GNGTS 2013 - Atti del 32° Convegno Nazionale

hemipelagic sedimentation deposited during the last stages of a sea level rising or during sea level highstands. Discontinuous, more or less parallel reflectors often indicate mud turbidites deposited during a sea level rising, onlapping or draping depending on geological conditions. Acoustically transparent reflectors vary according to geological setting and sediment type and generally indicate silty-mud turbidites, debris flow deposits and small slumps and finally, channel fill deposits restricted within associated levees or structural walls. Unorganized chaotic reflectors indicate slump masses and possibly high density debris flow deposits, often onlapping but sometimes unconfined. Broken wavy seismic reflectors are typical of slump masses or sediment creep. Acoustical voids, characterized by an inverted U shape are usually acoustically transparent and occurring in the shallow subbottom and are interpreted as gas- charged sediments. High resolution seismic stratigraphy in the Gulf of Pozzuoli. The seismic profile L68_07 (Fig. 3), running from the western continental shelf of Pozzuoli Gulf and Nisida island Fig. 3 – Seismic profile L68_7 and corresponding geologic interpretation (modified after Aiello et al. , 2012). Note the occurrence of a wide antiformal structure, composed of the Punta Pennata and Nisida anticlines, distinguishing respectively the western and eastern continental shelves of the Gulf of Pozzuoli and the central syncline of the Gulf of Pozzuoli. Volcanic dykes, characterized by sub-vertical, acoustically-transparent and locally bounded by normal faults have been identified through seismic interpretation.. 8 GNGTS 2013 S essione 3.1