Report of the State Mineralogist, 16. izdajaState Office, 1919 |
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Zadetki 1–5 od 100
Stran 2
... Granite Lead Miscellaneous Year Pounds Value Cubic feet Silver , value Stone , value Value Pounds Value Amount , ( tons ) Kind Value 1880 $ 2,702,362 $ 70,144 1881 3,700,000 9,500 1882 3,500,000 10,000 1883 3,000,000 8,000 1884 ...
... Granite Lead Miscellaneous Year Pounds Value Cubic feet Silver , value Stone , value Value Pounds Value Amount , ( tons ) Kind Value 1880 $ 2,702,362 $ 70,144 1881 3,700,000 9,500 1882 3,500,000 10,000 1883 3,000,000 8,000 1884 ...
Stran 5
... Granite Hill ( 1851 ) , Eureka ( 1851 ) , Osborne Hill ( 1851 ) , Union Hill ( 1850 ) . In the Nevada City district , the Providence and Merrifield veins were discovered and opened in 1851 . As has been stated before , owing to the ...
... Granite Hill ( 1851 ) , Eureka ( 1851 ) , Osborne Hill ( 1851 ) , Union Hill ( 1850 ) . In the Nevada City district , the Providence and Merrifield veins were discovered and opened in 1851 . As has been stated before , owing to the ...
Stran 11
... granites south of Granite- ville , striking approximately north and south . The gravel deposits are in the immediate vicinity of the village . Bibliography . Lindgren , W. , Tertiary Gravels of the Sierra Nevada , Prof. Paper No. 73 , p ...
... granites south of Granite- ville , striking approximately north and south . The gravel deposits are in the immediate vicinity of the village . Bibliography . Lindgren , W. , Tertiary Gravels of the Sierra Nevada , Prof. Paper No. 73 , p ...
Stran 12
... granite peaks reaches an elevation of 6600 ' . Geology . The Blue Cañon slates are the oldest known rocks in the Graniteville region , they being of Carboniferous age . They were folded and eroded at the end of the Paleozoic and again ...
... granite peaks reaches an elevation of 6600 ' . Geology . The Blue Cañon slates are the oldest known rocks in the Graniteville region , they being of Carboniferous age . They were folded and eroded at the end of the Paleozoic and again ...
Stran 13
... granite , and none have been very productive . The veins of the western group do not appear to be so continuous ... granite contact ; and the California , or Gaston , occur- ring at the contact . The main Gaston vein has been followed to ...
... granite , and none have been very productive . The veins of the western group do not appear to be so continuous ... granite contact ; and the California , or Gaston , occur- ring at the contact . The main Gaston vein has been followed to ...
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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