Origin of ferruginous
Examples from the Web for ferruginous
In other forms the union of the grains by a calcareous or ferruginous cement necessitates the existence of distinct pylomes.
The sides are covered with ferruginous and sulphurous pyrites and scoriæ, which make the ascent difficult.
I have before mentioned that there are many mineral waters in the island—sulphurous and ferruginous—at Antipolo.
The colors vary from smoky to fuliginous, olive and yellow, and the spores are ferruginous.Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.|George Francis Atkinson
It is incrusted in a mass of ferruginous limestone, and weighs 180 lbs.