker screens. During the past several years, several archaeologists in the midwestern United States have utilized slightly modified, commercially-manufactured agricultural machines for this task. The result is a very cost-efficient method of artifact recovery which drastically reduces the amount of time spent at this task, allowing excavators to spend much more of their field time in excavation and data recording. It has also proved to be very nondestructive to artifacts passing through the machine. Instructions for modifying and using the machine are presented.     

Archaeometric Investigation of Medieval Pottery from Excavations at Novo Brdo,Serbia

Medieval pottery from excavations at Novo Brdo, Serbia, an important mining and trading centre during the 14th and 15th centuries, was investigated by a combination of optical microscopy, inductively coupled plasma – optical emission spectrometry, Fourier transform infrared, micro‐Raman and energy‐dispersive X‐ray fluorescence spectroscopy and X‐ray powder diffraction methods in order to determine its composition and firing temperature. The samples investigated were made of medium‐ to coarse‐grained, non‐calcareous clay, by a relatively well‐controlled firing procedure in an oxidizing atmosphere. The firing temperature was estimated to be 850–950°C. The similarity between the chemical composition of the investigated pottery and the local raw clay, combined with the outward appearance and the archaeological findings, indicate domestic production. The pottery is covered with the transparent lead‐rich glaze. Iron and copper were used as colourants.     

The Improved Lns Pixe‐Alpha Portable System: Archaeometric Applications*

The possibilities presented by the improved portable PIXE system are discussed. Examples are given of applications in the cultural heritage field, and in particular in the characterization of pigments and silver patina on ancient Roman coins. The limitations of the system are also discussed.     

Archaeometric study of medieval pottery excavated at Stari (Old) Ras,Serbia

A combined study of a series of polychromatic and monochromatic glazed medieval pottery shards excavated from the archaeological area of Stari (Old) Ras in southern Serbia, including petrographic and chemical analysis, powder X-ray diffraction (PXRD) and Fourier transform infrared (FTIR) spectroscopy, allowed us to clearly distinguish between two groups of ceramics. Ras pottery, made of fine-grained well-cleaned clay and characterised by a rich mineral assemblage, was produced by firing in a temperature range between 800 and 900 °C. Reljina Gradina ceramics were produced at similar temperatures from materials which, with regard to mineralogical and chemical composition, show clear similarity with local clay, suggesting that these samples are of local origin and production. This work is the first systematic archaeometric study of medieval pottery excavated on the territory of Serbia.     

Formation of Fluid Inclusions during Heat Treatment of Barremo‐Bedoulian Flint: Archaeometric Implications

At the end of the fifth millennium bc , the development of a specialized lithic industry in the Chassey societies of south‐eastern France and its dissemination as far as Catalonia and Tuscany attest to important socio‐economic changes in the Mediterranean Neolithic societies. The lithic production was made on barremo‐bedoulian flint that was heat‐treated to improve the sharpness of the tools produced. Microscopic observations of archaeological and geological, heated and unheated barremo‐bedoulian flint samples allowed us to highlight the heat‐induced formation of fluid inclusions. Microthermometry analyses showed that these inclusions contain pure H₂O, most probably resulting from the dehydration of length‐slow (LS) chalcedony and the closure of narrow pores, according to the model proposed by Schmidt et al. ( 2012 ). Our results enable us to estimate the heating temperatures used by Chassey artisans to ≈ 230°C. We also propose the ‘pressure cooker’ model to explain the migration of liquid water in flint nodules heated to 230°C. Then, we discuss the ability of a particular type of flint to be heat‐treated, and hence its value for Neolithic society, which depends on: (1) the amount of LS chalcedony that ensures the water release at relatively low temperature; and (2) on the total volume of porosity available to store the dehydration water.     

Archaeometric investigation of pottery from funerary gifts in Kal-e Chendar,Shami (Khuzestan,Iran)

Thirty fragments of red slip, glazed, common and cooking ware from Hellenistic and Parthian tombs at Kal-e Chendar in Shami (Iran) were investigated. Petrographic assemblage and chemometric evaluation of chemical data collected most samples in a large cluster, suggesting a common provenance, even in a quite wide area which includes Izeh plain and lowland Susiana, and underlining the presence of smaller very distinguished groupings. Surface finishing layers (both glazes and red slips) showed a high degree of alteration of their morphological features. Blue glazes are typical plant-ash, with copper as a colouring agent.     

Roman Millstones from Orvieto (Italy): Petrographic and Geochemical Data for A New Archaeometric Contribution

The probable site of extraction and production of Pompeian‐style leucite‐bearing millstones, singled out by Peacock (1980, 1986) in the vicinity of Orvieto, and the outcropping of the ‘Leucitophyre’ lava have been systematically studied employing standard petrographic and geochemical methods (optical microscopy and ICP–AES/MS spectrometry). The combination of petrochemical data, previously very poor, allowed us definitively to exclude the possible ‘overlap’ of phonolitic and tephri‐phonolitic lavas from other Quaternary Volcanic Districts of Latium, and provides a helpful tool for future work on leucitite millstones. Consequently, the databank obtained has been used to attribute the origin of five Roman millstones discovered in three archaeological sites in central Italy (Latium and Marche). It has also been useful to verify the geological provenance of some Sicilian and French leucitite millstones analysed by previous workers. The results point to a provenance from the Orvieto area, with the exception of the millstones from Sicily, for which a different origin was hypothesized.