Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 5. 1974. (Budapest, 1974)

The zones discussed in this present paper have been estabilished on the basis of the afore mentioned principles. The sphere of applicability of these zones extends over the Carpathians, and possibly (but from the Uppermost Eocene up to the Middle Oligocène certainly) to North European areas too. The zones presented here are tentative.Further precision is possible, because the transition of the Lower and Middle Oligocène,as well as the upper part of the Oligocène are free of planktonic foraminifers in Hungary. PLANCTONIC FORAMINIF

ER ZONATION Globigerinatheca semiinvoluta Zone Author

: BOLLI, 1957a, pp. 159-160. Definition: Characterized by the continuous occurrence range of the species Globigerinatheca semiinvoluta (KREIZER). Remarks

: The lower and upper boundary of the zone is unknown on the studied area .Borehole Cinkota-6. yielded two samples (Nos. 24, 26.) which can be ranged into this zone on the basis of the occurrence of the species Globigerinatheca globosa (= G. tropica lis BLOW et BANNER). The occurrence of Turborotalia cerroazulensis applanata also suggests the lower part of the Upper Eocene. The poor planktonic fauna of these two samples may be due to the unfavourable shallow-water facies. Turborotalia cocoaensis Zone Author

: BOLLI, 1957a, p. 160. Definition: From the disappearance of Globigerinatheca semiinvoluta up to the extinction of Turborotalia cerroazulensis cocoaensis

. Remarks

: On the basis of a sample (No. 19.) from Borehole Cinkota-6. and the poor fauna yielded by the upper part of the Bryozoan Marl of Buda, the presence of the zone in the vicinity of Budapest seems to be proved. In the fauna appears the subspecies Turborotalia cerroazulensis cocoaensis very rarely, together with T. aff. centralis

, T

. increbescens, Subbotina eocaena eocaena, S. linaperta and Globigerina tripartita

. The zonal index disappears at the boundary of the Bryozoan Marl of Buda and the Buda Marl (SZŐTS,1968, SZTRÁKOS, 1974b). Catapsydrax gortanii gortanii Zone Author

: BLOW and BANNER 1962, p. 68. (Designated as Globigerina turritilina turritilina Zone, here modified.) I Tabelle I. Correlation chart of the Upper Paleogene Zones. I. táblázat. A felső paleogén zónák korrelációja.