Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Calcareous tufa in the Čimice-creek valley in Prague 8
Abstract
Coatings, crusts and cascades of calcite foamstones occur frequently in beds of rocky ravines and cloughs on the right bank of the Vltava-river north of Prague. They precipitate from waters naturally over saturated by calcium leached from Cretaceous and Proterozoic bedrocks. Another situation holds fro foamstones of the Čimice-creek which is mostly led trough a brick-walled tunnel. The elvated Ca-content of its water comes not from the rocks but mainly from the mortar of the tunnel and the origin of the foamstone is strongly artificially influenced. Therefore, the proposal to protect these foamstones as natural object is in this special case rather irrational.
