glauconite

glauconite has 2 senses in the JumbleFix dictionary. Letters: 10.

Definitions

• n.. The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand.
• n.. a green mineral consisting of hydrated silicate of potassium or iron or magnesium or aluminum; found in greensand