A NEW METHOD TO DATE PETROGLYPHS

A new calibrated method based on erosion phenomena is presented for the dating of petroglyphs (rock carvings and engravings) and geomorphic surfaces. In contrast to previous methods of petroglyph dating, which sought to determine the age of various mineral and organic deposits coating the art, microerosion analysis attempts to ascertain the time of mark production itself, by creating a geomorphologically based time frame. The method involves the establishment of calibration curves for the crucial variables to be considered. These are the rock type and climate of a particular region, microerosional indices and age. The theory, practical application, and prerequisites of the method are considered, and the paper concludes by defining the disadvantages and advantages of the method.     

OPTICAL DATING OF SINGLE AND MULTIPLE GRAINS OF QUARTZ FROM JINMIUM ROCK SHELTER,NORTHERN AUSTRALIA: PART II,RESULTS AND IMPLICATIONS*

Quartz sediments from the floor deposit at Jinmium rock shelter have been investigated using the multiple-grain and single-grain optical dating methods described by Galbraith et al. (1999, this volume). Here we present the results of this dating programme and argue that the artefact-bearing sediments were deposited within the last 10000 years. This time interval is consistent with the radiocarbon chronology but is much younger than previous claims for initial human occupation during the Pleistocene. Analysis of individual grains revealed also that the characteristic saturation doses of some grains are unusually high, which may permit dating of deposits older than a few hundred thousand years. Such grain-to-grain differences raise doubts, however, about the validity of using multiple-grain samples to investigate the phenomenology of quartz luminescence.     

The Evolving Relationship between the Côa Valley Archaeological Park and the Local Community: an Account of the First Decade

Abstract

The Côa Valley Archaeological Park (PAVC) reaches its 13th birthday in August 2009. Although the relationship between the Park and the local community has not always been unproblematic, the last few years have witnessed a major shift in the situation. While some misunderstandings still exist, recent efforts made by the PAVC, specifically enhancing education services involving local schools in heritage management and conservation, and in organizing activities aimed at the local population, have helped develop ties with the community.     

Places of Power: Control,Public Access and Authenticity at Rock Carvings in Tanum,Sweden and Val Camonica,Italy

Abstract

This article presents a critical and ethnographically directed discussion and comparison of how the World Heritage listed rock carvings at Tanum, Sweden and Val Camonica, Italy are managed and made accessible to the public. The article focuses on how the Swedish and Italian heritage management cultures view the rock carvings as an authentic (i.e. genuine) phenomenon firmly, and solely, belonging to the past and how this contemporary embedded and constructed narrative leads to specific ways of managing, constructing, organizing, presenting, and staging these places for the public. The article stresses that even if the rock carvings were produced in the past, their authenticity is also a product of their role in contemporary negotiations of interpretive supremacy, control, and power between the culture of heritage management and the public. An ethnographical approach, and ethnographical methods, are used. This approach has implications for archaeology and its public relations; in the light of it, activities and phenomena that seem to be completely normal are revealed as examples of the specific culture of contemporary archaeology and heritage management. It is stressed that this culture and its rituals need to be further examined from an ethnographic point of departure.     

MULTIANALYTICAL STUDY OF PALAEOLITHIC REINDEER ANTLER. DISCOVERY OF ANTLER TRACES IN LASCAUX PIGMENTS BY TEM*

Palaeolithic and modern reindeer antler were analysed using complementary techniques to evaluate the conservation state of bone material. X‐ray diffraction, FT‐IR spectroscopy, scanning electron microscopy (SEM–EDX) and transmission electron microscopy (TEM–EDX) as well as proton induced X‐ray and γ‐ray emission (PIXE–PIGE) at the particle accelerator AGLAE, C2RMF were applied. This study enabled us to define the chemical and structural features of ancient antler at the micro‐ and nanometre scale and compare them to those of other bone materials such as bone and ivory. Antler is richer in its organic fraction compared to bone and ivory. Its mineral fraction, carbonated hydroxylapatite, shows very specific crystal shapes at the nanometre scale. This specific property allowed us to recognize antler traces in pigment samples originating from rock art paintings in the Lascaux cave, Dordogne, southwestern France, Magdalenian period. Therefore, TEM–EDX is the technique of choice for characterizing antler traces in complex mixtures. In the paint material of Lascaux, antler seems most likely to be a pollutant introduced either by stirring the pigments in water with a piece of antler or by carving antler artefacts next to the preparation of paint material. However, it could eventually be used as a marker of paintings that were created contemporaneously.