GEOLOGICAL SURVEY OF THE EXTREMELY SHALLOW AREA OF THE ISLAND OF PAG BRANKO PETRIČ BRANKO PETRI EVI

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GEOLOGICAL SURVEY OF THE EXTREMELY SHALLOW AREA OF THE ISLAND OF PAG BRANKO PETRIČEVIĆ and ZVONKO GRŽETIĆ Hydrographic Institute of the Republic of

survey district areas; operations, 37 geological Total surface of 321 442.

an average during the survey, as well as the depth of 1 metre; result of penetration into the seabed that, despite small depth, Use of machinery for

1 GEOLOGICAL SURVEY OF THE EXTREMELY SHALLOW AREA OF THE ISLAND OF PAG BRANKO PETRIČEVIĆ and ZVONKO GRŽETIĆ Hydrographic Institute of the Republic of Croatia, Split Zrinsko Frankopanska 161 SUMMARY - Ex Exploring the area of the island of Pag Geological survey of three During two days of survey district areas; operations, 37 geological Total surface of m²; profiles were made; Sea areas interconnected by low The presentation are discussing small bridges; the problems encountered Shallow area with an average during the survey, as well as the depth of 1 metre; result of penetration into the seabed that, despite small depth, Use of machinery for drilling a great number of multiples, was out of question; and the presence of the sponge Using of small boat; seaweed on the bottom did Equipped boat was manually attain the maximum transferred; penetration of 13 to 17 metres 1

2 Like multiple croissants; Paška vrata gate; Strong wind area; Access to the port of Pag is to some extent difficult PROJECT: - Constructing an artificial waterway that would connect the bay of Pag to the bay of Košljun; - Waterway Town of Pag Košljun 2

3 Picture of the town Pag PAG SALT WORKS 3.ZONA 2.ZONA 1.ZONA 1. ; 2. ; 3. B ; ; VERSION 1 Between stone bridge and salt storage (old); VERSION 2 On the existing beach side; VERSION 3 In existing channel route (bridge); 3

4 Geologicaly: -Hills around Pag are older than fluvial valley (geological age) - Before lend! - After lakes! - Finally artificial waterway! Area of survey aerofotogrametri picture & grid 4

5 Area of survey bathimetry & isolines Area of survey geology line and sampling points by drop & piston corer 5

6 The major problem was that the research boat could not sail from one aquatic area to another and thus had to be transported along with all of the equipment, because it could not pass under the bridges as they were too low! An aerial photograph made during the aerophotogrametric measurement of the island of Pag was used as a base. Because of the shallowness of the aquatic area, underwater plants are clearly visible. These, as was determined by the final analysis, attenuate the VF signal. The plants on the sea bottom, which are dark blue in colour on the photograph, have a texture of a sponge. 6

7 View of the geological profile (line Basin3_1.txt) and the position of sampling with Piston Corer (P2) Two thirds of the recording of the geological profile Basin3_1.txt 7

8 PISTON CORER 0 to 0.32 m 0.32 to 3.0 m 3.0 to 6.0 m Mud, dark gray to black colour with shell fragments, soft consistent Silt clayey, gray to dark gray, portly sandy silt with shell fragments Soft to medium consistent. Silt clay, gray to dark gray, with shell fragments. Middle to portly shift consistentnt Preview of the sample done by PISTON CORER with penetration of 6 m (P- 2) on the recording of the geological profile Basin3_1. 8

Basin1_2.txt Basin1_3.txt B asin1_4.txt Basin1_5.txt Basin1_6.txt Basin1_9.txt Basin1_7.txt Basin1_11.txt txt Basin2_1.

txt Basin2_9.txt Basin3_1.txt B asin3_4.txt B asin3_12.txt Basin2_7.txt Basin2_3.txt B asin2_5.txt Basin3_13.

txt D106 13/12/2010 CONCLUSION: The equipment provided by the company INNOMAR from Rostock, called SES-2000 COMPACT,

data when operating in coastal areas and enclosed shallow lakes.

use. All the operating possibilities have not yet been examined, but once the equipment is in our possession, we shall

9 Basin1_2.txt Basin1_3.txt B asin1_4.txt Basin1_5.txt Basin1_6.txt Basin1_9.txt Basin1_7.txt Basin1_11.txt txt Basin2_1.txt Basin2_8.txt Basin2_6.txt Basin1_8.txt Basin1_10.txt Basin1_1.txt Basin1_13.txt Basin1_12.txt Basin2_4.txt Basin2_2.txt Basin2_9.txt Basin3_1.txt B asin3_4.txt B asin3_12.txt Basin2_7.txt Basin2_3.txt B asin2_5.txt Basin3_13.txt Basin3_11.txt Basin3_2.txt Basin3_3.txt Basin3_10.txt D106 13/12/2010 CONCLUSION: The equipment provided by the company INNOMAR from Rostock, called SES-2000 COMPACT, provided, at the lowest possible cost, fairly usable geological data for a preliminary study of the prospective waterway Town of Pag Košljun. The LOW WEIGHT and WATTAGE of the equipment, as well as the OPERATING CAPABILITY IN THE SHALLOW WATERS, provided usable data when operating in coastal areas and enclosed shallow lakes. With regard to the SMALL ANGLE OF THE BEAM, it allows for most precise geological surveys and guarantees a wide area of use. All the operating possibilities have not yet been examined, but once the equipment is in our possession, we shall use it in as many geological and archaeological surveys as possible, in the littoral and coastal areas and between the islands of the eastern Adriatic region. G8 G10 Elaboration: Basin2_3.txt BLATO Basin3_3.txt G7 Basin2_8.txt Basin2_6.txt LOKUNJA Basin3_4.txt P2 D106 Basin3_1.txt G6 MALIN SV. JELENA P1 D106 DONJA KIRŠINA BLATO LOKUNJA SV. JELENA RADAC 9

10 Enclosure Example: Basin1_6.txt Enclosure Example: Basin2_3.txt 10

11 Pictures of the Piston Corer Samples at P2 station: 1. 0 to 3 m; 2. 3 to 6 m; Thank you for your attention! Branko! 11

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Sediment and sedimentary rocks Sediment From sediments to sedimentary rocks (transportation, deposition, preservation and lithification) Types of sedimentary rocks (clastic, chemical and organic) Sedimentary