Introduction
Periodicals
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
2009/17/1
Pískovce z Pražského hradu a okolí
Pískovce z Pražského hradu a okolí
Jan Šrámek
| Pages | 60-64 |
|---|---|
| Citation | ŠRÁMEK, Jan. Pískovce z Pražského hradu a okolí. Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2009, 17(1), 60-64. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/17-1/piskovce-z-prazskeho-hradu-a-okoli |
Study of eleven pieces of quartz sandstones come from an archaeological collection of Prague´s Castle showed at least two different rocks provenances. Fine greenish - yellowish soft clayey sandstones, which contain also a small portion of calcite and glauconite was designated as „Zápy“ sandstones, which has a short durability, high porosity and low strength. The second groups of whitish - greyish coarser quartz sandstones with higher strength and a small content of kaolinite and illite comes probably from Nehvizdy - Vyšehořovice. Study of further sandstone samples gathered from other various Prague´s outcrops (Strahov, Střešovice, Prosek and Hloubětín) showed, that these soft clayey sandstones could not be used neither as a building material not as a architectural stone.
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