Search results for "orf"
showing 10 items of 1406 documents
Anthropogenic sinkholes in the Marsala area (western Sicily) linked to underground quarries
2012
Analisi numerica dei processi di instabilità in cave sotterranee
2014
La presenza di estesi sistemi caveali in sotterraneo, utilizzati nel secolo scorso per l’estrazione di materiale da costruzione in diversi contesti del territorio italiano, di frequente determina situazioni di pericolo per l’ambiente antropizzato, a causa dello sviluppo di processi di instabilità, che possono propagarsi verso l’alto, sino a raggiungere la superficie. Specialmente nei casi in cui la memoria storica della presenza ed estensione delle cave sotterranee è andata persa, lo sviluppo urbanistico dei centri abitati nel corso degli ultimi decenni può avere determinato la realizzazione di abitazioni ed infrastrutture al di sopra, o nelle immediate vicinanze, di zone interessate da com…
Assessment of hydro-erosive processes in small steep coastal basins in Liguria and Sicily, Italy
2015
The steep Mediterranean catchments underwent drastic socio economic changes in the last decades. Moreover, these basins are also subject to climate variability and potential future climate change effects. Due to mechanization in agriculture a lot of surfaces changed from terraced vineyards and olive growth to abandoned land. The terraced areas are less productive and more cost and labour intensive and hence cannot compete with a highly mechanized agriculture. Furthermore, tourism based on the natural and cultural heritage of the region is more and more important for the income of the inhabitants. The abandonment has effects on the entire landscape system in terms of hydrological dynamics, s…
Definizione di scenari critici di innesco per soil slips mediante l'applicazione di un modello di stabilità dei versanti.
2008
Riscoperta di alcuni ipogei artificiali nel Comune di Sutera (Caltanissetta, Sicilia centrale)
2020
Grazie ad approfondite ricerche di archivio e accurate indagini speleologiche, sono stati ispezionati e documentati diversi ipogei artificiali presenti nel comprensorio di Sutera (CL). L’area di Sutera, caratterizzata da affioramenti evaporitici messiniani e non lontana da importanti miniere di salgemma e di zolfo, ha subito una veloce corsa verso la ricerca di minerali pregiati intorno ai primi del ‘900. A memoria di queste attività sono rimaste diverse tipologie di cavità, quali: gallerie di carreggio, discenderie per ricerca mineraria, ma anche antiche cisterne per la raccolta d’acqua dove recentemente, a seguito di operazioni di ripristino e pulizia, sono stati effettuati importanti rit…
Deep-seated gravitational slope deformations in western Sicily: Controlling factors, triggering mechanisms, and morphoevolutionary models
2014
Abstract A study of deep-seated gravitational slope deformation (DSGSD) phenomena affecting areas of various geological and geomorphological settings in western Sicily is described. Western Sicily is underlain by a thin-skinned imbricate wedge of Meso–Cenozoic carbonate and siliciclastic rocks that formed by the stacking of several thrust nappes over the Iblean foreland. Locally, the original thrust sheets are folded and cut by high-angle faults. Large areas of western Sicily now display high relief energy due to Plio-Pleistocene block-faulting and uplifting, and the Quaternary morphogenetic phases are characterised by incision, thereby triggering widespread DSGSDs. To identify controlling …
MILLSTONES COASTAL QUARRIES AS INDICATOR OF RELATIVE SEA LEVEL CHANGES
2012
The Italian coasts shows numerous archaeological remains which reveals the activities that were carried out along the coast for thousands of years of history. In order to use archaeological structures for coastal studies, an accurate estimate of their relationship to the sea level at the time of construction is required (Lambeck et al 2004, Antonioli et al 2007, Auriemma & Solinas 2009). Millstone coastal quarries are only documented in southern Italy; they are carved on beachrock, calcarenites and other sedimentary rock easy to be exploited. Few archaeological information have been published about quarries for millstones extraction; they are documented since around 2500 yr BP (Amouretti, 1…
Geomorphological map of urban area of Palermo (Italy)
2018
The results of a geomorphological survey carried out in the urban area of Palermo are described. The study area is located in the northern margin of Western Sicily and is part of the SE-verging Alpine orogenic belt (Catalano et al., 2013). An E-W mountain range (Sicilian Apennines) is the topographical expression of this belt (Di Maggio et al., 2017). In the Palermo area, the physical continuity of the mountain range is broken by a large topographically-depressed coastal area. This area is set on a half-graben and is characterized by a plain (Conca d’Oro plain), opened to sea and surrounded by wide scarps hundreds of meters tall to the inland. The wide and tall scarps are abandoned coastal …