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[36890] Artykuł: Litologia i zespół akritarchowy formacji z Zalesia w Górach Świętokrzyskich na tle zmian poziomu morza i paleogeografii późnego ordowiku(Lithology and acritarch assemblage of the Zalesie Formation in the Holy Cross Mountains on the background of the Late Ordovician paleogeography and sea-level changes)Czasopismo: Przegląd Geologiczny Tom: 57, Zeszyt: 2, Strony: 147-157 ISSN: 0033-2151 Opublikowano: 2009 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w recenzowanym czasopiśmie wymienionym w wykazie ministra MNiSzW (część B) Punkty MNiSW: 4 Keywords: Hirnantian  regression  acritarchs  redeposition  Poland  |
The uppermost Ordovician in the Holy Cross Mountains is represented by sandy
mudstones, sandstones and marls of the Zalesie Formation deposited during the Hirnantian
regression. Two arcitarch assemblages were recognized in the studied Upper Ordovician
succession of the southern Holy Cross Mountains. The first one is dominated by species
of Baltisphaeridium, Polygonium, Exculibranchium, Orthosphaeridium, Ordovicidium,
Peteinosphaeridium, Multiplicisphaeridium, which occur in the upper Caradoc deposits.
Upward in the section, these taxa are replaced mainly by diversified species of Veryhachium
occurring together with Domasia, Deunfia, Leiofusa, Polygonium, Cheleutochroa,
Multiplicisphaeridium and Polygonium. In the Zalesie Formation (upper Ashgill) they are
accompanied by the redeposited Furongian/Lower Ordovician specimens and the Middle Ordovician species of the peri-Gondwanian
affinity (e.g. Frankea), which were likely transported from Avalonia during collision of this terrane with Baltica.