Search results for "geologia"
showing 10 items of 605 documents
Mineralogical and chemical variability of fluvial sediments: 1. Bedload sand (Ganga–Brahmaputra, Bangladesh)
2010
This study investigates the natural processes that control concentration of detrital minerals and consequently chemical elements in river sand. The novelty of our approach consists in the systematic integration of detailed textural, petrographical, mineralogical and chemical data, and in the quantitative description and modeling of relationships among mineralogical and chemical variables for each sample and each grain-size class in each sample. Bed sediment in transit in the largest sedimentary system on Earth chiefly consists of fine-grained lithofeldspatho quartzose sand including rich amphibole–epidote–garnet suites, mixed with minor very-fine grained-sand to silt subpopulations containi…
Markers of the last interglacial sea level high stand along the coast of Italy: Tectonic implications.
2006
A compilation of the Marine Isotope Substage (MIS) 5.5 high stand (similar to 125Ka) sites spanning the coastline of Italy allows a picture of the vertical displacement pattern affecting the Central Mediterranean coasts since the Late Pleistocene to be drawn. For each of the 246 listed sites, the accurate elevation of the high stand is defined through well-known markers. Coupled with a refilled age assessment locally Supported by new radiometric dating, these markers provide robust constraints oil deformation. Significant alongshore differences in site elevation between + 175 and - 125 m a.s.l. resulted from the interplay of regional and local tectonic processes, including faulting and volc…
The integration of surface and subsurface stratigraphic data with HVSR measures for studies of seismic microzonation: the case of Oliveri (ME)
2013
Because of its high seismic hazard the urban area of Oliveri has been subject of a study on seismic microzonation at first level (OPCM 3907/2010). The urban area develops on a large coastal plain made of Late Pleistocene and Holocene mixed fluvial/marine sediments, that mainly consist of silty sands and gravels. The eastern part of this plain is dominated by the alluvial deposits of the Elicona torrent. The coastal and alluvial sediments overlap a complexly deformed substrate made of Hercynian metamorphites (Aspromonte unit), the Capo d’Orlando Flysch, the Antisicilide Argille Scagliose and Pleistocene clays and calcarenites. This area is affected by high uplift rates as recently estimated …
Linosa: quando la geologia decide il destino di un’isola.
2015
La condizione odierna della flora ma anche dell'agricoltura di Linosa è molto diversa da quella della vicina Lampedusa per ragioni geologiche, il suolo vulcanico di Linosa ha influito sui caratteri della vegetazione dlel'Isola.
3.Storia, caratteri ed evoluzione dei boschi e dei rimboschimenti di Monte Morello e della Calvana _ 4. La vegetazione di Monte Morello e della Calva…
2016
il lavoro divulgativo espone un'attenta analisi dei caratteri geologici, pedologici, vegetazionale dei due rilievi della Toscana settentrionale, con particolare riferimento ai rimboschimenti storicamente realizzati e alla flora endemica. Il libro è ricco di schemi funzionali, illustrazioni didattiche e di una ricca raccolta fotografica.
Realizzazione della carta digitale dei suoli della Sicilia utilizzando il rilevamento GIS-oriented e un modello CLORPT
2011
Produrre una carta digitale dei suoli della Sicilia (1:250.000) di tipo quantitativo, che combinasse l’approccio tradizionale deterministico con un modello CLORPT, e introducendo nel fattore rilievo i processi geomorfologici è stato lo scopo della ricerca. 1.532 profili di suoli (1.363 analizzati) sono stati raccolti da bibliografi a e da rilevamenti precedenti. Una carta fisiografica della Sicilia è stata realizzata per fotointerpretazione e consultando 54 lavori pubblicati di geomorfologia. Altre informazioni geografi che sono state raccolte: una carta geologica della Sicilia, la carta dell’uso del suolo Corine 2000 e la precedente versione della carta dei suoli della Sicilia. La banca da…
Hatching Success of Caretta caretta on a Mediterranean Volcanic Beach: Impacts from Environmental Parameters and Substrate Composition
2022
New data on the potential impact of environmental parameters and the mineralogical nature of the substrate on the hatching success of the loggerhead sea turtle Caretta caretta on a volcanic beach on Linosa Island in the central Mediterranean Sea are reported. During 2 years of investigation (2018-19), five nests were observed. The temperature and moisture of the nests were determined along with the grain size and mineralogical nature of the substrate. The temperature values of the nests recorded at depths of 5 and 35 cm showed an average temperature incubation of 32.2°C ± 1.4°C and 32.8°C ± 1.6°C, respectively, with peaks close to 37°C. The sedimentological analysis carried out on two cores…
ASPRACOAST: A model of integrated coastal zone management of the eastern part of the Gulf of Palermo (Sicily, Italy)
2009
ASPRACOAST: Modello di gestione ambientale della fascia costiera del comune di Bagheria
2008
The Messinian Salinity Crisis deposits in the Balearic Promontory: An undeformed analog of the MSC Sicilian basins??
2021
International audience; The Messinian Salinity Crisis (MSC) is a controversial geological event that influenced the Mediterranean Basin in the late Miocene leaving behind a widespread Salt Giant. Today, more than 90% of the Messinian evaporitic deposits are located offshore, buried below the Plio-Quaternary sediments and have thus been studied mainly by marine seismic reflection imaging. Onshore-offshore records’ comparisons and correlations should be considered a key approach to progress in our understanding of the MSC.This approach has however not been widely explored so far. Indeed, because of the erosion on the Messinian continental shelves and slopes during the MSC, only few places in …