. Transactions. Fig. 2.—Coarse-Gkained Gabbro, 18 Diameters; Polarized Light ;NicoLS Crossed. Actual Field, 4 mm. 18 A TITANIFEROUS IRON-ORE DEPOSIT. I. ^^»» 4 Fig. 3.—Biotite-Pyroxene Zone of Dike, 9 Diameters ; OrdinaryLight. Actual Field, 8 mm. Apatite (Ap), Biotite (B),Pyroxene (Py), Magnetite (M).

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries