In: Kaminski, M.A. & Filipescu, S., (eds), 2011. Proceedings of the Eighth International Workshop on Agglutinated Foraminifera. Grzybowski Foundation Special Publication, 16, 151-172. Upper Eocene agglutinated foraminifera from Buciumeni section (Ialomița Valley, Dâmbovița District, Romania) THEODOR NEAGU 1 , DAN PETRE POPESCU 2 , ILEANA MONICA CRIHAN 3 , and GHEORGHE POPESCU 2 1. Department of Paleontology, University of Bucharest, N. Bălcescu 1, 010041, Bucharest, Romania 2. Str. Arh. Petre Antonescu nr. 4, bl. 29, apt. 14, sector 3, 023591 Bucharest; e-mail: gippopescu@yahoo.com 3. University Petrol-Gaze, Department Geology-Geophysics, Bd. Bucuresti nr. 39, 100680 Ploiesti; e-mail: crihanim@mail.upg-ploiesti.ro ABSTRACT The Văcăroaia Formation outcropping at Buciumeni village contains a rich assemblage of deep-water agglutinated foraminifera. We report the occurrence of 33 species, including two new species: Cyclammina buciumensis and Reticulophragmium gerochi. The diverse agglutinated assemblages are found in grey and green marls of late Eocene age, which are overlain by the uppermost Eocene globigerinid marly limestones of the Buciumeni Formation. INTRODUCTION The Buciumeni section is situated at the downstream exit from Buciumeni village on the left slope of Ialomiţa Valley (southern flank of the Buciumeni Syncline – Ștefănescu, 1995). The section, a contin- ous outcrop, begins with lowermost Oligocene deposits and ends in the upper part of the upper Eocene. The Oligocene deposits, almost 15 m thick, are made of shales with some 5 to 10 cm thick intercalations of laminated coccolith limestones (of the Tylawa type). Ştefănescu (1995) named the Lower Oligocene deposits “lower horizon of the dysodile shales”, representing the lower part of the Valea Caselor facies. Under the previously mentioned deposits there is a sudden passage to finer oceanic deposits, represented by white, compact, often indurated marls, very rich in organic remnants, especially planktonic foraminifera. These marls appear as 10-15 cm thick strata, alternating with greenish or reddish marls and with rare intercalations of sandstones. This pile of rocks sums up to 17 m in Ialomiţa Valley and was named by Olteanu (1952) „The upper subdivision of the whitish Globigerina marls” and by Ştefănescu (1971, 1995) „the Buciumeni calcareous marls horizon”. D.P. Popescu (2002) described this mostly marly interval as the Buciumeni Formation. Below the Buciumeni Formation in the Ialomiţa Valley section, a close alternation of greyish or greenish marls (2-40 cm thick) and calcareous sandstones with hieroglyphs (5-10 cm thick) is developed that is very rich in organic remnants, mostly agglutinated foraminifera, and rare planktonic foraminifera. Lithostratigraphically, these deposits belong to the upper part of the Văcăroaia Formation (Popescu, 2002), an equivalent of what Ştefănescu (1995) named the “upper flysch horizon”. MATERIAL From the previously described sequence, one of the authors collected 22 micropaleontological samples for the study of foraminifera, the resulting data being used in his Ph.D. thesis (D.P. Popescu, 2002, unpublished). Nine samples containing mostly planktonic foraminifera characteristic for the uppermost Priabonian were collected from the Buciumeni Formation. The species Subbotina corpulenta (Subbotina) and S. eocaena (Gümbel) predominate. Very rarely, in the finer fraction, some specimens of Chiloguembelina cf. C. gracillima (Andreae) were recorded. Together with the plankton, especially in the gray levels, rather poorly preserved benthonic foraminifera also occur (deformed and difficult to wash due to the calcareous content of the rock). The agglutinated foraminiferal association from the Buciumeni Formation is very much like the one from the upper part of the Văcăroaia Formation, with the exception of cyclamminids, which are the almost absent in the Buciumeni Formation. All foraminifera described and illustrated in this study come from the Văcăroaia Formation outcropping at Buciumeni. Here, the planktonic foraminifera are rare and belong mostly to the species Globigerinatheka index (Finlay). The samples collected from the Lower Oligocene deposits above the Buciumeni Formation lack foraminifera. No nannoplankton studies have been made on the laminated limestones intercalated