greensand

Noun

Meaning

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.

Source: Webster's dictionary

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Additional evidence of the structure of the head in ornithosaurs from the Cambridge Upper Greensand; being a supplement to "The Ornithosauria." Source: Internet

Hills in the form of the North Downs and the Greensand Ridge span the length of the county and in the series of valleys in between and to the south are most of the county's 26 castles. Source: Internet

The Vale of Pewsey has been cut through the chalk into Greensand and Oxford Clay in the centre of the county. Source: Internet

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