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Brackish Ostracods in Early/Middle Miocene and Holocene Lake Deposits ; are Analogies Acceptable? (CROSBI ID 682629)

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Hajek Tadesse, Valentina Brackish Ostracods in Early/Middle Miocene and Holocene Lake Deposits ; are Analogies Acceptable? // Knjiga sažetaka, Abstracts Book / Horvat, M. ; Matoš, B. ; Wacha, L. (ur.). Zagreb: Hrvatski geološki institut, 2019. str. 83-84

Podaci o odgovornosti

Hajek Tadesse, Valentina

hrvatski

Brackish Ostracods in Early/Middle Miocene and Holocene Lake Deposits ; are Analogies Acceptable?

Ostracods are small, bivalved crustaceans present in all aquatic and some terrestrial habitats. They are commonly preserved as fossils in sediments. In addition to ostracods ecological sensitivity to physical and chemical parameters, ostracods reflect the marine influence inside the paleolakes, and have great potential for the identification and reconstruction of transitional palaeoenvironments. The occurrence of indicative species, their proportion within the whole assemblage and the composition of the assemblage provide the important data for the interpretation of past changes (FRENZEL & BOOMER, 2005). This work studies the possible analogy between the brackish ostracods from Early/Middle Miocene lake deposits of Mt Požeška gora and ostracods from Holocene lacustrine deposits of the Adriatic coast. The aim of this study is to determine the changes in ostracod populations and occurrence and distribution of the first brackish ostracods by age and location of different paleolakes. According to GRIFFITHS & HOLMES (2000), post-Neogene ostracod assemblages/species can be compared with modern communities/taxa, allowing the understanding of ecological setting of past environments. Occurrence of brackish environmental marker taxa: Cyprideis torosa (JONES) and Cytheromorpha fuscata (BRADY) in Holocene deposits and Cyprideis sublittoralis POKORNÝ, Aurila sp., Leptocythere sp. and Amnicythere sp. in Miocene deposits, associated with halophile freshwater species indicates the dominant water type formed by the mixing of marine and fresh water and the variability in salinity of the investigated paleolakes. Findings of the mentioned brackish taxa coincide with research results of FRENZEL & BOOMER (2005) who have distinguished four ecological groups of brackish ostracods based on their salinity tolerance. There is no single formula or function which could be applied to all localities, but the exchange of marine and lacustrine palaeoenvironments in both Early/Middle Miocene deposits of Mt Požeška gora and Holocene deposits of the Adriatic coast is in accordance with climate changes, sea level changes and tectonic movements of the local or regional scale.

Ostracoda, Miocene, Holocene, Non-marine, Paleoenvironmental reconstruction

nije evidentirano

engleski

Brackish Ostracods in Early/Middle Miocene and Holocene Lake Deposits ; are Analogies Acceptable?

nije evidentirano

Ostracoda, Miocene, Holocene, Non-marine, Paleoenvironmental reconstruction

nije evidentirano

Podaci o prilogu

83-84.

2019.

objavljeno

Podaci o matičnoj publikaciji

Knjiga sažetaka, Abstracts Book

Horvat, M. ; Matoš, B. ; Wacha, L.

Zagreb: Hrvatski geološki institut

1849-7713

Podaci o skupu

6. hrvatski geološki kongres s međunarodnim sudjelovanjem

predavanje

06.10.2019-12.10.2019

Zagreb, Hrvatska

Povezanost rada

Geologija