Francesco Breglia

A peculiar aspect of the archaeological site within Grotte di Pertosa-Auletta is the substantial preservation of the protohistoric wooden structures. The most spectacular evidences - today no longer accessible due to the construction of a concrete platform - consist in the wooden
floors of two different pile-dwelling levels, which were firstly excavated in the late nineteenth century. Giovanni Patroni, Paolo Carucci and Aurelio De Gasparis published several data concerning the plant remains discovered during their excavations. Therefore, in this paper, a review of the inferred archaeobotanical data from their studies is provided. Fortunately, several wooden poles have been preserved in the
riverbed area; they are still accessible and represent the main subject of this work. So far 86 poles, still deeply driven into the riverbed, have been identified and registered. We conducted a microscopic wood analysis on 46 samples taken from as many poles during the 2009-2013 research campaigns; furthermore 20 wood samples of uncertain attribution, found in a rich organic layer, have also been analyzed. A first result from this study is related to paleoenvironmental issues. The comparison between the archaeobotanical assemblages and the modern surrounding vegetation, in light of the paleoclimatic data available in literature, allowed us to elaborate a preliminary paleoenvironmental
reconstruction and to roughly locate the catchment areas of the wooden resources. The archaeobotanical study provided data about which wood was preferred as building material in this site during the Bronze Age.
Indeed these data allowed us to speculate about the knowledge of the proto-historic peoples who settled there in terms of mechanical properties of wooden materials and how and why they selected specific
wood types in relation to a wide spectrum of available forest resources.

Since the end of the 19 th century the Calabria region in southern Italy has been known for an abundance of grooved stone axes and hammers used during late prehistory. These artefacts are characterized by a wide and often pronounced groove in the middle of the implement, thought to have aided securing the head to a wooden haft. Their widespread presence is known both in prehistoric archaeological literature and in the archaeological collections of various regional and extra-regional museums. At first, scholars did not relate these tools to the rich Calabrian ore deposits and to possible ancient mining activities; they were regarded simply as a variant of ground lithic industry of Neolithic tradition. However, between 1997 and 2012, about 50 tools were discovered in the prehistoric mine of Grotta della Monaca in northern Calabria where there are outcrops of copper and iron ore. This allowed us to recognize their specific mining value and to consider them as a sort of "guide fossil" for the identification of ancient mining districts. This paper presents the results of a study involving over 150 tools from the entire region, effectively demonstrating an almost perfect co-occurrence of grooved axes and hammers with areas rich in mineral resources, especially metalliferous ores.

Grotta della Monaca is a karst cave located in Calabria, the southernmost region of the Italian peninsula. About half a kilometre deep, the cavern has drawn the attention of people since the Palaeolithic period due to the abundance of metal ores within (mainly iron hydroxides but also copper carbonates). These easily reachable minerals were exploited during prehistory, especially between the late Neolithic and the early Copper Age. Research conducted from 2000 to 2012 has allowed us to understand various aspects of ancient mining activities performed within the site and to reconstruct a basic operational chain concerning the procurement and the primary processing of such resources, from the choice of tools to the various extractive techniques, from the disposal of mining debris to the early operations of ore processing. In this paper we focus on two categories of macrolithic tools: those used to extract minerals, and those used for their primary processing. The first group is composed of 51 artefacts divided into axes, hammers, and pickaxes with a central groove, found in the deeper areas of the cave, which represent the mining areas. Their morphological and dimensional variability indicates a significant functional diversification; furthermore, the choice of different very hard metamorphic rocks implies a high awareness in the selection of the raw materials used for making these implements. The second group includes 22 tools with different functions-mainly made of sandstone-classified as querns, grinders and crushers. They were found in an underground area adjacent to the entrance, which is characterized by large and comfortable spaces, with the widespread presence of natural light. A recent traceological study has clarified the function of such artefacts; they were used to grind mined blocks of iron hydroxides to obtain a powder. The multidisciplinary approach adopted in studying mining tools from Grotta della Monaca, including petrographic, typological and use-wear analysis, has allowed us to gain important knowledge about the general characteristics of these tools.