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Maastrichtian dinoflagellate cysts from North Bulgaria taxonomy, biostratigraphical and palaeoenvironmental interpretations.
| Pavlishina, P. | |
| 1995 | |
| Geologica Balcanica 25, 3-4, p. 125-143.Geologica Balcanica 25, 3-4, p. 125-143. | |
| Maastrichtian dinoflagellate cysts from North Bulgaria taxonomy, biostratigraphical and palaeoenvironmental interpretations. |
Pavlishina, P. 1995. Maastrichtian dinoflagellate cysts from North Bulgaria taxonomy, biostratigraphical and palaeoenvironmental interpretations. Geologica Balcanica 25, 3-4, p. 125-143. Abstract: Maastrichtian dinoflagellate cyst assemblages are documented for the first time from four sections in North Bulgaria. 20 species belonging to 16 genera are fully described. The new combination Trithyrodinium trendallii (Cookson & Eisenack) is proposed. The obtained dinocyst assemblages are palynologically distinctive and easily correlated with the biostratigraphycally well-controlled dinocyst framework established for Western Europe and the type Maastrichtian area. They indicate Triblastula utinensis Zone in the investigated sections. The age of the zone is from the middle part of the Early Maastrichtian to the early part of the Late Maastrichtian. The changes in the composition of the dinocyst assemblages in the section at Darmanci are related to depositional environments.The Kunino Formation is considered to represent a quite energy depositional environment, realized in a partially enclosed inshore basin. This formation contain rich, but uniform dinocyst assemblages represented only by two species. The Mezdra Formation which represents an more open marine depositional environment contains rich, diverse and well preserved dinocyst assemblages.