The influence of run-off water on sandstone surfaces: effects on sandstone microrelief


Radek Mikuláš, Jiří Adamovič, Václav Cílek

Geoscience Research Reports 44, 2011 (GRR for 2010), pages 31–35

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Water running across vertical rock surfaces of porous quartzose sandstone generally shows a protective effect provided that it does not augment frost erosion. The occasionally wetted vertically elongated patches can, after hundreds to thousands years of development, form a positive relief, resembling a rope or an "elephant trunk". Such forms of microrelief were documented in the Bohemian Cretaceous Basin. Sheet-like wetting of large portions of subvertical sandstone cliffs may protect them from the formation of deep shelters at their bases (Zion National Park, USA).