6

Parallel reflectors having a high amplitude and continuity

Upper unit, widely occurring at the sea bottom and in the subsurface of the Gulf of Naples

Holocene marine deposits

5c

Acoustically-transparent

Unit with a wedge-shaped external geometry occurring in the NW sector of the basin

Volcanic and volcaniclastic deposits of the Neapolitan Yellow Tuff erupted from the Phlegrean Fields about 12 ky ago

5b

Acoustically-transparent

Unit with irregular external geometry occurring in the western part of the basin (offshore of the Ischia and Procida islands and Phlegrean Fields)

Volcanic and volcaniclastic deposits erupted from the volcanic complexes of Ischia and Procida (55 - 18 ky B.P.)

Volcanic units of the Pentapalummo, Nisida and Miseno banks

5a

Acoustically-transparent

Unit with a wedge-shaped external geometry, thinning seawards and overlying inclined paleomorphologies; it occurs in the eastern sector of the basin

Volcanic and volcaniclastic deposits erupted from the volcanic complexes of the Phlegrean Fields and of the Somma-Vesuvius. It includes the unit of the Campanian Ignimbrite erupted about 35 ky B.P.

4

Clinoforms with sigmoidal configurations having high amplitude and continuity, overlying in downlap the C unconformity

Third sedimentary unit in the basin filling; Prograding wedge with well preservedpaleo-rims, thickening towards the slope areas; It laterally grades into the volcanic units 5a, 5b, 5c and or into volcanic domes; It is deeply incised by canyoning along the Magnaghi and Dohrn canyon axes, giving origin to relict morphologies in the central part of the basin.

Relict Late Pleistocene prograding wedge

3

Clinoforms with sigmoidal obliquous configurations, having a high continuity and amplitude, onlapping the B unconformity

Second sedimentary unit in the basin fill; Transgressive unit with a wedge-shaped external geometry, developed in slope and platform areas; occurrence of local domes and/or volcanic necks

Marine siliciclastic deposits, Pleistocenic in age, located in the central part of the basin

2

Alternating intervals characterized by obliquous-parallel reflectors having high amplitude and continuity and by transparent intervals.

First sedimentary unit in the basin fill; dipping prograding wedge inclined towards NW with eroded topsets and preserved clinoforms

Marine siliciclastic deposits of the Early Pleistocene (alternating depositional cycles of sands and shales), located in the area surrounding the Sorrento Peninsula and the Capri island; involved by a tectonic tilting together with Meso-Cenozoic carbonates

1

Chaotic

Basal unit; acoustic basement; NW dipping monoclinalic structure

Meso-Cenozoic carbonates cropping out in the Sorrento Peninsula and in the Capri island