Search results for " Paleoecologia"

I popolamenti faunistici pleistocenici della Sicilia.

2008

A revision of medium and small sized deer from the Middle and Late Pleistocene of Calabria and Sicily

2001

The remains of Megaceroides calabriae from Middle Pleistocene deposits at locality Bovetto (Southern Calabria) and of Megaceroides carburangelensis from the late Middle and Late Pleistocene locality Cimillà (South-eastern Sicily) are revised. These deer were considered as endemic species of strongly reduced size, related to genus Megaceroides (=Praemegaceros), which evolved in insular environment similarly to the endemic megaceroids from Sardinia, Corsica and Crete, M, cazioti and M. cretensis. The comparison of M. calabriae and M. carburangelensis with representatives of genera Megaceroides and Dama, carried out in the present study, shows that the Calabrian and Sicilian deer belong to Dam…

Pleistocene Calabrian and Sicilian bioprovinces

2002

During the Pleistocene, southern Calabria was the area through which several mammalian taxa dispersed into the Sicilian island via the Straits of Messina. The rich fossil record of Sicily allowed for the construction of a fairly detailed bio-chronological frame that is dated by correlation of vertebrate bearing deposits with marine deposits. At present five Faunal Complexes (F.C.), characterised by the occurrence of different taxa, have been recognised. The two older Faunal Complexes (Monte Pellegrino F.C.'xes Elephas falconeri F.C.) include taxa with differently marked endemic features denoting the occurrence of an insular system made up of geographically isolated small islands, with very …

Dating of a Sediment Core by 210Pbex Method and Pb Pollution Chronology in the Palermo Gulf (Italy)

2009

Within a more general study on marine sediments in the Gulf of Palermo (Sicily, Italy), the 210Pbex dating method (using a model with constant sedimentation rate) has been applied to one sediment core. The main goal of the research was to study the Pb pollution chronology. Dating of the core has allowed evaluating the time evolution of the gulf lead concentrations. Specific activities of 137Cs have also been measured in the sediment core sections as an independent confirmation of the chronology derived by the 210Pbex method. The time scale has then been used to correlate lead concentrations in core sections to estimated lead emissions in air due to gasoline combustion. A good correlation be…

Distribution of Heavy Metals in Marine Sediments of Palermo Gulf (Sicily, Italy)

2008

Concentrations of Cr, Cu, Hg, Pb and Zn have been measured, by atomic absorption spectrophotometry, in the fine fraction (<63 μm) of surface sediments collected in 30 sites in the Palermo Gulf (Sicily, Italy) in order to assess the levels and the spatial distribution of these elements. Enrichment factors calculated with respect to clean areas have been considered to discriminate between levels due to background or to pollution contributions. The sampling stations, which form a grid inside these areas, are characterized by geographic proximity and by the presence of pollution sources. Ratio matching technique along with hierarchical clustering, minimum spanning tree and principal component a…

Pylogenetic history and biogeographic aspects of fossil and extant Terricola (Mammalia, Rodentia) of Southern Italy: a case study

2009

Vertebrate biological events and Pleistocene biogeographic history of Sicily

2009

Bio-chronology of pleistocene vertebrate faunas of sicily and correlation of vertebrate bearing deposits with marine deposits

2003

The rich Pleistocene fossil record of Sicily allowed the construction of a fairly detailed bio-chronological frame that is dated by correlation of vertebrate bearing deposits with marine deposits by geochemical and radiometric dating too. Actually, an important category of deposits is representative of transitional and neritic environments, frequently associated with a lagoon or swamp. Limnic deposits related to small freshwater basins also occur, often in relation to coastal and fully marine deposits. Numerous relationships have been found between the vertebrate bearing deposits and marine deposits, which can be correlated with the δ18O isotopic record and the main palaeogeographic events …

Pedostratigraphic notes on the middle - late pleistocene of capo san vito peninsula (NW sicily)

2002

The available data about Quaternary pedostratigraphic of North-Western Sicily are mainly obtained when fossil vertebrate assemblages are studied. These are often found in caves or in other morphological "traps", where the products of the erosion of soils developed outside these features are redeposited. Soils that may have originated these deposits were found on the marine terraces that are typical of the coast areas of Sicily. Two sequences, called "K22" and "Isolidda", that crop out in the North-Western side of the San Vito lo Capo peninsula -to the West of Palermo -are examined in this work. The first one is a karstic cave infilling, situated near the eastern rim of the old falaise that …

Osgillazioni eustatiche, biocronologia dei depositi continentali quaternari e neotettonica nella Sicilia nord-occidentale (penisola di San Vito lo Ca…

1999

Vengono presentati i risultati di uno studio interdisciplinare condotto nella Penisola di San Vito lo Capo, Sicilia nord - occidentale. In questa area i terreni quaternari sono rappresentati da depositi marini e di spiaggia distribuiti a varie quote e da depositi continentali contenenti resti di vertebrati. Questi terreni si rinvengono all'interno di solchi e grotte marine, dove sono state riconosciute anche fasce a fori di litodomi, o costituiscono corpi sedimentari che giacciono sopra superfici di abrasione marina. Le associazioni a mammiferi presenti in tali terreni appartengono al complesso faunistico a Elephas falconeri del primo Pleistocene medio, al complesso a Elephas mnaidriensis d…