'Marlstone' definitions:
Definition of 'marlstone'
(from WordNet)
noun
Metamorphic rock with approximately the same composition as marl [syn: marlite, marlstone]
Definition of 'Marlstone'
From: GCIDE
- 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]