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Dinoflagellate cysts from the Szlachtowa Formation (Jurassic) and adjacent deposits (Jurassic–Cretaceous) of the Grajcarek Unit at Szczawnica-Zabaniszcze (Pieniny Klippen Belt, Carpathians, Poland)

Gedl P.

Geological Quarterly

2013

Vol. 57, No. 3

485–-502

The Jurassic–Cretaceous fine-clastic dark deposits of the Grajcarek Unit (Pieniny Klippen Belt, Carpathians, Poland) show lithological similarities, which may lead to erroneous age correlations. Their well-exposed outcrop at Szczawnica-Zabaniszcze allows detailed sampling for their precise age determination. For this purpose, dinoflagellate cysts have been studied from a set of samples collected from the Szlachtowa, Opaleniec, Pieniny Limestone, Kapuśnica and Wronine formations exposed at that site (additional sample from the Pieniny Limestone Formation was studied). The Szlachtowa Formation, a very characteristic lithostratigraphic unit, which consists of black shale and sandstones extremely rich in mica flakes, occasionally referred to literature as the so-called "black flysch", yielded rich and well-preserved assemblages. Their age is Middle Jurassic, spanning the Aalenian to Lower Bajocian. The exposures of the Szlachtowa Formation at Szczawnica-Zabaniszcze are located close to the outcrops of the Opaleniec Formation. The calcareous spotted shale from this lithostratigraphic unit yielded rich dinoflagellate cyst assemblage characteristic for Late Bathonian (Early Callovian). The Opaleniec Formation tectonically contacts with very similar non-calcareous spotted shale of the Wronine Formation. Its age, based on infrequent dinoflagellate cysts is Aptian–Albian. Similar, Lower Aptian age was concluded for the Kapuśnica Formation. Late Barremian–earliest Aptian dinoflagellate cysts have been found in the underlying topmost part of the Pieniny Limestone Formation.

Wiek formacji szlachtowskiej (tzw. czarnego fliszu) i formacji z Opaleńca pienińskiego pasa skałkowego w Polsce na podstawie badań dinocyst

Gedl P.

Przegląd Geologiczny

2008

Vol. 56, nr 3

245-252

The Szlachtowa and the Opaleniec formations (Pieniny Klippen Belt, Poland) contain rich dinoflagellate cyst assemblages. The one from the Szlachtowa Formation (previously known as the "black flysch") is dominated by specimens representing the genera Dissiliodinium and Nannoceratopsis. The age of dinoflagellate cysts from this lithostratigraphic unit can be assumed as the Aalenian-Bajocian. Another assemblage occurs in the Opaleniec Formation. Being taxonomically more diverse, it contains several species including Ctenidodinium combazii, C. ornatum, Endoscrinium asymmetricum, Epiplosphaera gochtii, E. reticulata, Atopodinium prostatum, Adnatosphaeridium caulleryi. Age-range of this assemblage can be estimated as the Bajocian-Bathonian. No indications of Jurassic fossil redeposition that could justify suggestions of Cretaceous age of these lithostratigraphic units have been found.

Organic-walled Dinoflagellate cysts from some Jurassic and Cretaceous strata of the Grajcarek Unit at Hałuszowa, Pieniny Klippen Belt (West Carpathians, Poland)

Gedl P.

Studia Geologica Polonica

2007

Vol. 127

101-117

Palynological analysis of some flyschoid rocks exposed in a tributary of the Potok Hałuszowski creek revealed the presence of dinocyst assemblages of two different ages. The Jurassic one from the Szlachtowa Formation includes the genera Nannoceratopsis, Dissiliodinium, Kallo- sphaeridium, Rhynchodiniopsis and Meiourogonyaulax. This assemblage most probably represents an Early-?Late Bajocian. A younger assemblage (Late Cretaceous), was found in rocks attributed to the Hałuszowa Formation.