marmarosis (marmarosis)

[ One of the most remarkable examples of marmarosis is the alteration of the (Tria ic) limestone of Carrara into the well-known statuary marble. A. Geikie, Text-Book of Geol. (2d ed.), p. 561. marmatite (mär'ma-tīt), n. [F. marmatite ; as Marmato (see def.) + -ite 2.] A variety of sphalerite or zinc sulphid, containing considerable iron, and hence of a black color. The original, found at Marmato, near Popayan, in Colombia, contained 23 per cent. of sulphate of iron.