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Stratigraphy and microfacies of the Upper Cretaceous Pučišća Formation, Island of Brač, Croatia

The island of Brač is a small part of the large Adriatic- Dinaridic carbonate platform, mainly built up of Upper Cretaceous and, to a lesser extent, Palaeogene deposits. The Pučišća Formation (Campanian) is one of the six lithostratigraphic units of the Upper Cretaceous succession (the Brač Group) which includes carbonate deposits ranging in age from the Mid Cenomanian to Maastrichtian. The Pučišća Formation contains three superpositional-lateral subunits: the Brač Marble, the Rasotica, and the Lovrečina members, which comprise seven microfacies types (MF) of foraminifera-bearing limestones based on analysis of larger benthic foraminiferal assemblages and microfacies features. MF-types range from assemblages dominated by hyaline foraminifera (the Brač Marble Member, late transgressive systems tract, TST) to assemblages dominated by various taxa of imperforate foraminifera (the Rasotica and Lovrečina members, highstand systems tract, HST). The assemblages of benthic hyaline and imperforate foraminifera and microfacies are used for interpretation of palaeoenvironmental features of the Pučišća Formation. Some of the larger benthic foraminiferal species from the Pučišća Formation have enabled new morphological observations to be made.

Late Cretaceous ; Campanian ; Microfacies ; Larger benthic foraminifera ; Palaeoenvironments ; Sequence stratigraphy ; Adriatic– Dinaridic carbonate platform ; Croatia

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