1,721,618 research outputs found
Syn-eruptive crystallization during a subplinian event: the Greenish Pumice Eruption of Somma-Vesuvius (Italy)
No full textThe comenditic ignimbrites and lavas of San Pietro Island (Sardinia, Italy): inferences on degassing and evolution of peralkaline magmas from melt inclusions
No full textLe sottopopolazioni granulometriche nei depositi vulcanici di caduta: l’eruzione delle Pomici di Avellino (Vesuvio, Italia)
No full textEvoluzione della fase fluida in una camera magmatica peralcalina: un esempio dall’Isola di San Pietro (Sardegna, Italia)
No full textPre-eruptive degassing in a peralkaline magma chamber (S.Pietro Island, Sardinia, Italy)
No full textBubble growth during subplinian events: the Greenish Pumice Eruption of Somma-Vesuvius (Italy).
No full textDEFORMATIONAL FEATURES OF CRYSTAL-RICH RHYOLITIC LAVA FLOWS FROM S. PIETRO ISLAND (ITALY)
No full textEmplacement dynamics od silicic lava flows: evidence from deformational patterns of comendite lava flows from San Pietro island (Sardinia, Italy)
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Apulian Bronze Age pottery as a long distance indicator of the Avellino pumice eruption (Vesuvius, Italy)
No full textDuring the Bronze Age, Vesuvius had a Plinian eruption whose deposits are known as the Avellino Pumice. The eruption spread a blanket of white and grey pumice across southern Italy, and there was a severe impact on proximal areas. Assessment of votcanological factors for the Plinian phase gives intensities of 5.7 x 107 kg s-~ for the white pumice phase and 1.7 x l0s kgs-1 for the grey pumice phase, corresponding to column heights of 23 and 31kin, respectively. Volume (magnitude) calculations using the crystal concentration method (CCM) give respectively 0.32 and 1.25km3 of deposit, in a total minimum period of about 3h. Archaeometric studies on Bronze Age domestic pottery from several settlements in Apulia (SE Italy) reveal the presence of pumice fragments mixed with the clay, and petrological and chemical criteria suggest that these pumices are from the Avellino eruption. This relationship allows us to fix precise correlations between different archaeological facies of the italian Bronze Age. To explore the possibility of an extensive use of pumices in these distal regions (about 140km from Vesuvius), we calculated the possible thickness of the tephra blanket. We propose a method to extrapolate proximal data on the deposit to calculate its minimum distal thickness. Such a method could also be used in volcanic hazard studies to assess the distal impact of large past eruptions
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