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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2017-135
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
 
18 Dec 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).
Thickness of marine Holocene sediment in the Gulf of Trieste (Northern Adriatic Sea)
Ana Trobec1, Martina Busetti2, Fabrizio Zgur2, Luca Baradello2, Alberto Babich2,3, Andrea Cova2, Emiliano Gordini2, Roberto Romeo2, Isabella Tomini2, Sašo Poglajen4, Paolo Diviacco2, and Marko Vrabec1 1University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Geology, Privoz 11, 1000 Ljubljana, Slovenia
2OGS – Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy
3Università di Trieste, Dipartimento di Matematica e Geoscienze, Via Weiss 2, 34127 Trieste, Italy
4Harpha Sea d.o.o., Čevljarska ulica 8, 6000 Koper, Slovenia
Abstract. We use various geophysical datasets (multibeam and singlebeam echosounder data, sub-bottom profiling Chirp and sonar data and very high resolution boomer seismic data) along with published sedimentological data and depth data from nautical charts in order to create models of the depth of the seafloor and the base of Holocene marine sediment in the Gulf of Trieste. The two models are later used in order to calculate the thickness of marine Holocene sediment which has been depositing on the Late Pleistocene alluvial plain since the Holocene transgression in the Italian and Slovenian part of the gulf. Thicker Holocene marine sedimentary sequences averaging at around 5 meters are characteristic for the SE part of the gulf. In other parts of the gulf the Holocene marine sedimentary cover is very thin or even absent, except in close proximity of the shoreline and fluvial sediment sources, in the area of the Trezza Grande paleodelta and above topographic depressions of the Late Pleistocene base. The presented datasets available from the OGS SNAP data repository (https://doi.org/10.6092/6ad9b1e6-c977-cec9-8a2d-db10c7f90adc) represent a valuable reference for a wide variety of research disciplines dealing with the dynamic Earth system in the Gulf of Trieste and could use as a valuable tool for designing sampling and geophysical campaigns in the studied area.
Citation: Trobec, A., Busetti, M., Zgur, F., Baradello, L., Babich, A., Cova, A., Gordini, E., Romeo, R., Tomini, I., Poglajen, S., Diviacco, P., and Vrabec, M.: Thickness of marine Holocene sediment in the Gulf of Trieste (Northern Adriatic Sea), Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2017-135, in review, 2017.
Ana Trobec et al.
Ana Trobec et al.

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Models of the bathymetry, of the base and of the thickness of Holocene marine sediment in the Gulf of Trieste (Northern Adriatic Sea) A. Trobec and M. Busetti https://doi.org/10.6092/6ad9b1e6-c977-cec9-8a2d-db10c7f90adc
Ana Trobec et al.

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Short summary
Following the last glacial period the sea-level started rising rapidly. The sea started entering the Gulf of Trieste approximately 10 000 years ago and since then marine Holocene sediment has been depositing. We wanted to understand how thick this sediment is, so we used modern scientific equipment which let us determine the depth the seafloor and the sediment below. The sediment is thickest in the SE part of the gulf (approx. 5 m). In the other parts it is very thin except near the coast.
Following the last glacial period the sea-level started rising rapidly. The sea started entering...
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