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| Pomici di Base | |
|---|---|
| Name | Pomici di Base |
| Location | Campania, Italy |
| Type | tuff cone |
Pomici di Base is a geological deposit and volcanic feature located in Campania, Italy, notable for its widespread pumice and pyroclastic products. It is associated with the volcanism of the Phlegrean Fields, Campi Flegrei caldera system and the broader volcanic province that includes Mount Vesuvius, Ischia, and the Tuscany volcanic region. The deposit has been the subject of stratigraphic, petrological, and archaeological studies linking it to eruptions that influenced settlement patterns around Naples, Pozzuoli, and Cumae.
The name derives from Italian usage in the context of volcanic lithology and local toponymy tied to Campania and Naples provincial nomenclature; it appears in stratigraphic literature alongside regional terms linked to the Phlegrean Fields and classical sites such as Pompeii and Herculaneum. Historical mapping by institutions like the Istituto Nazionale di Geofisica e Vulcanologia and surveys by researchers from the University of Naples Federico II and the National Research Council (Italy) codified the name in geoscientific reports. The toponym reflects both lithic character familiar to quarrymen and the labeling conventions used in eruptive unit schemes by teams from INGV and international collaborators including scientists from University College London and the Max Planck Institute.
Pomici di Base is recorded within stratigraphic frameworks that include units from the Campanian Ignimbrite sequence and intercalated pyroclastic deposits identified in cores and outcrops examined by researchers affiliated with ETH Zurich, Università degli Studi di Milano, and the University of Oxford. Petrographic studies show textures and mineral assemblages comparable to products from eruptions studied by teams at the Smithsonian Institution’s Global Volcanism Program and analytic facilities at Institut de Physique du Globe de Paris. Chemical characterization via electron microprobe and mass spectrometry by laboratories at Scripps Institution of Oceanography and Lamont–Doherty Earth Observatory reveal major- and trace-element signatures similar to rhyolitic to dacitic magmas recognized at Vesuvius and other Mediterranean volcanic centers such as Santorini and Lipari. Isotopic studies by groups from ETH Zurich and University of Cambridge compare radiogenic ratios used in correlation with deposits linked to events documented by Pliny the Younger and correlated to tephrochronological markers used by researchers at the British Geological Survey.
The deposit exhibits a stratified morphology visible in quarries and coastal exposures near Pozzuoli, Baia and along the Gulf of Naples. Field mapping by teams from the Istituto Geografico Militare and university field parties indicates lateral continuity across plains and paleoshorelines, connecting exposures near Monte di Procida and Capo Miseno. Distribution studies conducted with satellite imagery from European Space Agency platforms and airborne LiDAR surveys executed in collaboration with Italian Space Agency show thickness variations, vesicular pumice layers, and welded horizons analogous to sequences described for deposits at Syracuse and Catania. Borehole logs held by the Servizio Geologico d'Italia document subsurface extents overlapping archaeological strata excavated by the Superintendency for Archaeological Heritage of Naples and Pompeii.
The unit formed during explosive eruptive phases within the context of caldera dynamics driven by magmatic processes documented in models developed at Caltech and Massachusetts Institute of Technology. Tephra dispersal patterns reconstructed by computational groups at University College London and Imperial College London reflect wind fields and pyroclastic density current behavior similar to events investigated at Mount St. Helens and Krakatoa. Regional tectonic control involving the Tyrrhenian Sea opening and subduction processes beneath the Apennines frames the magmatic evolution described in syntheses by researchers at the University of Rome La Sapienza and the National Institute of Geophysics and Volcanology (Italy). Correlation to regional eruptive chronologies includes comparisons with sequences at Ischia and stratigraphies established for Mount Vesuvius eruptions historically recorded in accounts by Pliny the Elder.
Physically, the deposit comprises highly vesicular pumice clasts, ash matrices, and lithic fragments showing variable welding and compaction, comparable to materials analyzed at Los Alamos National Laboratory and petrographic labs at University of Padua. Chemical datasets document silica enrichment, alkali contents, and trace-element patterns evaluated with standards maintained by Geological Survey of Japan and trace analysis centers at University of California, Berkeley. Mineral phases commonly identified include quartz, sanidine, plagioclase, biotite, and magnetite, consistent with mineral assemblages reported in studies from Vrije Universiteit Amsterdam and Friedrich Schiller University Jena. Physical parameters such as bulk density, porosity, and thermal properties have been measured in experiments undertaken by engineering groups at the Politecnico di Milano and correlated with material behavior under load in research at ETH Zurich.
Locally quarried pumice and tuffous materials have been used historically in construction and sculpture in Naples, Pompeii, Herculaneum, and ecclesiastical architecture associated with Vatican City projects documented by conservation teams from the Getty Conservation Institute and the European Cultural Heritage Agency. Archaeological contexts tie the deposit to building phases at sites managed by the Superintendence of Archaeology, while conservation science projects by the British Museum and Museo Archeologico Nazionale di Napoli examine deterioration and stabilization methods. Industrial applications mirror uses of pumice in Germany and Spain for abrasives and horticulture, with material supply chains studied by economists at University of Bologna and manufacturing research groups at CNR.
Preservation of outcrops and quarries falls under regional planning authorities including the Campania Region and cultural heritage agencies such as the Ministry of Cultural Heritage and Activities (Italy). Geohazard assessments by INGV and hazard modelers at University of Bristol address stability of pumice deposits, erosion, and secondary hazards analogous to those analyzed after eruptions at Eyjafjallajökull and Pinatubo. Risk communication efforts coordinate with municipal authorities in Naples and civil protection agencies like the Dipartimento della Protezione Civile to mitigate impacts on infrastructure and archaeological sites.
Category:Volcanic deposits Category:Geology of Campania