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.
A ground rock material that contains potassium and trace elements.
Sable vert Grünsand, m Arena glauconítica A natural, mineral material mined for its content of potassium, which is released very slowly through the natural microbial activity of soil organisms.
Greensand is mined from ancient seabeds; it is a dry organic fertilizer. It is useful for its ability to slowly supply to the soil a number of different micronutrients, as well as potassium.
an olive-green sandstone containing glauconite
A pulverized rock powder of sandy clay that is used to supply potassium, magnesium, and trace minerals to plants.
A natural mineral, primarily composed of complex silicates, which can be coated with manganese oxide to form a catalytic absorptive surface. This surface is used to attract ferrous iron and manganese as well as to adsorb dissolved oxygen which is used to oxidize iron, manganese or hydrogen sulfide.
A naturally-occurring mineral that consists largely of dark greenish grains of glauconite and which possesses ion exchange properties.
A natural mineral, primarily composed of complex silicates, which possess ion exchange properties. (See manganese greensand, zeolite.)
Greensand is an olive-green coloured sandstone rock which is commonly found in narrow bands, particularly associated with bands of chalk and clay worldwide; it has been deposited in marine environments at various times during Earth history, such as during the Jurassic and Cretaceous periods.