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" frost-drift " is well illustrated by the conditions that prevail throughout this region. The unaltered rock appears at Stony Point at a depth of 26 feet and is unusually hard, especially the walls of the gem-bearing pockets. An exceptionally clear and... "
History of the Gems Found in North Carolina - Seite 33
von George Frederick Kunz - 1907 - 60 Seiten
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Bulletin, Ausgaben 9-12

1895 - 516 Seiten
...circumstances it is easy to find the sources of minerals discovered on the surface. Prof. Washington C. Ken's theory of the "frost-drift" is well illustrated by...hard, especially the walls of the gem-bearing pockets. 38 HISTORY OF THE GEMS FOUND IN NORTH CAROLINA. developer of the first emerald mine in this country,...
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History of the Gems Found in North Carolina

George Frederick Kunz - 1907 - 132 Seiten
...circumstances it is easy to find the sources of minerals discovered on the surface. Prof. Washington C. Kerr^B theory of the "frost-drift" is well illustrated by...the first emerald mine in this country, William E. Hidden,' in 1881, and we cannot do better than quote his words. He writes : Sixteen years ago, the...
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Mineral Resources of the United States

United States. Bureau of Mines - 1892 - 1086 Seiten
...it is easy to find the sources of minerals discovered on the surface. The unaltered rock was found at Stony Point at a depth of 26 feet and is unusually...hard, especially the walls of the gem-bearing pockets. The Emerald and Hiddenite Mining Company was organized in 1881 to work the property at Stony Point,...
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Mineral Resources of the United States

1892 - 884 Seiten
...it is easy to find- the sources of minerals discovered on the surface. The unaltered rock was found at Stony Point at a depth of 26 feet and is unusually...hard, especially the walls of the gem-bearing pockets. The Emerald and Hiddenite Mining Company was organized in 1881 to work the property at Stony Point,...
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Mineral Resources of the United States

1892 - 880 Seiten
...it is easy to find ihe sources of minerals discovered on the surface. The unaltered cock was found at Stony Point at a depth of 26 feet and is unusually hard, espeeially the walls of the gem-bearing pockets. The Emerald and Hiddenite Mining Company was organized...
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