Glauconite

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Glauconite \Glau"co*nite\, n. [Cf. F. glauconite, glauconie, fr.
     L. glaucus. See {Glaucous}.] (Min.)
     The green mineral characteristic of the greensand of the
     chalk and other formations. It is a hydrous silicate of iron
     and potash. See {Greensand}.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  glauconite
       n : a green mineral consisting of hydrated silicate of potassium
           or iron or magnesium or aluminum; found in greensand