Headland or stack? Paleogeographic reconstruction of the coast at the Faraglioni Middle Bronze Age Village (Ustica Island, Italy)

The Faraglioni Village at volcanic island of Ustica (Palermo, Sicily) is one of the best preserved coastal Middle Bronze Age site of the Mediterranean area. It was built on a marine terrace overlooking the sea. Although the southern border of the Village is well defined, many doubts concern its past extent toward the sea. Around 3250-3200 BP the inhabitants suddenly abandoned the site, leaving all their belongings. This sudden flight could be related to a natural disaster that induced the population to find a safer place, or to a hostile invasion from the sea. The coast is formed by 20 m-high sea cliffs, which are often subject to collapses. A small platform develops at the cliff toe and it is locally covered by a beach with pebbles, cobbles and rounded blocks. Off-shore, in front of the archaeological village, a stack, called Colombaio, occurs. It is 17 m x 11 m wide at the top, roughly at the same elevation above the sea level of the terrace on which is located the Faraglioni Village, and it lies about 60 m from the sea cliffs. The latter are cut in columnar basalts, roughly 1 meter in size. A sea cave, 14 m long, 6 m large and 9 m high was discovered inside the stack during the field surveys. There are many submerged or slightly emerged rocks in the canal between the stack and the mainland. Since archaeological remains have been found on the top of the stack, archaeologists suppose that there was a connection with the mainland. Literature suggested that most probably a natural bridge connected the stack and the coast; and that it collapsed as a result of a natural catastrophic event, such as an earthquake. Bathymetric data compared to the sea level change models suggest that the area of the village was largest than nowadays, but the retreat rate is unknown, so it is impossible to estimate the Bronze Age extent of the village and assert that it was certainly connected with the stack. The separation of the stack from the coast could have happened long time before the Bronze Age. Probably, only the so-called Nerone stack was connected during the Bronze Age. However, it is not necessary to hypothesize the occurrence of a natural \u201cbridge\u201d or a human-made connection with the stack from the mainland at the same elevation of the village, because during the Middle Bronze Age, about 3400-3200 BP, the sea level was 3 meter lower than today and the path between the mainland and the stack was about 1 m above the past sea level. The stack was isolated from the village only during severe storms

Shore grykes along the western Istrian coast

We provided new data on topography, morphology and physical/chemical parameters (pH, T, NO2-, Ca2+, PO43-, NaCl) collected in several shore grykes along the Northwestern Istrian coast, between Savudrija and Zambratija. Six transects, eachcontaining four to five pools, have been surveyed. Three morphological zones have been identified along the selected profiles. Morphological features of the shore grykes along the western Istrian coast are, in fact, closely related to the local tide. High-level pools are affected by karstic processes, and the surface is usually smooth. At their bottom, terrigenous deposits, mainly terra rossa, occur. Seaward, bioerosion prevails and at the bottom of the grykes, sand and rounded pebbles have been found. Chemical/physical parameters suggest that grykes located at lower altitudes are affected by seawater factors, while pools located at increasing altitudes are affected mainly by rainfall and consequentially freshwater or saltwater remaining from rainfalls or storm events. Shore gryke genesis is strongly controlled by geological weakness, along whichthey develop. Their origin is in fact due to local tectonics, while their development is related to the active vertical tectonic subsidence of the study area. Pools located at higher altitudes are mainly affected by solution karst processes, but due to the tectonic downdrop of the area, when the grykes come in contact withsea, they are gradually shaped by marine processes

Marine notches in the Maltese Islands (central Mediterranean Sea)

We present the first detailed survey of tidal notches in the central Mediterranean area, in particular along the coastline of Gozo and Comino (Malta). The Maltese Islands represent one of the few sites in the Sicily Channel which exhibits coastal carbonate rocks. Marine notches on the islands of Gozo and Comino were surveyed by means of a seven day continuous snorkeling survey around the entire perimeter of the two islands. We surveyed the occurrence, lack and typology of marine notches and we correlated them with late Holocene sea level changes. Sea temperature (T) and electrical conductivity (EC) were collected along the route in order to locate the submarine springs and to relate them to the surveyed notches.A well-carved continuous roof notch was discovered along most of the plunging cliffs. It is well-carved out, in particular along the northern and western coast of Gozo. It develops from about 0.2 m above the mean sea level down and it can be up to 1.5–2 m deep. On the contrary, tidal notches are localised only in 8 sites. In 2 sites, Vermetid trottoirs develop at low tide level. In addition, at about −7 m to −10 m m.s.l., a 2–5 m wide marine terrace develops along extensive tracts of plunging cliffs, always in correspondence with the roof notches. This submerged terrace seem to be the result of the late Holocene slowdown of the sea level rise, which started to smooth the terrace and to carve out the submerged part of the roof notch, thanks to the exposed location of the islands and the favourable lithology.Through the collection of hydrological data, the presence of 21 submarine springs were detected. They occur mainly in the south-western coast of Gozo and on eastern coast of Comino. Anyway, marine notches seem not to be related to the freshwater outflow, such as those in the Adriatic Sea, because the studied islands are very exposed. As a consequence, along the Maltese islands bioerosion seems to be the most effective process in notch development.peer-reviewe

Geology of the Classical Karst Region (SW Slovenia–NE Italy)

ABSTRACTThe paper aims to present the geology of the western part of the Classical Karst (NW Dinarides), located at the border between Slovenia and Italy. The work is based on archive, published and new data collected by Slovenian and Italian researchers within several scientific national and Cross Border Cooperation projects. The map, produced at a scale of 1:50,000, summarizes the lithological and structural setting and is supplemented by three geological cross-sections of the study area

Nucleation, reorganization and disassembly of an active network from lactose-modified chitosan mimicking biological matrices

Developing synthetic materials able to mimic micro- and macrorheological properties of natural networks opens up to novel applications and concepts in materials science. The present contribution describes an active network based on a semi-synthetic polymer, a lactitol-bearing chitosan derivative (Chitlac), and a transient inorganic cross-linker, boric acid. Due to the many and diverse anchoring points for boric acid on the flanking groups of Chitlac, the cross-links constantly break and reform in a highly dynamic fashion. The consequence is a network with unusual non-equilibrium and mechanical properties closely resembling the rheological behavior of natural three-dimensional arrangements and of cytoskeleton. Concepts like network nucleation, reorganization and disassembly are declined in terms of amount of the cross-linker, which acts as a putative motor for remodeling of the network upon application of energy. The out-of-equilibrium and non-linear behavior render the semi-synthetic system of great interest for tissue engineering and for developing in-vitro mimics of natural active matrices

Platy limestones. 10 case studies in the Classical Karst

Il progetto RoofOfRock, finanziato nell’ambito del 2° bando di cooperazione transfrontaliera dell’Adriatico IPA 2007-2013 è iniziato nell’ottobre 2012, si concluderà a fine settembre del 2015 e coinvolge 10 partner di 4 nazioni: Slovenia, Italia, Croazia e Bosnia Erzegovina. In qualità di partner associato e stakeholder partecipano le regioni Friuli Venezia Giulia e Veneto. Il progetto RoofOfRock ha tra le sue finalità quelle di proporre un utilizzo del calcare tabulare compatibile con l’ambiente, di favorirne la protezione e la promozione nonché di elaborare delle linee guida utili per una sua valorizzazione come patrimonio naturale e culturale.Pri projektu RoofOfRock, ki je bil izbran za sofinanciranje v okviru 2. poziva Jadranskega čezmejnega programa IPA 2007–2013, sodeluje deset projektnih partnerjev iz štirih držav, in sicer iz Slovenije, Italije, s Hrvaške ter iz Bosne in Hercegovine. Projekt se je začel izvajati oktobra 2012 in se bo zaključil konec septembra 2015. Pri projektu sodelujeta tudi italijanski pokrajini Furlanija - Julijska krajina kot deležnik in Benečija kot pridruženi partner. Namen projekta RoofOfRock je vzpostaviti skupni temelj za trajnostno rabo, zaščito in promocijo ploščastih apnencev ter oblikovati uporabne smernice za trajnostno upravljanje ploščastih apnencev kot skupne naravne in kulturne vrednote na celotnem projektnem prostoru.The RoofOfRock Project is being implemented under 2nd call for ordinary projects of Adriatic IPA CBC Programme 2007, joining 10 partners from 4 countries Slovenia, Italy, Croatia and Bosnia and Herzegovina. It started in October 2012 and is going to be implemented until the end of September 2015. Two Italian Regions Friuli Venezia Giulia and Veneto are participating as stakeholder and associate partner . The RoofOfRock intention is to establish joint platform for platy limestone sustainable use, preservation and promotion, to create the relevant guidelines and to upgrade both individual and joint capacities in preserving such common natural and cultural heritage

Georisks in the Mediterranean and their Mitigation

The accumulation of large boulders related to waves generated by tsunami and extreme storm events have been observed in different areas of the Mediterranean. Along the NE and E low-lying rocky coasts of Malta tens of large boulder deposits have been recognised and mapped (Furlani et al., 2011; Mottershead et al., 2014). These boulders are detached and moved by the seafloor by the action of sea waves. Reconstructing the history of these blocks and distinguishing events, such as storm waves or tsunami, play a crucial role in assessing the coastal vulnerability and risk. The Maltese coasts are seasonally affected by extreme storm waves: heavy seas are in fact frequent and are originated by the NE and NW winds. Moreover in the past some important tsunami events which occurred in the Mediterranean Sea, such as the 1693 and the 1908, have been reported on the historical chronicles of Malta (Galea, 2007). The seismicity is related mainly to the Malta Escarpment, the Sicily Channel Rift Zone and the Hellenic Arc. In this study we present a multidisplinary approach, which aim to characterize the boulder accumulations in order to assess the natural hazard for the coasts of Malta Island, where extreme waves have been and are able to detach and move large rocky blocks on the coast.peer-reviewe