Final conference of the LoLADRIA project “Submerged Pleistocene landscapes of the Adriatic Sea“

This year the 5th Regional Meeting hosts the Final conference of the LoLADRIA project “Submerged Pleistocene landscapes of the Adriatic Sea“, organized by Croatian Geological Survey. The meeting will take place in Starigrad-Paklenica, from 9th to 10th November 2017.

This topic intends to uncover submerged landscapes in relation to sea level change.  Global sea level during the last 500,000 years oscillated between 120-130 m below present sea level and 5-10 m above present sea level. Since the sea was lower than at present for most of the last million years, large areas of land were exposed and were occupied by terrestrial vegetation, animals, and early humans. An assessment of Holocene sediment thickness will be examined along the Eastern Adriatic coast and the position of former coastlines at different time-frames including the Last Glacial Maximum. Submerged landscape features (landforms and deposits) and palaeoenvironmental indicators can be classified through an appraisal of existing records (e.g. bathymetry maps, geophysical data, sediment cores) and include:

  • coastal (shorelines, lagoons, beaches, estuaries etc.),
  • riverine (valleys, channels, deltas, terraces etc.),
  • subaerial (aeolian, rough or flat terrains, karst, volcanic etc.),
  • water points (groundwater discharge points, freshwater lakes etc.), and
  • archaeological data.

The conference aims to bring together sedimentologists, geochemists, mineralogists, geomorphologists and paleontologists with interests in interdisciplinary research of high resolution paleoenvironmental reconstructions of submerged karstic depressions during the Late Pleistocene and Holocene sea level rise. The answer lies beneath the sea in the mud and sediments of the continental shelf.

The website of the meeting is: https://inqua-croatia.wixsite.com/regional-mtg-2017.

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MOPP-MEDFLOOD workshop in Sardinia

In the period between 24-27 September 2017 team memeber Dea Brunović participated in second MOPP-MEDFLOOD workshop, held in Sardinia. MOPP-MEDFLOOD is INQUA funded project that gathers scientific community working on the sea-level changes during the Late Pleistocene and Holocene in the Mediterranean region. This year, workshop offered field perspective on different sea-level indicators that are present along coastline of Sardinia. Participants were able to observe geological and archeological indicators of sea-level change, such as beachrocks, roman pier, archaeological settlements, salt-marshes, dunes and coastal lagoons. Scientists with different research background discussed on the field numerous advantages and disadvantages of using different sea-level indicators for reconstruction of Late Pleistocene and Holocene sea-level changes. Worshop also included visit to Nuragic archeological settlement that dates back to the Bronze Age. Last day of workshop, organized at City Hall of Palau, was dedicated to presentations of young researchers. Sessions included presentations on paleoenvironmental reconstructions, archeological indicators of sea-level change and modelling of paleo-processes.

Figure 1: Beachrock with ceramics and animal bones.

Figure 2: Granite rocks with MIS 5 dunes.

Figure 3: Nuragic archeological settlement.

Figure 4: Participants of MOPP-MEDFLOOD workshop in Sardinia.

Figure 5: Salt marsh.

 

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Field workshop “Breaking the surface”

An interesting meeting about marine research and methods used in its exploration is going to be held in Biograd na Moru in Croatia, from 1st to 8th October 2017.  The topics of this international interdisciplinary field workshop of maritime robotics and applications “Breaking the surface – BTS” are maritime robotics, marine biology, marine archaeology, maritime security and marine geology. The PI of the project dr. Slobodan Miko will participate as invited speaker, presenting the LoLADRIA project and submerged landscapes of the Eastern Adriatic Sea. The workshop will gather international experts, universtiy professors, scientists, industry representatives and students from various fileds. The 7 days long programme consists of lectures, field demonstrations of latest technological achievements and tutorials which offer hands-on experience in working with complex and modern underwater systems. In addition, a whole-day workshop “Innovation day” will share experience of robotics experts in commercializing robotics-related technologies with the rest of scientific community and aspiring entrepreneurs. The workshop is organized by the University of Zagreb, Faculty of Electrical Engineering and Computing, Laboratory for Underwater Systems and Technologies, Centre for Underwater Systems and Technologies.

The webiste of the workshop is:        http://bts.fer.hr/

 

 

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Poseidon Cruise POS514

Team members Ozren Hasan and Nikolina Ilijanić are participating on the scientific cruise in the Adriatic Sea on research vessel (RV) Poseidon (Kiel, Germany). Cruise started from Heraklion on Crete on 27th of May and will end on 16th June in Dubrovnik. They are experiencing the off-shore life on a 60 m-ship, which includes drilling with gravity corer (3, 5 or 8 m core tube), sampling of the sea-surface sediments using multi corer, Frahm corer, box corer and Van Veen grab corer, sampling of the plankton at various depth and measurements of conductivity, temperature, oxygen and fluorescence of the sea water column. The cruise entitled „Micropaleontology, Actuopaleontology, and Environmental Baseline Study of the Holocene to latest Pleistocene in the northern and eastern Adriatic Sea basin“ (Code name: APTA: Actuo-Paleontology Trans-Adriatic) is organized by the chief scientist Hartmut Schulz from the University of Tübingen, in coordination with Slobodan Miko from the Croatian Geological Survey. The 21 days-long cruise is financed by the German Research Foundation (DFG). The scientific crew make James Nebelsick and Tobias Grun from University of Tübingen, Petra Heinz, Julia Wukovits, Patrick Bukenberger and Martin Zuschin from Vienna University, Guiseppe Siena and Nydia Catalina Reyes Suarez from National Institute of Oceanography in Trieste and Ozren Hasan and Nikolina Ilijanić from Croatian Geological Survey.

CTD (Coductivity Temperature Depth) is deployed routinely at most stations at variable depths, it has a bulk flourescence sensor and bottles for water sampling. MultiNet (5 nets) is also deployed at variable depths (ie 100 and 700 m) for plankton sampling using 100 and 63 µm nets. Samples are immediately deep frozen and stored.

Ozren Hasan and Nikolina Ilijanić are responsible for operating the Gravity Corer (GC), heavy instrument that includes heavy work setting up of variable 3 and 5 m core tubes up to 10 m total length. Cores are immediately cut into 1m-sections, capped, sealed, labeled and stored/cooled to be opened in Tübingen. Short cores (< 50 cm) are collected using the Multi Corer (MUC) able to collect as much as 8 cores in the same time. Only the best are photographed, sliced by 1 or 2 cm interval and packed into plastic bags. On selected sites best sediment surface samples are collected (0-1, 1-2 cm) and also taken for incubation foraminifera experiments on board. Frahm Corer is used to collect up to 100 cm-long cores in shallower depths, the cores are photographed, sliced and packed in plastic bags. Van Veen Grab Corer is deployed mostly at shallow depths, robust, effective and it is used for instance surface and shallow benthos sieved/washed. Box Corer (BC) is used to collect up to 20 cm-long cores with well preserved sediment surface. Cores are photographed and sliced, than packed into plastic bags.

We wish them succesfull cruise, nice weather and lots of cores and sediments from the Adriatic Sea!

Fig. 1. Operating the Gravity Corer, Ozren Hasan and Hartmut Schulz on the Bridge and slicing the cores into 1m-sections.

Fig. 2. MultiCorer sampling, handled by the whole team.

Fig. 3. Setting up Frahm Corer and taking the core, by Tobias Grun, James Nebelsick, Hartmut Schulz and Martin Zuschin.

Fig. 4. Box corer sampling by Tobias Grun.

Fig. 5. Grab sampling.

Fig. 6. Photographing the multi corer and Frahm corer sediment cores, ready to be sampled (sliced by 1 or 2 cm interval) and washing of grab samples, work of the whole team, under supervision of chief scientist Hartmut Schulz.

Fig. 7. CTD, operated by Guiseppe Siena and Nydia Catalina Reyes Suarez.

Fig. 8. MultiNets, operated by Petra Heinz, Julia Wukovits and Patrick Bukenberger.

Fig. 9. Night work and taking samples from the grab corer, by James Nebelsick and Tobias Grun.

 

 

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Radionica LoLADRIA 2017

U sklopu LoLADRIA projekta organizira se radionica o istraživanju potopljenih paleookoliša u Salima na Dugom otoku, od 28. do 30. lipnja 2017. godine. Radionica je namijenjenja studentima diplomskih studija, doktorandima i mladim istraživačima. Detalje možete pročitati u sljedećim prilozima:

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Ozren achieved a doctoral degree

Recently, our colleague Ozren Hasan defended his doctoral thesis under the panel of Professors Slobodan Miko, Goran Durn and Mladen Juračić. His work is summed up under the title “Paleookolišna rekonstrukcija slivova Karinskoga mora, Novigradskoga mora i Velebitskoga kanala tijekom holocena” (“Paleoenvironmental reconstruction of the Karin Sea, Novigrad Sea and the Velebit Channel catchments during the Holocene”). In excellent presentation he showed a completely new data that are the result of the work of LoLADRIA project, combined geophysical research with sediment cores. The geophysical research was contucted in collaboration with the Marine Geology and Physical Oceanography Laboratory from Uni. Patras and Prof. G. Papatheodorou. The research in Novigrad Sea area represents this type of  approach for the first time in Croatian Quaternary science. The LoLADRIA team is very proud of him and wish all the best in his future work and research! Congrats, Ozren!

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Losinj Channel core subsampling

Detailed subsampling of cores retrieved in Losinj Channel has been performed for radicarbon dating and foraminifera assemblage determination. The analyzed cores LK-12 and LK-13 were collected from the depths of 64 and 12 m bsl, respectively. We are expecting interesting results about the timing of marine instrusion in Losinj Channel and new data for Deas PhD thesis!

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img_9365   mozaik2 euromex_9   euromex_18

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Season’s Greetings from LoLADRIA team

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The Koločep kanal and Elaphiti islands/Mljet Island marine geophysical survey

In the early 2016, began the preparation for the research of the new sites in LoLADRIA project – southern Dalmatia. The location is the huge canal in Dubrovnik archipelago, Koločepski kanal. It is surrounded by the islands Lopud, Koločep and Šipan (Elaphiti islands; https://en.wikipedia.org/wiki/Elaphiti_Islands), and several small islands toward Pelješac peninsula (Olipa and Jakljan islands).

This elongate submerged karst depression is characterized by the numerous submarine springs with  groundwater flowing from sinkholes (ponors) along the Trebišnjica river in Bosnia and Herzegovina. During the late Pleistocene  freshwater from the karst springs filled the silled basin (-50 m), hopefully forming a lake (it’s what we are looking for). At the end of April 2016, our project members from the Laboratory of Marine Geology and Physical Oceanography , University of Patras, (George, Dimitris, Maria, Nikos and Xenofon) and HGI_CGS (Slobodan, Ozren and Nikolina) spent one week surveying Koločepski kanal and the submerged river valley between Mljet island and Olipa island. Research vessel, Božja providnost II, was struggling with the strong bura winds during the geophysical survey (armed with an 3.5 kHz ORE Pinger with 4 transducers, Geopulse transceiver/receiver, Digital Acquisition System Triton Imaging Inc, and side scan sonar system: G&G. 272 TD towfish ),  but the results were outstanding. Very deep penetration of sub-bottom profiler allowed identification of 50 m of sediment sequences in the kanal. Fascinating sediment structures, sand plateaus, tectonics, river valleys  and erosion events were revealed. This research will give detail geomorphological evidence for reconstruction of paleolandscape during the Late Pleistocene and the last deglaciation. We will start coring in September 2016.

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XRF core scanning in ISMAR, Bologna

Last month, team member Dea Brunović spent 10 days at Institute of Marine Science (CNR-ISMAR), Bologna. Hosts, Annamaria Correggiari and Stefano Miserocchi have vast experience researching western part of the Adriatic Sea, which is well studied, unlike its eastern part that still remains partly unexplored. Therefore, their advices and help was invaluable for our study.

The main aim of this visit was XRF-core scanning of sediment cores from northern part of Eastern Adriatic Sea. Cores from Lošinj Channel, collected in September 2015 (https://loladria.wordpress.com/2015/10/13/fieldwork-in-the-losinj-bay/), show geochemical evidence od paleoenvironmental development of the area.  Especially interesting was core collected from the depth of 63 m, where we have alteration of sediments deposited in the sea and in the freshwater lake that existed during the Last Glacial Maximum. Generally, this research will improve our knowledge and help us track sea-level changes along the eastern coast of the Adriatic Sea and complement all the existing data about the sea-level rise in the Adriatic Sea. Additionally, two cores from nearby freshwater lake Vrana were also analyzed, as well as core collected in Meline embayment (Island of Krk). They will provide complete insight into environmental evolution of the northern part of the Eastern Adriatic Coast.

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Fig. 1. Avaatech XRF Core Scanner during the measurement of splitted sediment core section in CNR-ISMAR Bologna.

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Fig. 2. Lake Vrana sediment core image, section 147-276 cm, with the transition to the brighter sediment.

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Fig. 3. XRF results for the core from Lake Vrana on the Island of Cres.

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Fig. 4. Core LK-12P image and some gochemical parameters, collected in Lošinj Channel, that shows transition from marine (bottom) to lacustrine sediments (top).

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Fig. 5. CNR – National Research Council of Italy in Bologna.

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