Pelech, O., Józsa, Š. & Olšavský, M., 2025: Santonian-Campanian marly and biodetritic facies in the Púchov Formation in the Orava sector of the Pieniny Klippen Belt (Slovakia) [Santónsko-kampánske jemnozrnné a biodetritické fácie v púchovskom súvrství zdokumentované v oravskom úseku pieninského bradlového pásma]. Mineralia Slovaca, 57, 1, 59 – 80.
DOI: https://doi.org/10.56623/ms.2025.57.1.4
Abstract: The Pieniny Klippen Belt is characterized by the block-in-matrix fabric with Jurassic to Lower Cretaceous rigid klippen embedded in less competent Upper Cretaceous flysch and marlstone matrix. The studied area is located in the Orava sector of the Pieniny Klippen Belt. Based on results of recent geological mapping and biostratigraphic analysis, the paper distinguishes a new formal lithostratigraphic unit – the Kňažia Member/Beds composed dominantly of white marly limestone, with lenses of biodetritic limestone, calcarenite to conglomerate of the Bradlo-type limestone. The new member occurs at several localities along the studied Orava sector of the Pieniny Klippen Belt, with the largest volumes north of Dolný Kubín (Opálené Hill) and Podbiel (Lučivný vrch Hill). Both lithostratigraphic units contain relatively abundant planktonic foraminifera co-occurring in the middle Campanian Contusotruncana plummerae Zone. The interbedding biodetritic limestones correlated with the Bradlo-type limestone are rich in Pseudosiderolites spp. and contain Santonian–Campanian rudists. The Kňažia Member represents the lower part of the pelagic basinal sediments within the Upper Cretaceous Púchov Formation. The occasional bodies of allodapic calcarenites of the Bradlo-type limestone represent channel fills composed of shallow water carbonate detritus.
Key words: Upper Cretaceous, geological mapping, foraminifera, microfacies, Kňažia Member, Bradlo-type limestone