5 definitions found for Greensand

greensand n 1: an olive-green sandstone containing glauconite

greensand noun Date: 1699 a sedimentary deposit that consists largely of dark greenish grains of glauconite often mingled with clay or sand

greensand
n.
1 a greenish kind of sandstone, often imperfectly cemented.
2 a stratum largely formed of this sandstone.

greensand n. 1 a greenish kind of sandstone, often imperfectly cemented. 2 a stratum largely formed of this sandstone.

Greensand Green"sand` (-s?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. 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.