Počet záznamů: 1
Origin of regular cavities in European sandstones: field evidence for dissolution of carbonate and silica cement
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SYSNO ASEP 0394176 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Origin of regular cavities in European sandstones: field evidence for dissolution of carbonate and silica cement Tvůrce(i) Adamovič, Jiří (GLU-S) RID, SAI, ORCID
Mikuláš, Radek (GLU-S) RID, SAI
Mertlík, J. (CZ)Zdroj.dok. 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 Rozsah stran s. 13-18 Poč.str. 6 s. Forma vydání Tištěná - P Akce Sandstone Landscapes (3.) Datum konání 25.04.2012-28.04.2012 Místo konání Kudowa-Zdrój Země PL - Polsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. PL - Polsko Klíč. slova sandstones ; origin of cavities Vědní obor RIV DB - Geologie a mineralogie CEP IAA300130806 GA AV ČR - Akademie věd Institucionální podpora GLU-S - RVO:67985831 Anotace 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2014
Počet záznamů: 1