Datar l'art. L’arqueometria aplicada a l'estudi de l'art rupestre prehistòric

Dating Art. Archaeometry applied to studying historic cave paintings.For some years now, the study of prehistoric cave paintings has been enriched by the use of archaeometric absolute dating techniques and the analysis of the pigments and dyes used to draw them. Not only have these techniques allowed a better understanding of the nature of some parietal groups, but have also caused an authentic shock, putting into question some of the prevailing ideas about their chronology or their meaning

The Final Authority Analysis: A Unified Approach to Municipal Liability Under Section 1983

The neighbouring effect of organic fields on revenues and costs of conventional arable crop farms is tested. For this, a standard econometric model is applied to fine resolution economic and pedo-climatic data in the Deux-Sèvres département in Western France. The impact of the vicinity to organic farms on production small but significant and negative. This may either be explained by a slightly higher infestation rate or by a remnant of correlation between organic field location and poor soil quality uncontrolled for by the pedo-climatic data. In any case, a high positive impact of the vicinity to organic fields mediated by crop auxiliaries is unlikely in this region. There is no impact of the vicinity to organic farms on crop protection costs. This could be explained by a routine behaviour of conventional farmers regarding crop protection or by social interactions between organic and conventional neighbours

Cambios en los modelos económico y de ocupación del Abrigo de la Quebrada (Chelva, Valencia). Nuevos datos arqueozoológicos y tafonómicos del nivel VII (MIS 5)

Abrigo de la Quebrada (Chelva, Valencia) is a site of Neanderthal occupation, which has contributed a sequence spanning from MIS 4-5, in the upper levels, to MIS 5, in the lower levels. Level IV shows short and repeated occupations, with a high density of finds related to hunting, and is representative of the upper part of the sequence. The lower levels are distinct, in terms of both sedimentation rate and mode of occupation. In this work, we present the results of the archaeozoological and taphonomic studies carried out for level VII. Neanderthals accumulated most of the ungulate remains, while the leporids, the birds and a few of the ungulate remains are non-anthropogenic. Human hunting focused on Equidae, Cervidae and Caprinae. Combined with the characteristics of the stone tool assemblage and spatial distribution patterns, these faunal results for level VII suggest human occupations that were more marginal, more sporadic and also likely to have involved smaller group sizes than those in level IV.info:eu-repo/semantics/publishedVersio

Le Gravettien de la côte méditerranéenne Ibérique = Gravettian in the Iberian mediterranean coast

Even if data coming from Gravettian of the iberian mediterranean coast are few, and only some of them in consistent stratigraphic contexts, we review in this paper some of the main sites (Reclau Viver, L’Arbreda, Parpalló, Malladetes, Beneito and Cendres); all them, with other minor sites, can give us a global perspective of iberian mediterranean Gravettian, with little presence in the early moments, but with classical lithic and bone industries in the middle and late periods of this phaseMême si les données disponibles pour le Gravettien méditerranéen ibérique sont réduites et dans des contextes stratigraphiques mal définis, nous présentons dans ce travail les révisions de quelques sites majeurs (Reclau Viver, l’Arbreda, Parpalló, Malladetes, Beneito et Cendres ainsi que de quelques autres gisements. La vision globale du Gravettien méditerranéen ibérique nous montre, dans la période ancienne, une faible présence mais une industrie lithique et osseuse très classique est observée dans les phases moyenne et finale de la périod

Application of field portable EDXRF spectrometry to analysis of pigments of Levantine rock art

International audienceThe results of the analyses of elemental composition of red and black pigments of Levantine rock art from La Saltadora rock shelters (Valltorta gorge, Castelí on, Spain) are presented in this paper. Nondestructive analyses were carried out using a portable energy dispersive X-ray fluorescence (EDXRF) spectrometer developed for in situ analysis. The results revealed the strong presence of calcium in all the analyzed locations due to the contribution of the underlying calcareous bedrock and the overlying crust. Iron is the main element detected in red pigments and manganese in black pigments. Iron and calcium ratios have been found indicative of the degree of preservation of the pictorial layer. Trace elements detected in the pigment composition confirm the use of different raw materials. Therefore, this work illustrates the potential of the portable EDXRF spectrometers for in situ analysis of rock art paintings