Report of the State Mineralogist, 16. izdajaState Office, 1919 |
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acres adit adjoins Alleghany amphibolite andesite arsenopyrite automobile road average bedrock Bibliography Calaveras formation Cañon chalcopyrite channel City Mining District Colfax copper Creek Crescent Mills crosscut deposit depth developed diabase diorite dips Downieville drift driven Elevation Feather River feet Folio 66 foot-wall Fork Feather River Genesee Gibsonville granite granodiorite Grass Valley Grass Valley district hanging wall Hill Honey Lake hydraulic Indian Valley Lindgren Location lode miles by road miles east miles north miles northeast miles south miles southwest Mineral Mining Company Neocene Nevada City N. C. N. G. R. R. Nevada County North Fork North Star northwest occurs outcrop Paper 73 placer porphyry Port Wine property consists proven length pyrite quartz quartz veins Quincy Ranch ridge rock schist serpentine Sierra City slate southeast stoped strikes sulphides surface Survey Folio 37 Survey Prof Tertiary thence tunnel U. S. Geol Valley Mining District width Yuba River