Conditions for limestone pavements are created when an advancing
glacier scrapes away overburden and exposes horizontally
bedded limestone, with subsequent
glacial retreat leaving behind a flat, bare surface. Limestone is slightly
soluble in water and especially in acid rain, so corrosive drainage along joints and cracks in the limestone can produce slabs called
clints isolated by deep fissures called
grikes or
grykes (terms derived from a
northern English dialect). If the grykes are fairly straight and the clints are uniform in size, the resemblance to man-made paving stones is striking, but they are not necessarily so regular. Limestone pavements that develop beneath a mantle of
topsoil usually exhibit more rounded forms. ==Notable examples==