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Finely laminated lustrous manganite shown on polished surfaces of four specimens from Compton mine near Compton. Page County, Virginia. 1918.

Dates

Date Taken
1918

Summary

Psilomelane and manganite: Concentric layers of dense psilomelane (dark bands) and finely laminated lustrous manganite (lighter bands) shown on polished surfaces of four specimens from Compton mine near Compton: S : Sandstone. M manganite P psilomelane. In B the fact that the dense psilomelane between the portion banded by manganite and sandstone walls is a replacement of the sandstone is shown by enclosed quartz grains at its border as in g. In C replacements of both sandstone walls of crevice by psilomelane is shown by quartz grains only. Natural size. Page County, Virginia. 1918. Plates 8-B and C in U.S. Geological Survey Bulletin 737. 1923.

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U.S. Geological Survey

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Type Scheme Key
name photoLibrary sgw01416
number photoLibrary 33374
batch photoLibrary btch402
number_in_book photoLibrary 1416

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