Podrobnosti záznamu

Název
    Origin of regular cavities in European sandstones: field evidence for dissolution of carbonate and silica cement
Autor
    Adamovič, Jiří
    Mertlík, J.
    Mikuláš, Radek
Konference
    Sandstone Landscapes (3. : 25.04.2012-28.04.2012 : Kudowa-Zdrój, Polsko)
Jazyk
    anglicky
Typ dokumentu
    konferenční příspěvek (zahraniční konference)
Zdrojový dokument - monografie
    Sandstone landscapes : diversity, ecology and conservation : proceedings of the 3rd International Conference on Sandstone Landscapes, Kudowa Zdrój (Poland), 25-28 April 2012
Strany
    S. 13-18
Poznámky
    Projekt: IAA300130806, GA AV ČR3cav_un_auth*0241228
    Rozsah: 6 s. : P
Předmětová kategorie
    origin of cavities
    sandstones
Klíčové slovo
    Carbonate
    Cavities
    Cement
    Dissolution
    European
    Evidence
    Field
    Origin
    Regular
    Sandstones
    Silica
Abstrakt (anglicky)
   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.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    23. 10. 2014