Greensand

Greensand or Green sand is either a sand or sandstone, which has a greenish color. This term is specifically applied to shallow marine sediment, that contains noticeable quantities of rounded greenish grains. These grains are called glauconies and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite mica. Greensand is...
Found on http://en.wikipedia.org/wiki/Greensand

Greensand

• (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.
Found on http://thinkexist.com/dictionary/meaning/greensand/

greensand

<geology> A variety of sandstone, usually imperfectly consolidated, consisting largely of glauconite, a silicate of iron and potash of a green colour, mixed with sand and a trace of phosphate of lime. ... Greensand is often called marl, because it is a useful fertiliser. The greensand beds of the American Cretaceous belong mostly to the Upper...
Found on http://www.encyclo.co.uk/local/20973

greensand

(from the article `geochronology`) D`Omalius mapped and described a local succession in western France. While doing so, he began to recognize a common sequence of soft limestones, ... ...currents and the removal of the lighter constituents. Such placer sands may be economically valuable deposits worked for diamonds and other ... [2 r...
Found on http://www.britannica.com/eb/a-z/g/68

Greensand

Green'sand` (-s...nd`) noun (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. » Greensand is often called marl , because it is a u...
Found on http://www.encyclo.co.uk/webster/G/56

Greensand

A ground rock material that contains potassium and trace elements.
Found on http://urbanext.illinois.edu/veggies/glossary.cfm

Greensand

A natural source of potassium containing about 7% potash plus 32 trace elements.
Found on https://extension.umd.edu/hgic/resource-library/vegetable-gardening-glossar

Greensand

A sediment composed of grains of glauconite mingled with clay or sand used as an organic fertilizer. It contains about twenty-two trace minerals including potash, silica, iron oxide, magnesia, lime, and phosphoric acid. Mined in Florida, once the ocean floor. Roses and tomatoes love it. The material will prolong fruiting and loosen heavy clay soils...
Found on http://www.encyclo.co.uk/local/20077

Greensand

an organic source of potassium. About 7% potash plus 32 trace elements.
Found on http://www.encyclo.co.uk/local/20003

Greensand

Greensand is a variety of sandstone, usually imperfectly consolidated, consisting largely of glauconite, a silicate of iron and potash of a green colour, mixed with sand and a trace of phosphate of lime. Greensand is often called marl, because it is a useful fertilizer. The greensand beds of the American Cretaceous belong mostly to the Upper Cretac...
Found on http://www.probertencyclopaedia.com/browse/HG.HTM

greensand

[n] - an olive-green sandstone containing glauconite
Found on http://www.webdictionary.co.uk/definition.php?query=greensand
No exact match found