1,721,234 research outputs found
Lithofacies and lithofacies architecture analyses in the study of pyroclastic density current deposits
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Le sottopopolazioni granulometriche nei depositi vulcanici di caduta: l’eruzione delle Pomici di Avellino (Vesuvio, Italia)
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A LATE-PLEISTOCENE PHASE OF SAHARAN DUST DEPOSITION IN THE HIGH APENNINE MOUNTAINS (ITALY)
No full textVariability of eruption dynamic during a subplinian event: the Greenish Pumice of Somma-Vesuvius (Italy)
No full textThe city of Napoli and its active volcanoes
Full text linkSomma-Vesuvius and Campi Flegrei are among the most famous active volcanoes in the world and are part of the Neapolitan landscape. The activity of the volcanoes punctuated the human history since Bronze Age, as testified by archaeological finds recognised in the plain and relieves surrounding the volcanic area. The world-famous eruption of AD 79 consigned the Somma-Vesuvius to the history, because of the burying of some important roman tows like Pompeii and Herculaneum. The field trip dedicated to Somma-Vesuvius illustrates the volcanology of main historical eruptions, with special emphasis to the activity of the last 4000 years. The visit to the summit cone provides a panoramic view of the inner caldera wall. Deposits of the Plinian and subplinian eruptions can be observed in old quarries around the volcano. The AD 79 deposits are exposed in both quarries and archaeological excavations such Herculaneum and Oplontis, in which the interaction of the pyroclastic deposits with an inhabited area will be the argument for discussion about the present day volcanic hazard and risk in the Neapolitan area. A visit to the hystorical site of the Osservatorio Vesuviano will be the occasion to illustrate the born and the history of volcanic surveillance. The itinerary in the Campi Flegrei caldera, provides asn overview of i) the deposits of the Campanian Ignimbrite and Neapolitan Yellow Tuff caldera forming eruptions, ii) the pyroclastic density currents and fallout deposits of the post caldera volcanism, iii) different preserved volcano edifices and volcano tectonic structures, along with fumarolic and hydrothermal active field are hosted. A visit to the remnants of the Serapeum Roman market and the Pozzuoli harbour, are the best examples to discuss of caldera unrest at Campi Flegrei. The several diverse monitoring stations site at Solfatara and a visit to the Monitoring Centre of the Osservatorio Vesuviano provide an opportunity to illustrate the surveillance network of the INGV-OV for the Neapolitan volcanoes and discuss on the future eruption scenario and the related risk
Geological data in volcanology: Collection, organisation and applications
No full textThis special issue aims to highlight and strengthen the role of geology in modern volcanology, which has grown turbulently in recent years, especially in the field of numerical modelling. Indeed, volcanology is today a modern, inter- and multi-disciplinary science, which qualitatively and quantitatively describe long and short term volcanic processes, their hazards and impacts on society and the environment. At the same time, the rapid increase of mathematical and computational modelling tools has reduced the perceived value of geology, despite it remains the unavoidable witness of past volcanic processes, and against which any model and theory has to face with. To promote the importance of volcano geology a commission of IAVCEI was recently (2015) established, and named IAVCEI Commission on Volcano Geology (VGC). The VCG supports the organisation of workshops, field trips, and scientific sessions at the major international conferences, promotes widely applicable guidelines for field geological mapping, as well as stimulates discussions and exchange of information among researchers on topics related to field data collection and organisation in volcanology. For these reasons this issue is under the aegis of the VGC
The influence of variable topography on the depositional behaviour of pyroclastic density currents: the examples of the Upper Pollara eruption (Salina Island, southern Italy)
No full textDeposition temperature of some PDC deposits from the 1982 eruption of El Chichón volcano (Chiapas, Mexico) inferred from rock-magnetic data
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