Abstract
The area of investigation is situated close to the contact zone between the Pieniny Klippen Belt, Krynica Subunit of the Magura Nappe and the Neogene strata of the Orava–Nowy Targ Intramontane Basin (southern Poland). In the area studied, marine deposits of the Stare Bystre Formation outcrop at the surface where they emerge from beneath freshwater and terrestrial Neogene and Quaternary deposits. Nannofossil assemblages from all samples are strongly dominated by reworked species. The Early Miocene age (NN2) of the Stare Bystre Formation has been determined on the base of the first occurrence of Sphenolithus disbelemnos after Shackleton et al. (2000). During the Late Oligocene (NP25/NN1), the frontal part of Magura Nappe was thrust northwards on to the terminal Krosno flysch basin. The northwards thrusting of the Magura Nappe was accompanied by the formation of the piggy-back basin on the Magura Nappe, filled with the synrorogenic turbidites belonging to the Zawada, Kremna and Stare Bystre formations (NN2).
Highlights
The youngest deposits of the Magura Nappe in Podhale have long attracted interest and controversy (Cieszkowski and Olszewska, 1986; Birkenmajer and Dudziak, 1988; Cieszkowski, 1992; Gedl, 1995) as the dating of the youngest deposits from the Magura Nappe is important both for understanding the tectonics of the Outer Carpathians and for the interpretation of the final evolution of the Central Carpathians and the Pieniny Klippen Belt
The age determination was made on the presence of Sphenolithus disbelemnos in almost all samples (Fig. 6P–U) which according to Young (1998) is an index species for the lower part of the NN2 nannoplankton zone
The age of the deposits in previous works was based on the presence of Discoaster drugii, Sphenolithus ciperoensis, Sph. heteromorphus, Sph. abies, Helicosphaera ampliaperta, H. recta, Reticulofenestra pseudoumbilica and Discoaster kugleri (Smagowicz in Cieszkowski et al, 1991)
Summary
The youngest deposits of the Magura Nappe in Podhale have long attracted interest and controversy (Cieszkowski and Olszewska, 1986; Birkenmajer and Dudziak, 1988; Cieszkowski, 1992; Gedl, 1995) as the dating of the youngest deposits from the Magura Nappe is important both for understanding the tectonics of the Outer Carpathians and for the interpretation of the final evolution of the Central Carpathians and the Pieniny Klippen Belt. In subsequent papers Cieszkowski (1995) and Cieszkowski and Struska (2009) linked the question of the youngest deposits from the Magura Nappe with the debatable presence of marine Middle Miocene deposits in the Orava–Nowy Targ Intramontane Basin, without additional biostratigraphic data. All these papers described and discussed the section exposed at Stare Bystre (sometimes under the name of Rogoźnik), first described by Watycha (1976) as the Turbacz beds of Paleocene–Early Eocene age
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