New very high resolution seismic surveys in shallow water to study
the subsurface in the Venice Lagoon
G. Brancolini, F. Donda, L. Baradello, D. Nieto, F. Fanzutti, N. Wardell
Dept. Geophysics of the Lithosphere, Istituto Nazionale di Oceanografia e
Geofisica Sperimentale, Trieste, Italy
L. Tosi, F. Rizzettoi, M. Bonardi
Istituto per lo Studio della Dinamica delle Grandi Masse, CNR, Venezia,
Italy
P. Teatini,
Dept. Mathematical Methods and Models for Scientific
Applications, University of Padova, Padova, Italy
C. Amos
Southampton Oceanography Center, Southampton, UK
ABSTRACT
In order to provide new geological knowledge on the Venetian architecture
subsoil, within the Co.R .La. Project, a VHR seismic system has been adapted
for very shallow water, i.e. 1-2 m depth, and is currently under installat
on a dedicated boat. Preliminary surveys have been carried out with this
new technique in the lagoon, sea and Sile River. This paper reports and
discusses these results and focuses on the characterization of the three
main seismic units detected, which relate to the upper Pleistocene Low System
Tract (LST), the Holocene Transgressive System Tract (TST), and the Holocene
High System Tract (HST). In particular, the target of the investigation was
the recognition within these units of features, such as filled paleo-river
beds and lagoon channels, ancient littoral ridges and beach rock formations.
