Landscapes and Landforms of the Czech Republic

0460125 - GLÚ 2017 RIV CH eng M - Monography Chapter
Adamovič, Jiří
The Kokořín Area: Sandstone Landforms Controlled by Hydrothermal Ferruginization.
Landscapes and Landforms of the Czech Republic. Cham: Springer, 2016 - (Pánek, T.; Hradecký, J.), s. 153-164. ISBN 978-3-319-27536-9
R&D Projects: GA ČR(CZ) GA16-19459S
Institutional support: RVO:67985831
Keywords : Kokořín area * Cretaceous sandstones * landforms * hydrothermal activity * ferruginization
OECD category: Geology
https://books.google.cz/books?id=Rui9CwAAQBAJ&printsec=frontcover&hl=cs&source=gbs_ViewAPI&redir_esc=y#v=onepage&q&f=false

The area between the Jizera and Elbe rivers in north-central Bohemia features a southerly dipping package of sedimentary rocks of Cretaceous age, subjected to modest uplift throughout the Quaternary. The Kokorin sandstone (Middle to Upper Turonian) comprises five superimposed bodies with generally high permeability and low-to-medium resistance to weathering. Most valleys are dry, shaped by occasional flash floods and gravitational processes. Disintegration of vertical cliff faces is dominated by salt weathering. Specific landforms develop on sandstones cemented by iron oxyhydroxides of hydrothermal origin. These form thin (centimetres to metres), sheet-like bodies, either subvertical or bedding-parallel, and give rise to structural plateaus and mesas, steep erosional ridges and mushroom rocks. The variety of small-scale relief forms on ferruginous sandstone is unique at a global scale. The highest elevations in the landscape are formed by exhumed subvolcanic bodies. The Kokorin Area is a perfect example of a sandstone-dominated erosional landscape whose high relief complexity is largely due to the contrasting resistance of rocks to weathering.
Permanent Link: http://hdl.handle.net/11104/0260257