Turonian–Coniacian (Upper Cretaceous) of the Babadag Basin (North Dobrogea, Romania): integrated biostratigraphy and microfacies succession

Damian Gerard Lodowski, Ireneusz Piotr Walaszczyk, Eugen Grădinaru

Abstract


The Upper Turonian to Middle Coniacian (Upper Cretaceous) succession of the Babadag Basin (North Dobrogea, Romania) constitutes an apparently continuous fossiliferous carbonate succession. The presence of moderately rich inoceramid, ammonite and foraminiferal assemblages allows for the application of a precise biostratigraphic subdivision. The palaeoenvironmental conditions and evolution of the Babadag Basin during the Late Turonian–Middle Coniacian are inferred using microfacies analysis and foraminiferal spectra. Together, these suggest the Turonian–Coniacian Badabag Basin reflects relatively shallow-water conditions in a near-shore environment, punctuated by two regression events in the Late Turonian and in the Middle Coniacian.


Keywords


microfacies; petrology; inoceramids; ammonites; foraminifera; palaeoenvironment

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DOI: https://doi.org/10.7306/gq.v63i1.26026