A MAGNETIC SURVEY OVER LA MAJA,AN ARCHAEOLOGICAL SITE IN NORTHERN SPAIN

A Roman archaeological site in northern Spain (La Maja, province of La Rioja) includes pottery workshops, part of an important ceramic industry that developed from about the first century BC to the first century AD. A geophysical study was planned to determine the extent of the industrial complex in the vicinity of an excavated kiln. Magnetic observations were done on a grid of 30 × 36m, with a sampling interval of 1m. Two dipolar-shaped anomalies were found: one in the north-east and the other in the south-west of the area. Low-pass and band-pass filters were used in the Fourier domain to enhance the characteristics of the magnetic data and to remove noise and undesirable shallow features. Three-dimensional polygonal prisms were used to model the magnetic anomalies based on palaeomagnetic measurements performed over an uncovered kiln that helped to constrain the induced and remanent parameters of the magnetizing fields.     

THE BAYESIAN APPROACH TO THE INTERPRETATION OF ARCHAEOLOGICAL DATA

Archaeologists are increasingly becoming aware of an approach to data investigation known as Bayesian statistics. In this paper we outline both the philosophical and statistical background to the approach. We show that it provides a logical and coherent framework in which to make inferences on the basis of both data and a priori expert knowledge. We note that adoption of the Bayesian framework is particularly timely since there have been recent dramatic developments in numerical methods which mean that a number of previous implementation problems have now been solved. As a result, many questions of archaeological interest, which require the use of complex statistical models, are being investigated using this methodology. We use a variety of recently published examples from a range of archaeological areas to illustrate the type of questions that can be answered and the nature of the methodologies used, and we make comparisons with the results obtained using more traditional statistical techniques.     

A GROUND RADAR SURVEY OF MEDIEVAL KILN SITES IN SUZU CITY,WESTERN JAPAN*

A ground-penetrating radar study of medieval kiln sites located near Suzu city, on the Noto peninsula, was conducted prior to excavation. Archaeological site plans estimated from time slices of the closely-spaced parallel radar profiles are compared with excavations and a proton magnetometer survey. The results indicate that non-destructive remote sensing with radar can help to determine effectively the presence and general structural features of intact kiln floors.     

COMPLETION OF THE SEISMIC REFRACTION SURVEY TO LOCATE THE VALLUM AT VINDOBALA,HADRIAN'S WALL*

The vallum is a major earthwork along the south side of Hadrian's Wall. All surface traces of it have been obliterated over a 500-m-long stretch past the fort of Vindobala at Rudchester, Northumberland. To the west of the fort, the vallum's course had previously been delineated by running shear-wave seismic refraction lines to obtain depth profiles of rockhead. We have now run more seismic refraction lines, using both shear waves and compressional waves, to the south-west and south of the fort, and thereby located the complete course of the vallum at Vindobala. The seismic refraction technique is successful at this site because the glacial drift cover is thin, so the vallum ditch was cut down into bedrock. During the second phase of seismic work, compressional waves gave better results than shear waves. Previously, test profiles using compressional waves had failed to locate the vallum ditch west of the fort where the surface elevation is lower; we now interpret that failure as being due to a shallow water table within the drift, which would have eliminated the compressional-wave velocity anomaly. Although the vallum does not pre-date the fort at Vindobala, its asymmetrical course around the fort suggests that it may already have been under construction to the west when the decision to build the fort was taken.     

Long-Term Occupation and Seasonal Settlement of Eastern Eurasian Pastoralists at Begash,Kazakhstan

Abstract

Recent excavations of the prehistoric pastoralist settlement of Begash, located in the Semirech'ye region of eastern Kazakhstan, provide evidence of one of the earliest pastoralist settlements in the eastern Eurasian steppe region. The archaeological complex at Begash includes a multi-period cemetery and rock art in addition to the settlement—a site complex that is well distributed throughout the koksu River Valley. Excavations at Begash have revealed three major phases of architectural development and six phases of material transition and site use, dated by a series of 34 calibrated radiocarbon AMS dates. These data demonstrate that mobile pastoral populations were active in the Dzhungar Mountains and koksu River Valley (Semirech'ye) as early as 2460 CAL B.C., more than 800 years earlier than previous theories suggested. Pastoralist activity at this domestic locale spans nearly 4000 years, with no archaeological evidence for long-term abandonment of the site in prehistory. Rather the occupational phases of the site are only interrupted by short-lived periods of disuse followed by centuries of re-engagement by local pastoralist communities. Thus, the broadly continuous record of material culture, domesticated faunal remains, and settlement at Begash index a local evolution of herding economies in Semirech'ye throughout the Bronze Age, beginning in the middle part of the 3rd millennium B.C. Ultimately, the data from Begash contribute a new perspective on the dynamic nature of Eurasian mobile pastoralists while also illustrating broad continuity in the settlement ecology of local populations that had a key role in the regional transmission of numerous innovations throughout the Bronze Age and later.     

Early Copper Age Settlements in the Körös Region of the Great Hungarian Plain

Abstract

This article discusses research carried out by the Körös Regional Archaeological Project from 2000 to 2006 at Early Copper Age Tiszapolgár Culture sites on the Great Hungarian Plain. To build a model of social organization for the period, we incorporated information from regional geomorphological studies, soil chemistry analysis, archaeological surface surveys, remote sensing, and systematic excavations at Early Copper Age sites in the Körös Valley of southeastern Hungary. Previous models characterized the transition from the Neolithic period to the Copper Age as an abrupt shift from a tell-based, sedentary, agricultural lifeway to one based on mobile cattle herding. By studying the transition between these periods on multiple geographic and temporal scales, we have identified a more gradual process with widespread regional variation in cultural patterns. Similar social processes characterize the transition between chronological periods and cultural phases in other parts of the world, and we suggest that a multiscalar approach is effective for building comparative archaeological models of long-term social change.     

IDENTIFICATION OF STONE BLOCKS USED FOR THE BUILDING OF THE THYSDRUS AND THAPSUS AMPHITHEATRES IN TUNISIA

In Tunisia, the largest amphitheatre (known as the Coliseum) at Thysdrus (El Djem), with some parts of the second amphitheatre, and the Thapsus amphitheatre have been built with squared stone blocks (opus quadratum). The petrographic and geotechnical analyses of the samples taken from the amphitheatre blocks show that these blocks belong to the Tyrrhenian and to the Mio‐Pliocene age. Ancient quarries have been found on the Tyrrhenian dune line between Hiboun and Al Alya, at a distance of 30 km from Thysdrus, from which the Tyrrhenian blocks have been extracted. Concerning the Mio‐Pliocene blocks, they have most likely been cut from just one ancient quarry found in the hill of Ksour Essaf. The height of almost all of the measured blocks from the Thysdrus Coliseum is equal to the Punic cubit used at Carthage (50 cm), and the height of the measured blocks from the Thapsus amphitheatre is also equal to the Punic cubit (50 cm), or very close to the Roman cubit (45 cm).     

Survey of the Outline of an Early Roman Marching-camp in Germany by Rammner's Current Line Pertubation Method

The outline of the first discovered early Roman Marching-camp north of the Limes in Germany (Dorlar, State of Hessen) was determined by electrical resistivity sounding. The camp was inhabited sometime between 11 and 15 and used as base to conquer Dünsberg, a keltic-germanic oppidum. Rammner's Current Line Pertubation Method (CLP) detected soil disturbances caused by ancient Roman construction. The CLP-Method was used to measure the perturbation of a current due to inhomogeneities in the ground. Data processing made it possible to determine the outline of the Roman marching-camp with an accuracy of ±0·15 m. The electrical soundings were confirmed by selected excavations.     

AN APPRAISAL OF THE PROBLEMS INVOLVED IN THREE-DIMENSIONAL GROUND PENETRATING RADAR IMAGING OF ARCHAEOLOGICAL FEATURES

There are a number of problems that are due to the physics involved in the ground penetrating radar (GPR) technique which result in the recorded data giving a distorted representation of the true subsurface structure. Many of these problems are reduced by the experience of the person interpreting the data. This paper is an attempt to remove some of the subjectivity from this process by considering how the distortion in the data could be reduced by applying a migration routine. The amount of data, and the time needed to collect it, place a restriction on the use of the migration process to two dimensions only and result in a compromise approach to the use of GPR. This compromise may, however, result in better integration of GPR with the other geophysical techniques available.     

GEOPHYSICAL SURVEY AT BODEN VEAN,CORNWALL, INCLUDING AN ASSESSMENT OF THE MICROGRAVITY TECHNIQUE FOR THE LOCATION OF SUSPECTED ARCHAEOLOGICAL VOID FEATURES*

A geophysical survey was conducted at Boden Vean, St. Anthony Meneage, Cornwall, over the site of a buried chamber thought to be the remains of a souterrain or fogou. A combination of geophysical techniques was successfully applied including an experimental microgravity survey over the location of the buried chamber itself. Magnetometer survey revealed a complex palimpsest of archaeological activity extending throughout the surrounding landscape, centred on a rectangular ditched enclosure containing the fogou. A series of gravity anomalies were recorded in the vicinity of the latter which were consistent with the collapsed section of the feature recorded by the Cornish Archaeological Unit. Further gravity anomalies suggested the presence of additional void features, possibly related to the extended passages of the fogou.