Microsoft Word - 11_Furlani + Revisori_LM05.doc Available online http:/amq.aiqua.it ISSN (print): 2279-7327, ISSN (online): 2279-7335 Alpine and Mediterranean Quaternary, 25 (2), 2012, vii-ix The Geoswim project: snorkel-surveying along 250 kilometres of the Southern and Western Istrian Coast Stefano Furlani Department of Mathematics and Geosciences, University of Trieste, Italy Corresponding author: S. Furlani The northeastern Adriatic coast is dominated by high limestone plunging cliffs or slopes at wide-ranging angles. Several Authors (Fouache et al., 2000, Antonioli et al., 2004, 2007; Furlani et al., 2011a) reported the occurrence of a well-carved submerged tidal notch at about -0.5/-0.7 m m.s.l. in the central part of the Istrian peninsula, in correspondence of the Limski Kanal. Moreover, Furlani et al. (2011b) studied the coastal fea- tures of the northwestern sector, in particular the gene- sis and development of shore grykes. Anyway, observa- tion carried out along these rocky coasts, but also in general along all the rocky coasts of the world, are punctual and relative to short coastal sectors. As a con- sequence, it prevents the possibility to provide a global view of the surveyed coastal area. The Geoswim project, of the Department of Math- ematics and Geosciences of the University of Trieste, allowed to survey the morphological features of the whole southern and western Istrian coast (Fig. 1), like notches, sea caves, coastal assemblages of pinnacles, potholes, etc., and to collect physical parameters during the surveying. The northwestern Istrian coast is dominated by limestones spanning in time spanning in time from the Late Jurassic to the Eocene (Velić et al., 2002, ). Nearly horizontal or slightly inclined limestone bedding planes outcrop all over the western Istria. Limestone beds thickness is higher in correspondence of the Limski Kanal, in the central and most ancient part of Istria (Vlahović et al., 2005). n Departur Arrival km 1 Sisan Liznijan 6 2 Liznijan Kamp Medulin 11 3 Kamp Medulin Pomer 8 4 Pomer Kamp Stupice 8 5 Kamp Stupice Premantura 14 6 Premantura Banjole 11 7 Banjole Stoja 12 8 Stoja Pula 9 9 Pula Peroj 8 10 Peroj Bale 13 11 Bale Rovinj South 8 12 Rovinj South Rovinj North 10 13 Rovinj North Valalta 7 14 Koversada Zelena Laguna 11 15 Zelena Laguna Porec 7 16 Porec Cervar 13 17 Cervar Mirna 9 18 Mirna Novigrad 6 19 Novigrad Daila 8 20 Daila Sv. Pelegrin 7 21 Sv. Pelegrin Umag 8 22 Umag Savudrija 9 23 Savudrija Kanegra 7 24 Kanegra Strunijan 8 25 Strunijan Koper 12 26 Koper San Bartolomeo 6 26 San Bartolomeo Trieste 12 Total lenght 250,17 Fig. 1 - Left side: the study area. Red and green lines are the laps. Right side: the route and the length of the laps. Furlani S. viii From a geomorphological point of view, the study area can be classified as a Dalmatian coast (Holmes, 1965). high plunging cliffs dominate the Southwestern and the central part of the Western Istria, while the northern and southern coast is interested by limestone coastal slopes plunging at wide-ranging angles. The surveying was carried out along 260 km of coast during July 2012 using mask and fins. It can be considered a snorkeling surveying. The route was cov- ered in 27 days (Tab. 1), from Šišan, in Croatia, to Tri- este, in Italy. Two cameras, located on a 1.2 m boat spe- cifically adapted for the project (Fig. 2a, b), a CANON G12 set in an underwater housing and the latter a 3D GoPro camera, allowed to collect an ongoing video of large part of the Istrian coast, both above and below sea level. Moreover, a CTD-diver produced by Eijkelkamp was pull in order to collect temperature and conducibility data along the coast. Data collected, together with the video acquisition, allowed to accurately map the submerged notch and other coastal features, such as sea caves (Fig. 3), pot- holes, etc, along the whole surveyed coast. Data show that the submerged notch is confined to the central part of the Istrian peninsula (Fig. 4), the area where it was previously pointed out. The preliminary processing of physical data, even if they was strongly affected by the total lacking of rains during the surveying period, seem to indicate the occurrence of few large submarine springs in the same area of the occurrence of the sub- merged notch. Future processing of recorded data and their mu- tual comparison will allow to precisely define the occur- rence of limestone coastal features and their relations to coastal topography and physical seawater parameters. Acknowledgements My acknowledgements go to many people who ac- Fig. 2 - a) Preparation of the boat used during the surveying in southern Istria (Photo E. Zavagno); b) surveying of coastal features and physical parameters of the sea near Poreč (Croatia). Fig. 4 - Submerged tidal notch along the Northeastern Adriatic coast. The picture is made as a stereoscopic 3D as the results using filters of different colors, in this case red and cyan. Red and cyan glasses are recommended to correctly view this im- age. Fig. 3 - A sea cave at Premantura (Croatia), in the southern sector of the Istrian peninsula. The Geoswim project: snorkel-surveying along Istrian Coast   ix tively participated at different stages of the scientific pro- ject, in particular prof. Franco Cucchi of the Department of Mathematics and Geosciences of the University of Trieste for the ongoing support, Rados Furlani for the assistance in the assemblage of the boat, Sara Biolchi, Livio Dorigo, Giulio Guglielmi, Gaia Cusatelli, Federico Furlani, Roberto Odorico, Luca Terribili, Martina Zaccar- iotto and Enrico Zavagno for the assistance during the swim-survey operations and many others. Many thanks to the “Riserva Marina di Miramare”, the “Circolo Istria” and the “Istituto Nautico di Trieste” for the assistance before and after the survey. REFERENCES Antonioli F., Carulli G.B., Furlani S., Auriemma R., Ma- rocco R. (2004) - The enigma of submerged ma- rine notches in northern Adriatic Sea. Quaternaria, 8, 27-36. Antonioli F., Anzidei M., Lambeck K., Auriemma R., Gaddi D., Furlani S., Orrù P., Solinas E., Gaspari A., Karinja S., Kovacic´ V., Surace L. (2007) - Sea level change during Holocene from Sardinia and northeastern Adriatic (Central Mediterranean sea) from archaeological and geomorphological data. Quaternary Science Reviews, 26, 2463-24. Faivre S., Fouache E., Ghilardi M., Antonioli F., Furlani S., Kovačić V. (2011) - Relative sea level change in Istria (Croatia) during the last 5 ka. Quaternary International, 232, 132-143. Fouache E., Faivre S., Dufaure J-J., Kovačić V., Tas- saux F. (2000) - New observations on the evolu- tion of the Croatian shoreline between Poreč and Zadar over the past 2000 years. Zeitschrift für Ge- omorphologie Suppl.-Bd. 122, 33-46. Furlani S., Chersicla D., Bressan G., Biolchi S., Cucchi F. (2011) - Shore grykes along the Western Istrian coast. Acta Carsologica, 40/1, 29-42. Furlani S., Cucchi F., Biolchi S. & Odorico R. (2011b) - Notches in the Northern Adriatic Sea: genesis and development. Quaternary International, 232, 158-168. Furlani S., Cucchi F., Biolchi S. (in press) - Late Holo- cene widening of karst voids by marine processes in partially submerged coastal caves (Northeastern Adriatic). Geografia Fisica e Dinamica Quater- naria. In press. Holmes A. (1965) - Principles of Physical Geology. New York, Ronald Press. Velić, I., Vlahović, J., Matičec, D. (2002) - Depositional sequences and palaeogeography of the adriatic carbonate platform. Società Geologica Italiana, Memorie, 57, 141-151. Vlahović, I., Tisljar, J., Velić, I., Matičec, D. (2005) - Evo- lution of the Adriatic carbonate platform: paleoge- ography, main events and depositional dynamics. Palaeogeography, Palaeoclimatology, Palaeoe- cology, 220, 333-360. 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