Definitions for "Greensand"
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 Gr√ľnsand, m Arena glaucon√≠tica A natural, mineral material mined for its content of potassium, which is released very slowly through the natural microbial activity of soil organisms.