Benthic Foraminiferal Biostratigraphy of the Tertiary Sedimentsfrom the Elazig and Malatya Basins, Eastern Turkey

摘要

Tertiary sequences in the Elazig and Malatya Basins, eastern part of Taurus Orogenic Belt, are investigatedwith the aim of defining the benthic foraminiferal biozones. Tertiary geological units from bottom to top are as follows:Basement rocks, Zorban Formation, Yildiztepe Formation, Suludere Formation, Gedik Formation (Malatya Basin);Elazig Magmatics, Keban Metamorphics, Harami Formation, Kuscular Formation, Seske Formation, Kirkgecit Formation(Elazig Basin). Middle-Upper Eocene Yildiztepe, Suludere and Gedik Formations; Upper Paleocene-Lower EoceneSeske Formation and Middle-Upper Eocene Kirkgecit Formation are all characterized by interbedded clastics and carbonaterocks. Six stratigraphic sections are studied in detail for foraminiferal biostratigraphy. Eight benthic foraminiferal biozonesare reported. These are; Coskinolina rajkae biozone in the Late Paleocene (Thaneti an), Assilina yvettae, Idalina sinjaricabiozones in the Late Paleocene; Asterocyclina alticostata gallica biozone in the Early Eocene (Late Cuisian), Nummulitesmillecaput biozone in the Middle Eocene (Middle Lutetian), Nummulites aturicus biozone in the Middle Eocene (LateLutetian), Nummulites perforates biozone in the Middle Eocene (Bartonian), Nummulites fabianii biozone in the LateEocene (Priabonian). Some key taxa are illustrated.