. Transactions. ^^»» 4 Fig. 3.—Biotite-Pyroxene Zone of Dike, 9 Diameters ; OrdinaryLight. Actual Field, 8 mm. Apatite (Ap), Biotite (B),Pyroxene (Py), Magnetite (M).. Fig. 4.—Outer Edge of Dike, 9 Diameters; Ordinary Field, 8 mm. Plagioclase (Pg) is Last Mineral toSeparate. A TITANIFEROUS IRON-ORE DEPOSIT. 19

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries