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Details of vug lining. Nevada County, California. 1931.


Date Taken


Details of vug lining: thin section of vug filling; euhedral quartz is surrounded by a vein of ankerite (dark) and a vein of smaller quartz combs (light). At that stage the vug lining was disturbed, and some of the euhedral quartz crystals were broken. Finally a mixture of chlorite and mechanically ground quartz cemented by ankerite filled the entire vug and formed a matrix around the earlier combs, North Star mine, No. 2 vein, 6,300-foot level. Crossed nicols. Nevada County, California. 1931. Plate 16-B, U.S.Geological Survey Professional paper 194. 1940.


Data Owner :
U.S. Geological Survey
Photographer :
Johnston, William Drumm

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Type Scheme Key
name photoLibrary jwdj0299
number photoLibrary 20006
batch photoLibrary btch294
number_in_book photoLibrary 299

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