The Mousterian lithic assemblage of the Ciota Ciara cave (Piedmont, Northern Italy): Exploitation and conditioning of raw materials
Abstract
The Ciota Ciara cave is situated in Monte Fenera’s karst (Borgosesia – Vercelli), at 670 metres above sea level. It is the most important evidence of a Middle Palaeolithic settlement in Piedmont: the cave was used by Homo neanderthalensis during the OIS 5, in a mild-humid period, as proven by faunal remains. The environment was characterized by deciduous woodland and glades. The intersection between different habitats, the presence of lithic raw materials, the karst morphology and water sources were certainly the main factors that encouraged human settlement during the Upper Pleistocene period, between 80.000 and 70.000 BP.
In 2009 systematic excavations began in the cave by the University of Ferrara, in partnership with the Soprintendenza per i Beni Archeologici del Piemonte e del Museo di Antichità Egizie. Research focused on the cave’s atrium where three stratigraphic units were investigated: 13, 103 and 14.
The exploited raw materials’ characterization were made by the stereo-microscope observations and through the SEM (Scanning Electron Microscope). Several lithologies are represented in different proportion: quartz is the predominant exploited raw material, followed by spongolite, sandstone, mylonite and opal. The archaeological record consists of various typologies of quartz: macro-crystalline pegmatite quartz, micro-crystalline pegmatite quartz and hyaline quartz. All these types of raw materials have been found in the proximity of the archaeological site, within 5 km range.
The lithic assemblage is made of flakes, retouched tools, cores and debris. The raw materials exploitation was achieved through the direct percussion technique with various methods: S.S.D.A., discoid and Levallois. The reduction sequences on quartz are complete, although no refitting was found. The reduction sequence is not complete for most part of the other raw materials. The débitage products are small-medium size (1-4 cm) and have different morphologies.
The use-wear analysis on quartz’s artefacts was carried out using the low power approach. The preservation state of the lithic assemblage is very good and no chemical, mechanical or post-depositional alterations are evident. The use-wear analysis shows a predominance of medium-hard and medium-soft materials processing.
The lithic industries characteristics show the production strategies adaptation typical of the Middle Palaeolithic to the characteristics of the non-sedimentary raw materials.
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