greensand


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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

greensand

A resin used to oxidize the soluble iron in water and then to filter it out.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The Gault clay formation in the studied area consists of siliciclastic shales deposited in an open marine environment at the maximum flooding surface [25] from Middle to Upper Albian (Lower Cretaceous) on the Greensands formation [26] (Figure 1).
Lithologically the allochthonous rocks are mostly composed of sandstone, siltstone, greensand, siliceous mudstone, argillaceous micritic limestone and rare coal measures along with dispersed organic matter.
Processes using manganese greensand or manganese oxide coated media are relatively inexpensive techniques for radium removal [29].
The oxidation process that causes iron to precipitate before the contact of Manganese Greensand can be seen in the following reaction:
Her formula for feeding annual and perennial plants is two parts alfalfa meal, one part rock phosphate and one part greensand.
"Different parts of the farm are on clay, chalk and greensand, and we have a private water supply that comes straight off the chalk.
They are available in six heritage colours including Sussex Emerald, Greensand, Chalkhill Blue, Yew Tree, Downland Stone and Wood Sage and offer a multitude of personalised internal options.
Like much of the rest of the AONB, which stretches over the North Downs and the Greensand Hills, this site sits in an idyllic area of pine woodland on top of sandy hillside, a surprisingly wild and untamed landscape that has been largely left to forestry and grazing because the 'poor' soil wasn't suitable for intensive farming.
The geometry of the cast metal and the greensand mold is illustrated in Figure 1(a), which is represented in three-dimensions.
Add slow-release rock powders and mined mineral deposits such as greensand, azomite, colloidal rock phosphate, and lime if soil tests suggest a need for amendment.
Colour: Shadesrange from bright yellows, greensand blues to albinos.

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