Bosnia-Herzegovina and Montenegro)

• Main Author: Hilmar Von Eynatten
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Planktonic foraminifera
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.588.85; http://www.sediment.uni-goettingen.de/staff/dunkl/zips/Mikes-et-al-2008-GeolSoc.pdf

Abstract: Flysch deposits are associated with the Outer Dinaride nappe front. They overlie Eocene platform carbonate to bathyal marl successions that subsequently cover Cretaceous plat-form carbonates of Apulia and the Dinaride nappes. Planktonic foraminifer biostratigraphy indi-cates Eocene age of flysch sedimentation. New calcareous nannofossil data reveal that several assemblages are present; besides the dominant Mid-Eocene species, Cretaceous, Paleocene, Oligocene and Miocene taxa were also identified throughout the entire flysch belt. Widespread occurrence of nannofossil species of zone NN4-6 indicates that flysch deposition lasted up to at least the Mid-Miocene. Ubiquitous occurrence of various pre-Miocene taxa demonstrates that extensive, possibly submarine, sediment recycling has occurred in the Cenozoic. As flysch remnants are typically sandwiched between thrust sheets, these new stratigraphic ages give a lower bracket on deformation age of the coastal range. The data provide a link between Cretaceous compression in the Bosnian Flysch and recent deformation in the Adriatic offshore area. Cenozoic synorogenic clastic rocks overlie an upward-deepening Eocene carbonate platform to bathyal marl succession of the Apulian foreland and of the outermost parts of the SW-vergent Outer Dinar-ide thrust belt (Fig. 1). Established mostly on the basis of planktonic foraminifera, and locally by calcareous nannofossils, the stratigraphic age of the deposits has been traditionally placed into the Mid- or Late Eocene (Table 1). A SE-directed orogen-parallel younging of Palaeogene sedimentation has been inferred by Piccoli & Proto Decima (1969). Recent calcareous nannofossil studies indicate, however, that at several locations in the central and SE part of the basin system clastic deposition lasted up to the Middle Miocene (review in de