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more about greensand
greensand |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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. From WordNet r 1.6 [wn]: greensand n : an olive-green sandstone containing glauconite
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