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current | 03:37, 2 April 2012 | | 1,400 × 843 (482 KB) | Tillman | {{Information |Description ={{en|1=Polished slab of granodiorite showing sheeted zone of carbonate veinlets, North Star mine, No. 1 vein, 7,200-foot level. Nevada County, California. 1931. Plate 10-A, U.S.Geological Survey Professional paper 194. 1... |
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