greensandPronunciation: /ˈgriːnsand/Definition of greensand noun [mass noun] Geology a greenish kind of sandstone, often loosely consolidated. (usually the Greensand) a stratum largely composed of greensand, deposited during the Cretaceous period and often underlying chalk: the Upper Greensandgreensand in other Oxford dictionaries Definition of greensand in the US English dictionary
