Naslov
Planktonic foraminiferal biostratigraphy across the Eocene/Oligocene boundary in the North Adriatic Sea
(Lanktonic foraminiferal biostratigraphy across the Eocene/Oligocene boundary in the North Adriatic Sea)

Autori
Premec Fuček, Vlasta ; Hernitz Kučenjak, Morana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Strati 2013, 1st International Congress on Stratigraphy, Ciências da Terra, Volume Especial VII / Rocha, R., Pais, J., Kullberg, J. C., Castro, L., Caetano, P. & Legoinha, P. - Lisabon : Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia, 2013, 21-21

ISBN
978-972-8893-09-5

Skup
Strati 2013, 1st International Congress on Stratigraphy

Mjesto i datum
Lisabon, Portugal, 01.07.2013. - 07.07.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
planktonic foraminifera; biostratigraphy; Eocene/Oligocene boundary; Adriatic Sea

Sažetak
The upper Eocene and lower Oligocene sediments from Istra more-3 and Istra more-4 wells, located on the eastern edge of the Venetian Basin, consist of hemipelagic deposits of marls and silty marls. These sediments contain abundant and very well preserved planktonic foraminiferal assemblages. The standard planktonic foraminiferal zonation of Paleogene after WADE et al. (2011) has been applied. The Eocene/Oligocene boundary in the Adriatic Sea is clearly defined by the extinction of all hantkeninids, the Turborotalia cerroazulensis group, and the last globigerinathekids species Globigerinatheka tropicalis, indicating strong climate deterioration and global cooling. Significant changes in small size fractions (<125μm) across the Eocene/Oligocene boundary have been observed. This boundary is also characterized by abundant occurrence of Chiloguembelina ototara, Tenuitella (T. praegemma, T. gemma) and by the first appearance of the tiny species Cassigerinella chipolensis.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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