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Bellucci, L.
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Bellucci, L.
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- PublicationOpen AccessReworked Coccoliths as runoff proxy for the last 400 years: The case of Gaeta Gulf (central Tyrrhenian Sea, Central Italy)(2016)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; We present the results of a high resolution study carried out on a shallow water sediment core, recovered in the central Tyrrhenian Sea to reconstruct the runoff story of the catchment basin of Volturno and Garigliano rivers (Gulf of Gaeta, Italy), over the past ~400years. We compared the abundance distribution pattern of Reworked Coccoliths to the surface runoff model simulation for the Volturno and Garigliano rivers hydrographic basins, the Global Historical Climatology Network index, the Palmer drought severity index, the Tevere river discharge anomaly, the summer average rainfall of the Southern Italy and the North Atlantic Oscillation reconstructed signal. This comparison suggested that the biotic signal of the Reworked Coccoliths may be used to detect climatic events from local to “global” scale. The calcareous nannofossil assemblages as well as their diversity index are modulated by oscillation in solar activity, where minima in solar activity correspond to minima calcareous nannofossil diversity and viceversa. In particular, the antiphase correlation between the abundance of Reworked Coccoliths and the North Atlantic Oscillation index, which modulates the winter precipitation, suggests that this biotic index could be used as a reliable proxy to reconstruct the variations in the hydrographic basin runoff of the Volturno and Garigliano rivers. In addition, power spectral and wavelet analysis carried out on both signals documented the occurrence of climatic cycles of the duration of about 95yr. From 1900 AD upwards, a turnover in the periodicity from 95yr climatic cycles to 22-26 yr cycles occurred in the Reworked Coccoliths signal, suggesting a strong control of solar forcing (Hale cycle) over the last century.293 148 - PublicationRestrictedPossible tsunami signatures from an integrated study in the Augusta Bay offshore(2011-01-23)
; ; ; ; ; ; ; ; ; ;Smedile, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;De Martini, P. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Pantosti, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Bellucci, L.; CNR-ISMAR Bologna ;Del Carlo, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Gasperini, L.; CNR-ISMAR Bologna ;Pirrotta, C.; Università di Catania ;Polonia, A.; CNR-ISMAR Bologna ;Boschi, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia; ; ; ; ; ; ; ; Twelve anomalous layers, marked by a high concentration of displaced epiphytic foraminifera (species growing in vegetated substrates like the Posidonia oceanica) and subtle grain-size changes were found in a 6.7 mlong, fine sediment core (MS-06), sampled 2 kmoff the shore of the Augusta Harbor (Eastern Sicily) at a depth of 72 m, recording the past 4500 yrs of deposition. Because concentrations of epiphytic foraminifera are quite common in infralittoral zones, but not expected at −72 m, we believe that these anomalous layers might be related to the occurrence of tsunamis causing substantial uprooting and seaward displacement of P. oceanica blades with their benthic biota. Our approach involved the study of geophysical data (morphobathymetry, seismic reflection, and seafloor reflectivity) and sediment samples, including X-ray imaging, physical properties, isotopic dating, tephrochronology, grain-size and micropaleontology. Correlations between anomalous layers and tsunami events have been supported by a multivariate analysis on benthic foraminifera assemblage and dates of historical tsunami records. We found that four out of the eleven layers were embedded in age intervals encompassing the dates of major tsunamis that hit eastern Sicily (1908, 1693, and 1169) and the broader Eastern Mediterranean (Santorini at about BP 3600). One more layer, even if less distinct than the others, was also defined and may be the evidence for the AD 365 Crete tsunami.229 715 - PublicationRestrictedMiddle Pleistocene vertebrate-bearing fluvial deposits of the Ceriti Mts area, Latium coast (central Italy)(2006-06)
; ; ; ; ; ; ; ; ; ; ;Mancini, M.; CNR, Istituto di Geologia Ambientale e Geoingegneria ;Palombo, M. R.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Petronio, C.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Sardella, R.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Bedetti, C.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Bellucci, L.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Di Canzio, E.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Giovinazzo, C.; Università di Roma "La Sapienza", Dipartimento di Scienze della Terra ;Petrucci, M.; Università degli Studi di Torino ;Trucco, F.; Soprintendenza Archeologica per l'Etruria meridionale; ; ; ; ; ; ; ; ; It is here presented a Middle Pleistocene fossiliferous site, the Cerveteri Monte Li Pozzi (CMLP) site, located in the Ceriti Mts area, within the wider Roman Basin (Latium coast, central Italy). The outcropping succession is, from base to top, composed of terrigenous and carbonate fluvial deposits, travertines and ~ 410 ka old pyroclastites. The fluvial deposits form an aggradational river terrace, belong to an ancient risen alluvial-coastal plain and sedimented close to the palaeocoast. Two fossiliferous levels have been discovered inside: the lower level, where Elephas (Palaeoloxodon) antiquus and Axis sp. ? A. eurygonos were found; the upper level with E. antiquus, Stephanorhinus cf. S. hundsheimensis, Dama cf. D. clactoniana, Arvicola mosbachensis, Testudo sp.. The faunal assemblage as a whole indicates the middle-late Galerian Mammal Age, approximately 600-500 ka, and may be correlated with the MIS 15 or MIS 13. This fossil assemblage is the first discovery of Galerian fauna in the Ceriti Mts area and thus represents a new Local Fauna. On the basis of lithostratigraphic, biochronologic and elevation data, it is possible to estimate an approximately 0.26 mm/a uplift rate in the Ceriti Mts basin.203 27