“…He ascribed small anticlinal ridges in "Corniferous" limestone in Genessee County, New York, to sinking of blocks due to solution at depth of salt and gypsum. This is certainly an early recognition of solution at depth reflected in surface features, as noted by Wallach and Prucha (1979). The existence of such features due to solution of salt at depth is now widely known and taken into account in engineering works (Christiansen 1967(Christiansen , 1970.…”