ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00459.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

A Greek merchant ship carrying a cargo of millstones, amphorae and bronze vessels was wrecked at Sec, off Mallorca, Spain. in about 375‐350 BC. Geochemical provenancing of the millstones helps in reconstructing the route of the ship and complements evidence from the amphorae. Thirty‐eight lava hopper‐rubber millstones and one Pompeian‐style rotary mill from the ship were sampled for provenancing. The hopper‐rubbers are mainly of basalt from the island of Pantelleria off North Africa in the Sicilian channel, one is from Nisyros off the Anatolian coast, and the Pompeian mill is of ignimbrite from Mulargia in Sardinia. The hopper‐rubbers are the most westerly examples known in the Mediterranean. and the Nisyros mill represents the first proven instance of millstone transport between the east and the west Mediterranean. The occurrence of the Pompeian mill in a fourth‐ceniury BC context is evidence of the use of this type a century earlier than previously thought. The Nisyros mill was probably taken on board at the start of the ship's voyage in the eastern Mediterranean, the Pantellerian mills may have been collected partly as ballast at Pantelleria, and the Mulargia mill was probably picked u

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00460.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

A combination of micro‐analytical techniques including thin layer chromatography (TLC), gas chromatography (GC). and combined gas chromatography/mass spectrometry (GCIMS) have been employed to study the lipid compositions of samples of skin from seven Dutch bog bodies. TLC showed that, while phospholipids have been degraded, other acyl lipids, for example triacylglycerols and steryl esters, may remain intact. GC and GC/MS analyses, following treatment of the total lipid extracts with acidified methanol, showed the presence of abundant fatty carboxylic acids and sterols. Molecular analysis by GC/MS allowed distinctions to be drawn between components originating from the bog body and the surrounding peat. Additionally, substances derived from microbial alteration of endogenous skin lipids and from the lipids of the micro‐organisms themselves can be distinguis

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00461.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

A non‐destructive bulk analytical method based on instrumental neutron activation techniques was developed to study Islamic glass weights and stamps. Three different successive irradiations are necessary. A calibration method and a calculation program have been developed in order to correct both the different observed interferences and geometrical factors. A good relationship was formed between the chronological classification of the objects and the compositional group

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00462.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Forty‐five sherds of Roman pottery, 21 terrae sigillutae and 24 common wares excavated in Augusta Praeroria, were analysed for 12 elements by atomic absorption and emission spectroscopy. Hierarchical agglomerative cluster analysis, principal component analysis, and non‐linear mapping were performed on the analytical data in order to classify the objects in groups which could account for different provenances; soft independent modelling of class analogy (SIMCA) and K nearest neighbours (KNN) were used for solving doubtful assignments. The classification results indicate that local productions of terra sigillatu can be easily distinguished from the imported ones, and that common wares have compositional patterns which differ from those of both local and imported terrae sigilla

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00463.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

When an archaeological site is investigated large numbers of potsherds may be recovered. These have to be drawn. This is a very time‐consuming and labour‐intensive task which is usually undertaken by skilled draughtsmen. The system described in this paper aims to speed the process of sketching potsherds by using software techniques developed for computer‐aided drawing (CAD), together with hardware which allows the user to digitize the profile of a sherd. The resulting system is cheap and portable, and may be used in the field in conjunction with a battery‐powered computer.A novel method of calculating the position of the original axis of a pot has also been developed for sherds lacking a section o f rim

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00464.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

This paper presents the results of electron microprobe analysis of two gold studs, and their associated gold alloy solders. from La Tolita in Ecuador. Metallographic and compositional data are presented and the types of solders used are discussed.

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00465.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Interaction of archaeological features with the secular variation in surface heat flux generates an anomalous ground temperature distribution which can form the basis for a shallow geophysical prospecting tool. Earlier studies have concentrated on recording surface temperature disturbances via aerial thermography but these results can be biased towards minor variations in vegetation, albedo. and microclimate. A more promising approach is to record temperatures at a depth of 20cm using a simple probe. Anomalies at this depth arise from the interaction of objects with the annual heat‐flux cycle and other long‐term temperature variations. The amplitude, shape, and phase of anomalies have been modelled, together with the nature and magnitude of other, unwanted causes of ground temperature variation. Field equipment and data processing techniques for the direct‐contact approach to thermal prospection have undergone trails in the U.K. at Verulamium and Fountains

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00466.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

La plupart des échantillons de verres archéologiques ne sont pas datables par thermoluminescence. Une analyse des causes limitant l'extension de la datation par thermoluminescence aux verres anciens montre que celles‐ci sont directement issues de caracteristiques de l'etat vitreux. Toutefois. dans certains cas particuliers, la datation est possible.Most archaeological glass samples cannot be dated using thermoluminescence (TL). An analysis of the causes which limit the extension of the TL dating method to ancient glass shows that these causes come from the vitreous state characteristics. Nevertheless in some cases, dating is still possi

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00467.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The eleLenth list of dates from the Oxford Radiocarbon Accelerator.

ISSN:0003-813X    

DOI:10.1111/j.1475-4754.1990.tb00468.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY