engleski

Fossil tufa barrier Gazin kuk at the Zrmanja River (Croatia)

Zrmanja is a fluviokarstic river located in the Dinaric karst of Croatia. Tufa is a continental, highly porous limestone, which forms valuable geomorphological deposits as they enable palaeoenvironmental and palaeoclimatic reconstructions. For this purpose, fossil tufa samples were collected at the Gazin kuk barrier in the midstream of the Zrmanja River. The samples were prepared at the Laboratory of Physical Geography of the Department of Geography, Faculty of Science, and were dated using the 14C method (LSC technique) at the Ruđer Bošković Institute in Zagreb. The dating showed that the fossil barrier was formed between 5318±79 years BP, and 1618±78 years BP revealing thus its Holocene age. Based on the age - height analysis, barrier growth rate correspond to 0, 31 cm/year. The results showed that the relationship between height and age is mostly regular. This paper is part of the scientific project HRZZ–IP–11–2013-1623: Reconstruction of the Quaternary environment in Croatia using isotope methods, supported by the Croatian Science Foundation.

tufa barrier ; 14C method ; Zrmanja River ; Croatia

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