greensand
(noun) an olive-green sandstone containing glauconite
Source: WordNet® 3.1
greensand (countable and uncountable, plural greensands)
(geology) A greenish sandstone containing glauconite.
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Source: Wiktionary
Green"sand` (-s, n. (Geol.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
2 May 2025
(noun) excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
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