Naslov
Paleoceanographic implications of Smaller Benthic and Plnktonic Foraminifera from the Eocene Pazin Basin (Coastal Dinarides, Croatia)

Autori
Živković, Sanja ; Babić, Ljubomir

Izvornik
Facies (0172-9179) 49 (2003); 49-60

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
smaller benthic foraminifera; planktonic foraminifera; paleoecology; paleoceanography; Middle Eocene

Sažetak
Smaller benthic and planktonic foraminifera from the clastic sediments of the Pazin Basin (Istria, Croatia) were studied in order to obtain more data about paleoceanographic conditions that existed in the Middle Eocene Dinaric foreland basin. The succession investigated corresponds to the Middle Eocene planktonic foraminiferal zones Globigerapsis kugleri/Morozovelly aragonensis (P11), Morozovella lehneri (P12), and Globigerapsis beckmanni (P13). Benthic foraminiferal assemblages from the clastc succession are dominated by epifaunal trochospiral genera suggesting oligotrophic to mesotrophic conditions and moderately oxygenated bottom waters. Planktonic foraminiferyl assemblages indicate mesotrophic to eutrophic conditions of the surface waters, with increased eutrophications in the upper part of the section. Water depth, based, based on the ratio between planktonic and epifaunal benthic foraminifera and on the recognized species of cosmoplitan benthic foraminifera, was estimated to have been between about 900 and 1200 m. The basin was elongated and open to marine currents on both sides allowing good circulation and ventilation of the bottom water.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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