Found 2 items, similar to marlstone.
English → English (WordNet) Definition: marlstone marlstone n : metamorphic rock with approximately the same composition as marl [syn: marlite]
English → English (gcide) Definition: Marlstone Marlstone \Marl"stone`\, n. (Geol.) A sandy calcareous straum, containing, or impregnated with, iron, and lying between the upper and lower Lias of England. [1913 Webster]