Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
The recent tufa body in Čimice Gorge in Prague 8
Abstract
Recent acceleration of tufa forming processes is recorded in Central Bohemia at various sites of Bohemian Karst and in the other areas built up by calcareous rocks. The new occurrence in Čimice Gorge in the nothern margin of Prague can be characterised by the presence of up to 20 cm high tufa cascades and microconcretional, sandy sediment. The tufa contains up to 1% of phosphates and several micrometers thin opaline lamellae consisiting of pure SiO2. The tufa body developed since 50-ties and possibly in the last 20 years. The phosphate content and the location of the site in a Prague suburb points to the accelerated formation caused by eutrophication processes.
