THE MATERIALS OF HOYSALA TEMPLES AND SCULPTURES: A PETROGRAPHIC CHARACTERIZATION

Talcxhlorite schist is the material commonly used by the sculptors and builders of the Hoysala dynasty, which ruled i n the western part of India south of the Deccan from the eleventh to the mid-fourteenth century. Forty-one samples from seven Hoysala sites were examined by petrographic microscopy and electron beam microprobe analysis. Although it is difficult to distinguish between some of the rocks from the different sites. many contain minerals that can be valuable in distinguishing between different possible quarry sources.     

THE APPLICATION OF INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS TO A STUDY OF PREHISTORIC STEATITE ARTIFACTS AND SOURCE MATERIALS

A study of the trace and minor element content of steatite artifacts from the Eastern United States has been carried out. Samples from both quarry and habitation sites ranging from New York to North Carolina have been analyzed through the use of instrumental neutron activation analysis. The most successful method of evaluating data has involved the study of a very coherent group of elements known as the Rare Earths. Geological processes cause fractionation of this group and it is this fractionation which is of use in terms of characterizing the source deposits of this material. Promising but less definitive results have been obtained with the elements scandium, chromium, cobalt and others. Sufficient variations have been found to be present in the source deposits of steatite in this area to enable differentiation, and the successful linking of samples from habitation sites to their quarry deposits has been achieved in some cases. This paper discusses the results of this study to date, the methods employed, and the potential value of this work in helping to reconstruct prehistoric trading systems.     

Nature and source of the gandhara sculptural schist

No definite source localities have been identified for the stones used by the Gandharan sculptors, but it is considered that the predominant rock was an alumina-rich chloritoid-paragonite-muscovite-quartz schist, probably from Swat. A chemical analysis of this rock is presented.     

A survey of British metamorphic hone stones of the 9th to 15th centuries AD in the light of potassium-argon and natural remanent magnetization studies

Hone stone trade and use during the period of Scandinavian-English interaction (9th–15th centuries AD) was dominated by two metamorphic petrological types represented by the “Norwegian Ragstone” (NR) a quartz-mica schist, and the “Purple Phyllite” (PP) a quartz-mica phyllite, and finds are abundant throughout the Viking world. Petrology associates the NR type with the known quarries at Eidsborg, southern Norway, and this has been endorsed by isotopic evidence. The source of the PP type remains unknown, but has been postulated to be a second facies of Eidsberg material, or even a Variscan phyllite from Belgium. It was the purpose of this study to further refine the possible source area of the PP material. Age data now indicate a “Caledonian” source for the PP type. Within Europe the superposition of metamorphic belts has led to the occurrence of both schist and phyllitic metamorphic lithologies. Petrological criteria therefore rarely provide evidence of the source of such rocks. The zonation of Europe by metamorphic belts does, however, allow isotopic age studies to be used as an aid to provenancing. The PP hones exhibit a range of mineralogy which may indicate a variety of sources, although no archaeological sites capable of producing such a quantity of material have been identified within the Viking world. The evidence, however, indicates a source in the Norwegian Caledonides.     

Ancient ‘Black’ Decorative Stones and the Ephesian Origin of Sculptural bigio antico

Isotopic, EPR and petrographic studies aimed at establishing the provenance of sculptural bigio antico are reported, including 18 possible quarry sites and 21 ancient sculptures. The results demonstrate that the Belevi quarry, north‐east of Ephesos, above the more famous white marble quarry, was the major source of this marble. Nineteen artefacts belong to Belevi, whereas the precise origin of the remaining two is unknown, but must probably be found within the same area. The peculiar distribution of δ¹³C values both for Belevi and artefacts was crucial for inferring the correct provenance, subsequently confirmed by additional analytical and petrographic data.     

MAGNETIC SUSCEPTIBILITY VARIATIONS AT MONS CLAUDIANUS AND IN ROMAN COLUMNS: A METHOD OF PROVENANCING TO WITHIN A SINGLE QUARRY

Mons Claudianus in the Eastern Desert of Egypt was an important source of granodiorite for Roman columns. Computer contouring of 1119 magnetic susceptibility measurements at the quarry shows systematic variations, with low readings in the west of the quarry area and higher readings in the east. One hundred and seventy measurements on 62 columns of Mons Claudianus type in Rome and its environs were compared with the quarry readings, using a t-test based procedure. Some columns with distinctively low or high magnetic susceptibility could be provenanced very precisely to areas of about 700 × 700m within the 9km² of Mons Claudianus. Columns with susceptibility in the middle of the Mons Claudianus range could not be provenanced precisely. Results indicate early (first century AD) use of both west and east parts of Mons Claudianus, and contemporaneous use of several parts of the quarry, rather than systematic or sequential opening of the area. Columns found in third-century AD monuments, provenanced to the same parts of Mons Claudianus as earlier material, may indicate reuse of columns in some monuments. Magnetic susceptibility constitutes a portable and non-destructive method capable of provenancing not only to a quarry, but to specific areas within a single quarry.     

Potassium-argon ages of schist honestones from the viking age sites at Kaupang (Norway), Aggersborg (Denmark), Hedeby (West Germany) and Wolin (Poland), and their archaeological implications

Viking age honestones from four large sites in northern Europe have been made from two different types of quartz-muscovite schist: one dark grey, very fine-grained schist, and a light grey, fine-grained schist. In order to determine the provenance of these schist hones, KAr ages have been determined on 16 selected representative hones. The dark grey schist hones yield Caledonian ages of 403–446 Ma. and consideration of petrographic evidence leads to the conclusion that the hones were quarried in the Caledonian area (presumably) of Western Norway. The light grey schist hones are Precambrian, with KAr ages of 931–946 Ma, and are presumed to originate from Telemark, South Norway. The amount and homogeneity of these honestone groups from different parts of the Viking world indicates the existence of large quarries, and demonstrates that production and trade were more wide-ranging than had hitherto been assumed.     

Obsidian hydration at high elevation: Archaic quarrying at the Chivay source,southern Peru

We examine obsidian hydration as a means to date archaeological sites at high elevation in the central Andes, and in particular quarry sites that are difficult to date by radiocarbon means. The Chivay obsidian source lies in a volcanic depression above the Colca Valley in Arequipa, Peru (71.5355° S, 15.6423° E) at 4950 masl. We compare obsidian hydration readings from one quarry and two workshop locations. Ninety-one flakes from the quarry pit, and 61 and 33 flakes from the workshops were analyzed for hydration bands. Of these, 68 from the quarry, and 54 and 33, respectively from the workshops produced at least one culturally meaningful hydration band. As expected, obsidian appears to hydrate slowly at this high elevation. Yet, variation in hydration readings is low within stratigraphic contexts, suggesting relatively narrow windows of knapping activities in each excavation level. A small number of radiocarbon dates allow us to develop a preliminary hydration rate for Chivay obsidian in this high elevation location. Hydration data indicate that intensive quarrying began by 3800 cal. BC and stopped ca. 2300 cal. BC. By contrast, the two workshops appear to have been deposited 2900 and 1200 cal. BC, and 2700 and 2400 cal. BC. The data are consistent with an uptick in obsidian use by at least the Terminal Archaic period.     

Medieval land remediation of a quarry site at Wallingford,Oxfordshire, revealed by microfossil analysis

Abstract

Backfill material from a 12th- to13th-century quarry, north of Wallingford, south Oxfordshire, comprises sandy loam overlain by Cretaceous (early Cenomanian; Mantelliceras mantelli Macrofaunal Biozone) Glauconitic Marl Member, of the West Melbury Marly Chalk Formation as identified by its abundant, biostratigraphically useful, foraminifera and ostracods. A local outcrop source of the Glauconitic Marl Member, less than 1 km north of the quarry pit, is the likely provenance of this material, and a contemporaneous road, which was discovered adjacent to the medieval quarry by magnetometer surveys and archaeological excavation, would have aided its transportation, into the town via the North Gate. We hypothesise that the use of a calcareous marl to overlay sandy loam deposits probably encouraged land restoration when the quarried area was returned to pastoral agriculture.     

Sampling for Provenance: Tailings from Prehistoric Stone Quarries in the South Pacific

Stone is a principal component in archaeological assemblages across the Pacific. It provided a major element in architecture, used as trade goods, and was fashioned into implements and ornaments, monolithic monuments, statues, money, and emblematic symbols of victory, status and ethnicity. In short, stone is a pervasive element in the economic, social, and political fabric of Pacific cultural traditions. However, provenance of rock quarries, the source of this raw material, has received limited attention in Oceania. Provenance studies have been sidestepped or short-changed in the rush to analyse artifactual materials. Here we establish a foundation for more robust provenance studies and field sampling strategies through a discussion of (1) quarry identification and (2) sampling within prospective sources. A model of quarry identification, sampling, and characterization is drawn from work on Rapa Nui (Easter Island), and the fundamental precepts are outlined for future sampling experiments and provenance work in stone quarries generally.     

Obsidians from the Melka-Konture prehistoric site,Ethiopia

Obsidian artifacts from the Melka-Konture site about 50 km south of Addis Ababa span the period from Oldowan to Late Stone age. A number of specimens from different levels have been examined petrographically and for their chemical compositions. All prove to be alkali rhyolite obsidians of virtually identical composition and petrographic character, differing only in degree of devitrification and hydration. They belong to Group 1g of Renfrew et al. (1966) and it is almost certain that their source is the nearby obsidian quarry at Baltchit. This seems to have been opened in a short flow which appears to be unrelated to the large extinct Recent volcano, Wachacha, which lies to the north-west.     

Representative archaeological finds of <Emphasis Type="Italic">pietra ollare</Emphasis> from Comacchio (Italy): identifying provenance and high-T mineral breakdown reactions hindering lithotype classification

Three different lithotype groups have been recognized in representative fragments of pietra ollare artefacts found in the mediaeval archaeological excavations of Comacchio (Italy). Petrographic, mineralogical and chemical compositions clearly show that Valchiavenna and Valmalenco, in the Central Alps, represent the provenance areas of two of the pietra ollare groups, i.e. grey carbonate talc schist (also known as soapstone) and green chlorite schist, respectively. The third representative pietra ollare group consists of whitish-yellowish rocks inferred to be Alpine talc schists that have suffered some artificial pyrometamorphic transformation hindering their classification in the framework of pietra ollare lithotype categories and source localities reported in literature. A distinguishing feature of these high temperature-fired (HT-fired) talc schist samples is the occurrence of talc and chlorite dehydroxylation and subsolidus reaction products, mainly protoenstatite/enstatite + forsterite, together with relatively low loss on ignition values. These talc schists might have been exposed to temperatures >900 °C (with the resulting talc dehydroxylation producing a void-rich texture), but never reaching 1200 °C, which is the sintering temperature for soapstones. The whitish-yellowish artefacts were definitely not used as containers for cooking food at temperatures below or around 500–600 °C (as instead shown by the preservation of the original physical features of the grey pietra ollare lithotypes), but in some kind of higher-T pyrotechnological processes.     

Winning back more than words? Power,discourse and quarrying on the Niagara Escarpment

This paper explores the controversy and public hearing on the proposed extension of the largest limestone quarry in Canada, operated by Dufferin Aggregates at Milton, Ontario. The quarry constitutes an important source of construction material for the nearby Greater Toronto Area. However, the quarry is protected by the provincial Niagara Escarpment Planning and Development Act and located inside the UNESCO-designated Niagara Escarpment Biosphere Reserve. The proposal has therefore attracted considerable opposition from the public institution charged with its protection, the Niagara Escarpment Commission, as well as environmental groups and local residents. To make sense of the tensions, conflicts and outcome of the Dufferin case, we consult and apply several critical literatures. We see the conflict as part of a transformation of the countryside from a space of production to a space of consumption, where there is a shift in emphasis from resource extractive to scenic and ecological landscape values, and the displacement of productive classes, farmers and workers, in favour of a service class of professionals and retirees. Within this transformation, we identify a 'power geometry' of actor networks of different coalition groups that form allegiances and engage in struggles at different geographic scales. These actor networks operate within the set frames of a dominant development discourse and a popular environmentalist discourse that both include and exclude other ways of seeing and managing the escarpment.     

Approaching the Hatch Jasper Quarry From a Technological Perspective: A Study of Prehistoric Stone Tool Production in Central Pennsylvania

Abstract

Mitigation of the Hatch jasper quarry, a “prospect site” in Central Pennsylvania, has enabled the reconstruction of a local system of stone tool acquisition and production. Artifacts from the quarry and the nearby Houserville habitation complex were analyzed using an attribute-based stage typology. This technological approach permitted the separation of geofacts from artifacts, and revealed evidence suggesting that Houserville knappers obtained tool stone from the quarry. Attention was also given to the study of how systematic heat treatment was used to enhance the flaking characteristics of the Hatch quarry jasper. This research highlights the benefits that a technological analysis of flake artifacts, in addition to finished tools, can provide for understanding stone tool production at quarry localities.     

BLACK AND RED GRANITES IN THE EGYPTIAN ANTIQUITY MUSEUM OF TURIN: A MINERO‐PETROGRAPHIC AND PROVENANCE STUDY

A recent project to investigate the stone artefacts preserved in the Egyptian Antiquity Museum of Turin has been undertaken, with the aim of supplying their systematic classification and suggesting the provenance site of the original raw materials. This paper focuses on seven sculptures dating back to the New Kingdom (18th–19th Dynasties): the statue of Ramses II, three of the 21 sculptures of the goddess Sekhmet, the statue of the goddess Hathor, the Ram‐headed Sphinx and the sarcophagus lid of Nefertari. Petrographic observations have shown that all the sculptures are made of granitoid rocks, with variable composition from granite to granodiorite and tonalite. The observation of strong macroscopic analogies with the so‐called black and red granites outcropping in the Aswan area has suggested a common origin of all the raw materials used for their manufacture. In order to verify this provenance hypothesis, several samples were collected in the Aswan quarry districts. According to results of a minero‐petrographic and geochemical comparison between the statues and the Aswan quarry samples, it was possible to identify the source area of the stone sculptures and finally to highlight the importance of an archaeometric approach to the solution of archaeological problems.     

Bulk element composition versus trace element composition in the reconstruction of an obsidian source system

It has become possible, through compositional analysis, to differentiate among discrete obsidian quarry and collecting localities within a single source area. The analytical potential of such information is considerable yet studies are seldom undertaken owing to the difficulties associated with trace element analysis.This study is intended to explore the feasibility of using bulk element data instead of trace element data in such compositional analyses. Techniques of bulk element analysis are far more accessible to archaeologists. The results of an experiment utilizing carefully controlled samples from the El Chayal obsidian source, Guatemala, are reported and discussed.     

Multi-Isotope Investigations for Scientific Characterisation and Provenance Implication of Banded Travertines from Tripolis Antique City (Denizli–Turkey)

The coloured stones used in buildings and monuments were an indicator of power and wealth during the ancient times. In this study, Tripolis city samples have been compared with Tripolis quarry samples in order to recognise the provenance of the banded travertine blocks in the ancient city. The banded travertine samples have similar mineral compositions and mainly consist of calcite with minor amounts of dolomite, aragonite, clay and iron oxide minerals. These results are also supported by CRS studies. Calcite is in the form of needle-shaped crystals ranging between 0.163–1.418?mm (in city) and 0.303–1.270?mm (in quarry). Tripolis banded travertine samples show the similar compositional spread in terms of major oxide, trace elements. δ¹³C_V-PDB values of banded travertines range from 1.93 to 5.25‰ (in city) and 2.99 to 3.99‰ (in quarry), δ¹⁸O_V-PDB values change between (?16.93)–(?10.08) ‰ and (?15.93)–(?13.01)‰, respectively. The U–Th radiometric ages are determined between ～267 and 9?ka in Tripolis city samples and ～350 and 2?ka in Tripolis quarry samples. The minero-petrographic, geochemical, C–O and U–Th isotope results fairly matched with each other. It seems highly probable that the banded travertines in Tripolis city were extracted from the Tripolis quarry, which is located at the northeast of the antique city with a distance of 3?km.     

Quarrying and Production of Milling,Implements at Antelope Hill,Arizona

Abstract

To process mesquite, maize, and other substances, aboriginal groups living in the Lower Colorado-Lower Gila rivers region of SW North America used characteristic milling equipment: squared, flat-faced, convex-based metates (lower grindstones) with elongated manos (upper grindstones) and large wooden mortars with long, cylindrical stone pestles. Andesite and sandstone bedrock outcrops where stone was quarried and milling implements produced have been located. The archaeological deposits at the quarries have not been masked by the debris of later quarrying for rotary mills or building blocks, and thus the quarry sites offer an opportunity to study the production of ancient forms of milling implements, and provide insights into the organization of an ancient stone technology. Antelope Hill, a large arkosic sandstone quarry on the Lower Gila River in Arizona is presented as an example of a widespread phenomenon in the region. Analysis of quarry debris in the field and laboratory, experimental replication, and ethnographic and historical data, combined, have resulted in an understanding of this aspect of aboriginal technology.     

New data of 87Sr/86Sr ratio in classical marble: an initial database for marble provenance determination

⁸⁷Sr/⁸⁶Sr ratios are presented for white marbles collected from some of the most famous classical quarry areas of the Mediterranean: Carrara, Paros, Naxos, Pentelikon, Dokimeion, Hymettus, Thasos, and Proconnesus. These ratios range from 0.7071 to 0.7092. The ranges of the different quarry areas are notably superimposed; this prevents a common adoption of this parameter in distinguishing the quarry locations for the classification of the provenance of marbles used during classical times for architectural and sculptural artefacts. However some quarry areas show peculiar distributions of their isotopic values, which could help to assign the provenance to an unknown marble artefact.Adding these new data to the scarce number of strontium isotopic compositions measured on white marbles and available in the relevant literature, permits the creation of an initial database of 11 classical quarry locations. This database confirms that the strontium isotope ratio could be used in marble provenance determination, together with petrographic and geochemical methods, as an ancillary technique.     

A GEOARCHAEOLOGICAL STUDY OF THE ANCIENT QUARRIES OF SIDI GHEDAMSY ISLAND (MONASTIR,TUNISIA)

Amongst a large number of ancient quarries scattered along the North African coast, those at Sidi Ghedamsy (Monastir, Tunisia) have supplied building stones of Pliocene age. Two lithofacies have been distinguished in the quarry faces: (i) fine sandy limestone, which has been used in the construction of Roman and Arabic monuments; and (ii) porous and coarse limy sandstone, which is of bad quality for construction. Laboratory analysis results confirm that the exploitation of stone in antiquity was well focused on the levels containing the first type. This is confirmed by geotechnical tests, which show that the fine sandy limestone is harder and less porous than the coarse limy sandstone. Extraction of these stones began in the Roman period. The Romans exploited the quarries using steel tools that permitted the extraction of blocks from several levels. In the eighth century, Arabic quarry workers continued the stone extraction using the same technique, but they produced blocks of small and medium size. Statistical measurements have been done on the quarry faces and on the walls of the Ribat in order to understand the degree of conformity between the dimensions of the extracted blocks and those used for building, and ultimately to attempt to date the quarries and the construction of the Ribat.