VEIN QUARTZ PSEUDOMORPHS OF CROSS-FIBER ASBESTOS IN VIRGINIA Lrucor,N R. Trlnsunvnn, Harttard, ()ni'aersity, Cambridge, Mass' CoNrBNrs
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چکیده
CoNrBNrs Introduction. The Fibrous Habit. . . . . . Fibrous Quartz a Rare Phenomenon?. . . .. . Significance of Fibrous Quartz Veins in Virginia. The Virginia Deposits. Distribution, Size and Character of the Veins. Nature of the Wallrocks. Replacement Origin of the Original Asbestos Veins. . Character of the Pseudomorphous Qtaftz. Evidences of Secondary Introduction and Replacement origin of the Fibrous
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