New data on Quaternary organic sediments on the territory of the Bohemian Paradise Geopark


Eva Břízová

Geoscience Research Reports 43, 2010 (GRR for 2009), pages 87–95

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Within the geological mapping in the territory of the Geopark Bohemian Paradise (Český ráj) the biostratigraphical research of organic sediments on the map sheets of Semily, Kněžmost, Rovensko pod Troskami, Turnov, Lomnice nad Popelkou (1 : 25,000) were carried out. The known localities were verified and sediments for pollen analysis and radiocarbon dating were sampled on all found localities: Nová Ves (NVM), Karlovice (KR 2), Koberovy (KBRV), Rokytnice (RKT), Želejov (ŽEL), Mříčná - Zimrov (M-Z), Žehrov - Skokovy (Ž-S), borehole Karlovice KR 1, Pod Lipinou, Mříčná - Chocholka, Buda, Komárovský rybník Pond, Sněhurka, Obora. For the time-trouble reasons the most complete samples were chosen for the detailed palynological, palaeoalgological and palaeoecological research. During palynological study of Upper Pleistocene and Holocene organic sediments, the Quaternary palynomorphs and the Cretaceous spores, dinocysts and foraminifera were found. The palynomorph redeposition is from the marine Cretaceous sediments. The preservation of calcareous foraminiferal tests in the palynological slides is very unusual due to their unexpected resistence to acids. Tests of foraminiferal species are mostly reworked by transport.