Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Early Holocene tufa in the Malý dolík Valley near Bílichov (Džbán Plateau, NW Bohemia)
Abstract
The studied tufa deposit is situated at the foot of Turonian marlstone slope. Its basal layers consist of marlstone scree with marly matrix and are covered by a thick sequence of very fine-grained tufas capped by a strongly calcareous rendsina soil. The tufa sequence is dominated by a typical Early Holocene Discus ruderatus-malacofauna with high numbers of Perpolita petronella, Vertigo substriata and V. angustior as well as Fruticicolafruticum that reflects a parkland corresponding to the Preboreal and early Boreal. Woodland elements appear in the uppermost layer 2 bearing a rendsina soil with woodland fauna of the Climatic Optimum. This soil developed after an erosional phase at the Boreal-Atlantic boundary that stopped the tufa formation.
