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Natura Croatica Issue number: Natura Croatica, Vol. 10 No.4

Holocenska sedimentacija u solinskom kanalu (Mljetska jezera, Jadransko more)

Authors: Damir P. Govorčin, Mladen Juračić, Nada Horvatinčić, Vladimir Onofri

Authors and affiliation

  • Damir P. Govorčin Department of Geology, Faculty of Science, University of Zagreb, Zvonimirova 8, 10000 Zagreb, Croatia
  • Mladen Juračić Department of Geology, Faculty of Science, University of Zagreb, Zvonimirova 8, 10000 Zagreb, Croatia
  • Nada Horvatinčić Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
  • Vladimir Onofri Institute of Oceanography and Fisheries Split, Laboratories Dubrovnik, P.O.Box 83, 20101 Dubrovnik, Croatia

Abstract

A 103 cm long core from the Soline Channel (Mljet Island, Adriatic Sea), which is at present a surface connection between the peculiar marine Mljet Lakes and the open sea, indicates substantial changes of the sedimentary environment in the Holocene. In the layer dated to 4,600 B.P., 25–30 cm below the bottom (which is at 2.8 m depth), freshwater algae represented by species of Chara/Nitella were found along with the gastropod Limnea stagnalis. This dominantly brackish sediment extends from 10 to 60 cm below the bottom. Above that interval marine sediment was found and below it quartz dominated the subareal or freshwater sediment. This indicates that the surface marine connection between Mljet Lakes and the sea was established after deposition of freshwater/brackish sediments i.e. not earlier than ca. 4 kyr B.P.

Keywords

freshwater deposits; ostracods; gastropods; foraminifers; Characeae; Quaternary; Croatia

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