Similarities and differences of marine sediment of the Adriatic Sea depending on various sedimentary environments

U građi istočne obale Jadrana dominiraju karbonatne stijene, mjestimice prekrivene flišem i drugim klastičnim stijenama. Sedimentacija u moru se stoga razlikuje obzirom na uglavnom lokalizirani transport materijala rijekama, erozije okolnih stijena i biogenu produkciju. Cilj ovog rada bio je povezati sličnosti i razlike sedimenta ovisno o taložnim okolišima. Glavne sedimentološke karakteristike sedimenta uzorkovanog na šest lokacija od Splita do Dubrovnika definirane su analizom veličine zrna, udjelom karbonatne komponente i vizualnim prepoznavanjem porijekla sedimenta. Sediment uzorkovan blizu ili ispred ušća rijeka karakteriziran je manjim udjelom karbonata i većim postotkom muljevite frakcije. Sediment sa sredine kanalskog područja sadrži oko 50% karbonatne komponente i značajnu količinu mulja, ukoliko postoji mogućnost dotoka siliciklastičnog materijala s kopna. Sediment izoliran od donosa s kopna bez obzira na dubinu uzorkovanja može biti visoko karbonatan i krupnozrnat, oboje kao posljedica biogene produkcije.The Eastern Adriatic coast is built of carbonate rocks, with the occasional presence of flysch and other clastites. Marine sedimentation differs from place to place, depending on mainly local river input, coastal rock erosion, and marine biogenic production. The aim of this work was to relate the characteristics of marine sediments with sedimentary environment conditions. The main sedimentological characteristics were investigated for six samples of marine sediment, sampled on 6 locations between Split and Dubrovnik, using granulometric analysis, carbonate component analysis, and visual identification of sediment origin. Sediment sampled near the river mouth contains lower carbonate material and a high share of mud. Sediment sampled in middle channel areas contained about 50% of carbonates and significant mud content when terrigenous sediment supply is possible even at a longer distance. Sediment isolated from terrigenous input regardless of sedimentation depth may contain high carbonate content, dominated in coarse fractions as a result of marine biogenous sedimentation