Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Preliminary micropaleobotanieal characterization of a sample from the roof of the main brown-coal seam from the Bílina Mine (North Bohemia)
Abstract
At the present time palynological investigations have been carried out in the Bílina Mine, Most basin (former North-Bohemian brown-coal basin). The research work is concentrated on the micropaleobotanical characterization of the main brown coal measure and overlying rocks including the superseam clays-tone horizon (Early Miocene). In this paper, the report on micropaleobotanical content of the sample from "interbeds" is given. The interbeds are 10-15 m thick layers of the gray banded claystone without any fossil macroflora. The studied layer overlies the main coal seam and belongs to the superseam claystone horizont of the local stratigraphy. In the palynological spectrum, the pollen of the Taxodiaceae-Cupresaceae (Gymnospermae) and mono-, dicolpate palm pollen predominate. Monolete spores of the family Polypodiaceae and trilete spores of the Gleicheniaceae are rare. In contrast to the main seam spectra, the share of deciduous broad-leaved trees and shrubs (Betulaceae, Ulmaceae, Tillaceae, Fagaceae) grew. These elements are sporadic or lacking in the coal seam. The Liquidambar pollen has been newly discovered in the sample studied as well. This change of vegetation from the peat mire to the riparian forest was evoked by an ecological event - the flooding of the coal-forming swamp.
