Journal of

GEOsciences

  (Formerly Journal of the Czech Geological Society)

Original Paper

Radek Mikuláš

New information on trace fossils of the early Ordovician of Prague Basin (Barrandian area, Czech Republic)

Journal of the Czech Geological Society, volume 38 (1993), issue 3-4, 171 - 182

Coarse-grained sandstones of the Třenice Formation (Tremadocian) at Jivina locality yielded trace fossils Bergaueria aff. langi and Skolithos ichnosp. Spirophycus cf bicornis and ?Urohelminthoida ichnosp. are described from clay shales of the Šárka Formation at Praha - Jenerálka locality. Oolitic iron ores at the base of this formation (Ejpovice locality) contain frequent Bergaueria aff. hemispherica, Phycodes ichnosp., Planolites beverleyensis. From the facies of fine-grained sandstones with intercalations of clay shales (Velíz locality) derive the finds of Didymaulichnus ichnosp. and Helminthopsis ichnosp. The Dobrotivá Formation (Dobrotivian Stage) yielded trace fossil assemblages from the Ejpovice locality (rhythmical alternation of sandstones and shales; Diplocraterion, Bergaueria, Isopodichnus, Phycodes, Planolites, Tomaculum), from Praha, Pelc-Tyrolka locality (siltstones, greywackes, fine-grained sandstones; Dictyodora, Zoophycos, Rhizocorallium), from Praha-Žižkov (Zoophycos) and from Praha - I.P. Pavlov's square (Phycodes).