GNGTS 2013 - Atti del 32° Convegno Nazionale

toe of the submerged cliffs at Vivara is located at a variable depth and is covered by detritic and sandy deposits (Ispra, 2011). Several circular bays rimming the Procida Island give to the island an articulated coastal morphology. These bays coincide with the relicts of the volcanic edifices, whose shapes prolong, in some cases, below the sea level, partially or totally eroded by the wave motion. Their absence in a submarine environment is related also to structural causes, as in the Vivara and Terra Murata cases, where normal faulting has controlled the disarticulation of the volcanic rims or to the sedimentary infill, as in the case of Solchiaro. Proceeding seawards from the coastal sector of the Chiaiolella beach, starting from a water depth of 40 m up to 20 m, it has been observed the occurrence of steep slopes having a semi- circular trending, related to the volcanic structure of “I Ruommoli” (Aiello et al. , 2012), whose rim, now completely submerged, is still visible. The general structural setting of the Procida Island is however controlled by numerous volcano-tectonic collapses, also coeval to the formation of several volcanic edifices. NNE-SSW to NE-SW trending structural lineaments seem to prevail at the sea bottom, controlled by the regional tectonic setting of the eastern Tyrrhenian margin. References Aiello G., Budillon F., Cristofalo G., D’Argenio B., de Alteriis G., De Lauro M., Ferraro L., Marsella E., Pelosi N., Sacchi M. and Tonielli R.; 2001: Marine geology and morpho-bathymetry in the Bay of Naples . In: Faranda F.M., Guglielmo L. and Spezie G. (Eds.) Structures and Processes of the Mediterranean Ecosystems , Springer-Verlag Italy, Chapter 1, pp. 1-8. Aiello G., Angelino A., Marsella E., Ruggieri S. and Siniscalchi A.; (2004): Carta magnetica di alta risoluzione del Golfo di Napoli (Tirreno meridionale). Boll. Soc. Geol. Ital., 123 : pp. 333-342. Aiello G., Angelino A., D’Argenio B., Marsella E., Pelosi N., Ruggieri S. and Siniscalchi A.; (2005): Buried volcanic structures in the Gulf of Naples (southern Tyrrhenian sea, Italy) resulting from high resolution magnetic survey and seismic profiling. Annals of Geophysics, 48 : pp. 1-15. Aiello G., Marsella E. and Passaro S.; (2012): Stratigraphic and structural setting of the Ischia volcanic complex (Naples Bay, southern Italy) revealed by submarine seismic reflection data. Rendiconti Lincei, 23 (4) : pp. 387-408. Catalano R. et al. (1996): Linee guida alla cartografia geologica marina, scala 1:50.000. Gruppo di Lavoro del Servizio Geologico Nazionale, Bozza n. 1. Chappell J. and Shackleton N.J.; (1986): Oxygen isotopes and sea level. Nature, 324 : pp. 137-140. Cinque A., Aucelli P.P.C., Brancaccio L., Mele R., Milia A., Robustelli G., Romano P., Russo F., Russo M., Santangelo N. and Sgambati D. (1997) Volcanism, tectonics and recent geomorphological change in the Bay of Napoli. Suppl. Geogr. Fis. Dinam. Quat., III, T2, 123-141. D’Argenio B., Aiello G. et al. ; (2004): Digital elevation model of the Naples Bay and adjacent areas, Eastern Tyrrhenian sea. In: Atlante di Cartografia Geologica scala 1:50.000 (progetto CARG), Servizio Geologico d’Italia, 32 nd International Congress “Firenze 2004”, Editore De Agostini, Italy. De Muro S. and Orrù P.; (1999): Il contributo delle beach rock nello studio della risalita del mare olocenico. Le beach-rock post-glaciali della Sardegna nord-orientale. Il Quaternario, 11: pp. 19-39. Di Fiore V., Aiello G. and D’Argenio B.; (2011): Gravity instabilities in the Dohrn canyon (Bay of Naples, southern Tyrrhenian sea): potential wave and tsunami (run-up) reconstruction from a fossil submarine landslide. Geologica Carpathica, 62 (1): pp. 55-63. Fabbri A., Argnani A., Bortoluzzi G., Correggiari A., Gamberi F., Ligi M., Marani M., Penitenti D., Roveri M. and Trincardi F.; (2002): Carta geologica dei mari italiani alla scala 1:250.000. Guida al rilevamento. Presidenza del Consiglio dei Ministri, Dipartimento per i Servizi Tecnici Nazionali, Servizio Geologico, Quaderni Serie III, volume 8. Ispra (2011) Carta geologica scala 1:10.000 – Isola di Procida. Regione Campania, Settore Difesa Suolo, Systemcart, Roma, Italy. Kelletat D. (2006): Beach rock as sea level indicator? Remarks from a geomorphological point of view. Journal of Coastal Res., 22 (6): pp. 1558-1564. Peres J.M. and Picard J.; (1964): Noveau manuel de bionomie benthique de la Mer Mediterranee. Extrait du Recueil des Travaux de la Station Marine d’Endoume, 31 (47) :, pp. 137. Perrotta A., Scarpati C., Luongo G. and Morra V.; (2010): Stratigraphy and volcanological evolution of Campi Flegrei and Procida island, Italy. In : Stratigraphy and Geology of Volcanic Areas, Geological Society of America Special Papers, 464 : pp. 185-189. Putignano M.L., Cinque A., Lozej A. and Moccheggiani Carpano C.; (2009) Late Holocene ground movements in the Phlegrean Volcanic District (Southern Italy): new geoarchaeological evidence from the islands of Vivara and Procida. Méditerranée, 112 : pp. 43-50. 180 GNGTS 2013 S essione 3.3