Thesaurus: greensand

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1. n. 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.
2. n. an olive-green sandstone containing glauconite
3. 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: Greensand is often called marl, because it is a useful fertilizer. The greensand beds of the American Cretaceous belong mostly to the Upper Cretaceous.
4. A variety of sandstone, usually imperfectly consolidated,consisting largely of glauconite, a silicate of iron and potash of agreen color, mixed with sand and a trace of phosphate of lime.
5. n. an olive-green sandstone containing glauconite