Towards a revised stratigraphy for the Middle to Upper Palaeolithic boundary at La Guelga (Narciandi, Asturias, Spain). Soil micromorphology and new radiocarbon data

The archaeological sequence of the Palaeolithic site of La Guelga apparently shows an interstratification of Aurignacian between the Mousterian and Chatelperronian layers, a sequence which disagrees with the stratigraphic model for the Middle to Upper Palaeolithic transition in SW-Europe. We analyzed the witness section of the interior sector in archaeological zone D using micromorphology and collected new radiocarbon dates for the Aurignacian and presumably Chatelperronian levels in order to provide detailed sediment descriptions of the site and scrutinize the presumed interstratification. Thin sections from Mousterian levels 8 and 9 show microstratification, signs of trampling and preferential sub-horizontal orientation of elongated particles. These features are less strongly developed in the Aurignacian deposit of levels 5 and 6 and are lacking in the presumably Chatelperronian ones of levels 1 and 2. The deposits of the latter show other features of reworked slope deposits such as a randomized distribution of limestone clasts. Radiocarbon dating on bone samples from level 2 places this layer to between similar to 41.5 and 45 ka cal BP, hence older than Aurignacian level 5, dated to between similar to 35.5 and 41.5 ka cal BP. Comparative dating of bones with and without ultrafiltration pretreatment conducted in two different laboratories yielded results in excellent agreement. Overall, the micromorphological observations and new radiocarbon ages strongly suggest that the few finds of presumably Chatelperronian affinity and sediments of levels 1 and 2 were transported by slope processes into the shelter

The middle palaeolithic site of Vajo Salsone in the monti Lessini, Italian Alps. First report on the archaeofauna and lithic assemblage with foliate tools

This first report aims to illustrate the Middle Palaeolithic site of Vajo Salsone in the Monti Lessini plateau in the eastern Italian Alps, its geological and geomorphological context, the conditions leading to its discovery occurred after a road cutting, and the archaeological excavation of a karst structure where the sediments, faunal and cultural remains were still preserved. The karst infill is a massive clast-supported breccia with abundant animal bones and lithic artifacts coated of carbonate encrustations. The first analysis of the samples of small and large mammal assemblages recovered in the karst deposits has revealed the abundance of Microtus arvalis, a rodent currently reported to live in open environments and in relatively drier regions of northern Italy. Still, mosaic habitats with the presence of stony areas and scattered low scrubs are suggested by the presence of H. viridiflavus among the herpetofauna. Amongst the abundant faunal assemblage, the most common represented species are Cervus elaphus, Capreolus capreolus and Rupicapra rupicapra along with few carnivores. At the present state, only red deer bones showed taphonomic evidence ascribable to hunting and exploitation, similarly to other Middle Palaeolihic sites of the region. The lithic industry consists of a huge number of chert artifacts produced using Levallois as the main knapping method together with an ephemeral use of discoid and volumetric blade exploitation. No appreciable difference in the taphonomic layout has been observed between the by and end-products of these technologies. Predetermined blanks, cores and numberless of flat, elongated, cortical flakes attest the integrity of the Levallois reduction sequences. Retouched tools are mostly simple, double, often converging and, occasionally, transverse scrapers, and retouched points. In addition to these typical Mousterian tools, the distinguishing feature of Vajo Salsone is the presence of foliate tools made through invasive bifacial shaping, an already known model in Central Europe. Based on what resulted from our preliminary data, we have provisionally reconstructed the morphogenesis of the site in accordance with the following hypothesis: 1) in the basal part of a wall, inside a large natural niche evolved by weathering and karst processes, groups of Neanderthals settled, leading to the deposition of anthropogenic sediments; 2) following phenomena of rockfall and toppling of large blocks, retreat of the wall and dismantling of the large niche occurred, together with the erosion of the sediments of the shelter. These sediments were transported down-valley and partly trapped in a small karst shaft. Even though most of the evidence from the Vajo Salsone lithic assemblage is comparable with the one of other sites in the region and the northern Mediterranean area, it does however provide new details about the Late Pleistocene cultural scenario, thus contributing to enrich the Middle Palaeolithic picture