Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Zápy sandstone (Central Bohemia)


Jan Šrámek

Geoscience Research Reports 39, 2006 (GRR for 2005), pages 167–169

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Thanks to its physical character, fine structure, high content of mica and clay minerals as well as a good homogeneity, bluish-greenish Zapy sandstone became a very popular and easily workable building and figural stone. However, due to high 29-33 % porosity, more then 10 % content of mica and clay minerals (chlorite, muscovite, sericite, glauconite, and kaolinite), and omnipresence of a small amount of micritic calcite, which react with S03 and water, very quick deterioration of the stone proceeded.