greensand


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to greensand: manganese greensand

greensand

[′grēn‚sand]
(geology)
A greenish sand consisting principally of grains of glauconite and found between the low-water mark and the inner mud line.
(materials)
A highly siliceous sand that contains small amounts of magnesia and alumina, with about 8% of its bulk in powdered coal or charcoal; dampened with water to make foundry molds.
(petrology)
Sandstone composed of greensand with little or no cement.

greensand

A resin used to oxidize the soluble iron in water and then to filter it out.
References in periodicals archive ?
Greensand filtration is designated as an applicable technology for achieving combined radium maximum permissible concentrations.
Penrose (1889) located it downstream of "indurated greensand in the river--small shoal--dip horizontal", which is descriptive of a small falls across the river formed by a bed of indurated glauconitic sandstone (Locality 9).
Manganese Greensand has been the industry standard for this type of treatment for more than 50 years.
An insulated truck-trailer was equipped with different forms of treatment processes, including manganese greensand filtration, ozonation, UV-filtration and membranes.
Add 1 tablespoon each of blood meal for nitrogen, kelp for trace elements, and greensand for potassium; then add 2 tablespoons of bone meal for phosphorus.
Each 11-gram tea bag holds a precise blend of mineral-rich kelp, fish-bone meal, greensand, powdered organic vegetables and herbs.
3 and the Tornillo water storage tank, and includes two parallel 600-gpm sand separators, a chlorine detention tank and two arsenic removal units equipped with anthracite, a Greensand Plus filtration process and gravel.
It provides reuse of up to 90% sand and also is included in our Greensand to Core Room system.
The fossil was unearthed from the Cretaceous Cambridge Greensand of eastern England, revealing that the pterosaur lived around 100 million years ago during what is known as the Albian stage.

Full browser ?