Biostratigraphy of the Upper Cretaceous of Romania

Upper Cretaceous volcanoclastic-sedimentary formations in the Timok Eruptive Area (eastern Serbia): new biostratigraphic data from planktonic foraminifera

“…It corresponds to the D. imbricata Zone and the lower part of the M. renzi-M. sigali Zone of Dimitrova & Valchev (2007). The Helvetoglobotruncana helvetica Zone defined here is correlated with the joint interval from the upper part of the D. imbricata Zone to the lower part of M. sigali Zone of Ion & Szasz (1994). The age of this zone is assigned to the Early Turonian.…”

“…Age and correlation: This zone corresponds to the Thalmanninella reicheli Zone of Caron (1985), Sliter (1989), Robaszynski & Caron (1995) and Premoli Silva & Verga (2004); to the lower part of the Rotalipora cushmani Zone of Dimitrova & Valchev (2007) and Peryt (1980); to the R. cushmani Zone of Ion & Szasz (1994). The age of this zone is Middle Cenomanian.…”

“…Age and correlation: The D. concavata Zone corresponds to the zone of the same name recognized by Sliter (1989), Robaszynski & Caron (1995), Premoli Silva & Sliter (1995), Robaszynski et al (2000), Premoli Silva & Verga (2004), Peryt (1980) and Babazadeh et al (2007). It corresponds to the upper part of the D. primitiva Zone and the D. concavata Zone of Dimitrova & Valchev (2007); to the joint interval from the upper part of the M. tarfayensis Zone to the lower part of the D. asymetrica Zone of Ion & Szasz (1994). The age of this zone is Early Coniacian to earliest Santonian.…”

“…Age and correlation: This zone is the same as the Rotalipora cushmani Zone recognized by Caron (1985), Sliter (1989), Robaszynski & Caron (1995) and Premoli Silva & Verga (2004). It corresponds to the upper part of the R. cushmani Zone of Dimitrova & Valchev (2007) and Peryt (1980); to the W. paradubia Zone and the lower part of the D. imbricata Zone of Ion & Szasz (1994 (Caron 1985;Sliter 1989;Robaszynski & Caron (1995); Premoli Silva & Verga 2004). It is identical with the H. helvetica Zone of Peryt (1980).…”

“…The zone corresponds to the joint interval from the upper part of the M. renzi-M. sigali Zone to the lower part of the D. primitiva Zone of Dimitrova & Valchev (2007); from the upper part of the M. sigali Zone to the lower part of the M. tarfayensis Zone of Ion & Szasz (1994). It corresponds to the lower part of the M. coronata Zone of Peryt (1980); to the M. sigali Zone and the lowermost part of D. concavata Zone of Babazadeh et al (2007) and Sliter (1989).…”