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  • Identification of experimental quartz microdebitage from rock engravings
  • are compared with coastal dune sands, weathered building stone in Sydney, and soil material from an arid region, Broken Hill area, where numerous rock engravings are found. In all cases, comparisons are made between quartz grains : roundness of quartz grains
  • Carbonate rock ; England ; Experimentation ; Fracture ; Freeze-thaw cycle ; Limestone ; Microstructure ; Moisture ; Porosity ; Salt ; United Kingdom ; Weathering
  • rock deterioration mechanisms taking place. It is concluded that the 5 limestones not only show a wide range of resistance to weathering in general but considerable difference in resistance to particular weathering processes.
  • composition, colour and Vickers microhardness. The relationships between these rock properties and weathered depth were used to examine the mechanism of weathering-rind formation.
  • Weathering experiments are reported combining frost and a range of salts that occur widely on sandstone rock outcrops in western and central Europe. The effects of alunogen, gypsum, halite and alum salts are examined, both singly and in combination
  • with the solubility of the main rock-forming minerals.