Genesis of the Zinc Ores of the Edwards District St Lawrence County Ny
Genesis of the Zinc Ores of the Edwards District St Lawrence County Ny
Charles Henry Smyth
The book Genesis of the Zinc Ores of the Edwards District St Lawrence County Ny was written by author Charles Henry Smyth Here you can read free online of Genesis of the Zinc Ores of the Edwards District St Lawrence County Ny book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Genesis of the Zinc Ores of the Edwards District St Lawrence County Ny a good or bad book?
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The frequent presence of veins of serpentine passing, from the central mass of serpentine, out through the surrounding sulphides seems, at first glance, to point definitely to serpentinization after deposition of sulphides. But on closer examination it becomes evident that the serpentine of these veins is often not continuous 24 NEW YORK STATE MUSEUM with that of the central mass, but is separated from it by a faint but sharp marginal line, which materially weakens this evidence. The presence o...f abundant cracks in the sulphides suggests yield- ing to the expansive force of growing serpentine and^ consequently, the earlier formation of the sulphides. These cracks, however, are not radial around serpentine grains but commonly occur in parallel systems traversing the whole width of sections, without reference to serpentine. Furthermore, it very often happens that, under the strain that has produced these cracks, a core has separated from the adjacent sulphide and the intervening space has been filled with the vein serpentine.
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