EntityQ885499· pop 19· linked from 221 articlesblowholeSign in to savegeological phenomenon, holes in coastal rock formations through which sea water is forced by the tide or waves.ConnectionsbayEntityriver deltaEntityBeach evolutionEntityAustraliaCountrySri LankaCountryBarbadosCountrySamoaCountryislandEntitygeologyEntitygeometryEntityInternational Standard Book NumberEntityNew South WalesEntitysandEntitypeninsulaEntityarchipelagoEntitystraitEntitybeachEntityclayEntitytideEntitydigital object identifierEntityCategoriesBlowholesCave geologyCoastal and oceanic landformsCoastal geography