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Origin of regular cavities in European sandstones: field evidence for dissolution of carbonate and silica cement
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SYSNO ASEP 0394176 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Origin of regular cavities in European sandstones: field evidence for dissolution of carbonate and silica cement Author(s) Adamovič, Jiří (GLU-S) RID, SAI, ORCID
Mikuláš, Radek (GLU-S) RID, SAI
Mertlík, J. (CZ)Source Title Sandstone landscapes : diversity, ecology and conservation : proceedings of the 3rd International Conference on Sandstone Landscapes, Kudowa Zdrój (Poland), 25-28 April 2012. - Wrocław : Instytut Geografii i Rozwoju Regionalnego Uniwersytetu Wrocławskiego, 2013 / Migoń P. ; Kasprzak M. - ISBN 978-83-62673-29-2 Pages s. 13-18 Number of pages 6 s. Publication form Print - P Action Sandstone Landscapes (3.) Event date 25.04.2012-28.04.2012 VEvent location Kudowa-Zdrój Country PL - Poland Event type WRD Language eng - English Country PL - Poland Keywords sandstones ; origin of cavities Subject RIV DB - Geology ; Mineralogy R&D Projects IAA300130806 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support GLU-S - RVO:67985831 Annotation The origin of symmetrical cavities of spherical, ellipsoidal or tear-drop shapes in European sandstones is discussed. Based on the field comparison between such cavities in quartzose sandstones and incompletely developed cavities in carbonate-cemented sandstones, it can be demonstrated that the symmetrical cavities form by carbonate dissolution within the limits of former carbonate concretions. The diagnostic features of post-concretionary cavities include their circular or elliptical cross-section, a uniform orientation of their long axes across the region, and the presence of a set of parallel vertical joints or grooves/ribs on their inner walls. In some sandstone areas (e.g., Petite Suisse area in Luxembourg, Kokořín area in the Czech Republic), a wide variety of transitional forms can be found between the cavities and concretions forming positive relief on a vertical cliff face, depending on the position of the carbonate dissolution front in the present landscape. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2014
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