Dinocyst ages of some Jurassic strata, Grajcarek Unit at Sztolnia Creek, Pieniny Klippen Belt (Poland)

Dinocyst assemblages recovered from Jurassic strata of the Grajcarek Unit, Pieniny Klippen Belt, Poland, add new important data on their stratigraphic ages. The Jurassic ages of the Szlachtowa Formation flysch strata (Toarcian-Aalenian) and the Opaleniec Formation (Bajocian), already based on age-diagnostic macro-, micro- and nannofossils, have been confirmed. A critical evaluation of the age and field data presented in a recent paper by Oszczypko et al. (2004), who tried to prove a Cretaceous age of the Szlachtowa Formation ("black flysch") and the Opaleniec Formation, is given.