Paleoceńska mikrofauna a fliszu magurskiego na kontakcie z Pienińskim Pasem Skałkowym okolic Jaworek

Abstract

Paleocene foraminiferal assemblage from the Magura flysch at the contact with the Pieniny Klippen Belt, at Jaworki (Carpathians, Poland) Dark shales of the Szczawnica Formation (flysch — turbidite sequence), the oldest lithostratigraphic unit of the Magura Nappe close to the Pieniny Klippen Belt of Poland, yielded at Czarna Woda near Jaworki (Figs. 1, 2) a Paleocene microfauna consisting of planktonie and benthic elements. The planktonic element consists of Globigerina triloculinoides Plummer and G. linaperta Finlay. The benthic element consists of two assemblages, the arenaceous and calcareous ones. The arenaceous assemblage is represented by scarce Dendrophrya sp.f Spiroplectammina dentata (Alth), Gaudryina aissana Ten Dam et Sigal and Dorothia trochoides (Marsson); these foraminifers lived in cold waters at the bottom of the Paleocene flysch basin. The calcareous benthic assemblage is very rich but often strongly damaged. It consits of Lenticulina cf. revoluta Israelsky, Marginulina cf. costulata Hofker, Nuttallides truempyi (Nuttall), Rotalia trochidiformis (Lamarck), Pararotalia tuberculifera (Reuss), Cibicides cf. sahlstroemi Brotzen, C. succedens Brotzen, Anomalina cf. danica (Brotzen) and Hoeglundina scalaris (Franke), moreover Epistominella sp., Cibicides sp., Anomalina sp. and Osangularia sp. The character of the calcareous benthic assemblage is foreign to deep turbidite basins of the Palaeogene flysch in the Carpathians. It was most probably redeposited by turbidity currents from a shallow, warm coastal zone.