'Greensand' definitions:
Definition of 'greensand'
(from WordNet)
noun
An olive-green sandstone containing glauconite
Definition of 'Greensand'
From: GCIDE
- Greensand \Green"sand`\ (-s[a^]nd`), n. (Geol.) A variety of sandstone, usually imperfectly consolidated, consisting largely of glauconite, a silicate of iron and potash of a green color, mixed with sand and a trace of phosphate of lime. [1913 Webster]
- Note: [hand]Greensand is often called marl, because it is a useful fertilizer. The greensand beds of the American Cretaceous belong mostly to the Upper Cretaceous. [1913 Webster]