. Transactions. Fig. 7 (A).. Fig. 8 (B).Photomicrographs of Thin Sections of Sulphide Ore from Austin villeMines, Wythe County. Magnified 50 Diameters ; Cross areas represent sulphide minerals. Shows crystalline character oflimestone and its replacement by the sulphides. Re-entrant angles alongmargins of the sulphides and the spider-like arrangement of the sulphideareas, as a whole, are well shown. 698 LEAD- AND ZINC-DEPOSITS VIRGINIA-TENNESSEE REGION. 2. The Oxidized Ores.—Where sufficient developments havebeen made, as in the mines of Wythe county, Va., the oxidizedores usually

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. Transactions. Fig. 7 (A).. Fig. 8 (B).Photomicrographs of Thin Sections of Sulphide Ore from Austin villeMines, Wythe County. Magnified 50 Diameters ; Cross areas represent sulphide minerals. Shows crystalline character oflimestone and its replacement by the sulphides. Re-entrant angles alongmargins of the sulphides and the spider-like arrangement of the sulphideareas, as a whole, are well shown. 698 LEAD- AND ZINC-DEPOSITS VIRGINIA-TENNESSEE REGION. 2. The Oxidized Ores.—Where sufficient developments havebeen made, as in the mines of Wythe county, Va., the oxidizedores usually show much richness, and they are often concen-trated in massive form as large irregular masses and layers.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries