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Geografia e Geologia Militare.
No full textNumero speciale di Geologia dell’Ambiente (rivista della SIGEA) dedicato alla geografie e geologia militare
Geomorphology and prehistoric settlements on a volcanic island: The case of ustica (Palermo, Italy)
Full text linkThis study represents the first attempt to combine the geomorphological characteristics of the island of Ustica with the human settlements that have been established during prehistory, with the purpose of reconstructing the interactions between communities and the natural environment from the Neolithic to the Middle Bronze Age (6th-1st millennia B.C.). Ustica is a small island in the Southern Tyrrhenian Sea, visible but far (~55 km) from the northern coast of western Sicily. Its rugged volcanic nature, remodeled and enriched by the sea, offered to the first colonizers a wide repertoire of opportunities and challenges. This island can be treated as an ideal “laboratory” to understand how settlers, taking their first steps towards the foundation of organized communities, were able to seize opportunities or succumb to obstacles. The review of archaeological research until now carried out in Ustica, integrated with geomorphological data and other biogeographical indicators, offers a picture of the prehistory of Ustica in which human presence is continuous and distributed in various sites of the island characterized by different physiographic characteristics. There are phases dominated by the choice of naturally protected sites and phases in which settlements expands on open land, suitable for agricultural use. Where the archaeological evidence is scarce, the geomorphological peculiarities allow us to decipher the vocations and characters of a human settlement. The study leads to an open question: in the Middle Bronze Age, after about five thousand years of uninterrupted habitation of Ustica, which factors, geological, social, or other, induced the early communities to abandon the island, without returning there for about eight centuries, until the Hellenistic-Roman age?
Geo-archaeology of the Grozzana area (N–E Italy)
Full text linkThe extensive analysis of remote-sensed data (among which ALS-derived images) and fieldwork carried out in the Trieste Karst (N–E Italy) have shed light on archaeological landscapes largely unknown until recent years. The chronological definition of this complex palimpsest was based on the collection of findings associated to the archeological evidence, shape and orientation of detected structures and stratigraphic relations among features. This allowed to evaluate the interplay between landforms through time and to reconstruct some long-term economic strategies pursued by past communities. As a result, we present a 1:5000 map of the easternmost sector of the Trieste area, next to the border between Italy and Slovenia, approximately corresponding to the area of the map Carta Tecnica Regionale ‘Grozzana’. The map aims at providing a tool for the protection of the cultural and environmental heritage, land use planning and touristic valorization of the area
Seawater and Biokarst Effects on Coastal Limestones
Full text linkCoastal limestones are characterized by a typical set of morphologies throughout the world, related to a combination of
physical, chemical, and biological processes, the relative importance of each depends on geographical and local conditions.
In tropical and temperate areas biological processes are dominant, whereas at high latitudes physical abrasion becomes
more important. The morphology of limestone coasts depends on a wide set of interrelated processes that are locally
contingent and, therefore, cannot be described by a global scheme
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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