Abbreviation Explanation SLS Strelec Locked Sand F Overburden load Ssat Cross-section area of landform TS Tensile strength of surface TSa TS measured on sandstone exposures under ambient humidity TSa (DR) TSa derived from drilling resistance measurements TSd TS measured at unconfined SLS cubes, which were oven-dried TSs TS measured at unconfined SLS cubes, which were fully immersed by water in normal atmospheric pressure TSs V TS measured at unconfined SLS cubes, which were fully immersed by water in reduced pressure (2 kPa) TSs L TS measured at uniaxially loaded SLS cubes, which were fully immersed by water in normal atmospheric pressure W/E Weathering/Erosion Sandstone landforms shaped by negative feedback between stress and erosion