Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Micropaleontological investigation in the easternmost part of the Ohře river rift. Czech and Polish part of the Zittau basin
Abstract
Sporopollen associations have been examined from the complete borehole profiles of the Czech and Polish parts of the Zittau basin. It was recognized that the basal assemblages were composed predominantly of hydrophilous plants, associated with Arecipites (palms), frequent Tiliaceae and abundant Alnus, derived from a rich alnests. Arcto-Tertiary representatives seem to prevail in the basal basinal deposits. The assemblage of prevailing Engelhardtia-Castanea with admixture of Platanus pollen has been recorded in the lowermost fossiliferous layer of carbonaceous clay, in the Czech part of the basin only. Its composition is well comparable with the basal basinal assemblages of the western part of the Ohře river rift. The records from the overlying coal-bearing complexes referred to the bog-forming swampcypresses association, with great proportion of Fagaceae and thermophilous paleosubtropical plants - Sapotaceae, Symplocos, Palmae, Calamoidae, Magnoliaceae, Reevesia, Araliaceae-Cornaceae, and a lower admixture of the Arcto-Tertiary taxa, with an exception of abundant Alnus and frequent Carya. In the basal sediments of the Polish part of the basin, cf. Plicapollis pseudoexcelsus has been ascertained, associated with Arecipites and hydrophilous macrophytes of the same taxa composition as in the Czech part of the basin.
