The Mines of Colorado, Količina 20S. Bowles, 1867 - 450 strani |
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Zadetki 1–5 od 100
Stran
... lodes and claims upon the choicest silver veins in those districts . Also , Gold Mining Property In Gilpin and Clear Creek Counties , all of which can be well rep- resented by maps taken by actual survey of the respective districts ...
... lodes and claims upon the choicest silver veins in those districts . Also , Gold Mining Property In Gilpin and Clear Creek Counties , all of which can be well rep- resented by maps taken by actual survey of the respective districts ...
Stran vi
... Lodes - 1 Names of Mining Companies - Amount of Development- Condition of Mines and Mills - Machinery - Processes ... Lode A 214 227 263 Mining in the Past , in the Present - Climate vi CONTENTS .
... Lodes - 1 Names of Mining Companies - Amount of Development- Condition of Mines and Mills - Machinery - Processes ... Lode A 214 227 263 Mining in the Past , in the Present - Climate vi CONTENTS .
Stran 50
... lode are called " droppers ; " and when they concentrate and lead into it again , they are called " feeders . " The ... lodes of Colorado have been pronounced true veins by the best authority . Prof. Alfred Du Bois , for three years ...
... lode are called " droppers ; " and when they concentrate and lead into it again , they are called " feeders . " The ... lodes of Colorado have been pronounced true veins by the best authority . Prof. Alfred Du Bois , for three years ...
Stran 51
... worked . They exhibit phenomena which can only be explained by referring their ori- gin to different geological epochs , show displace- ment , cross and intersect each other at all conceiv- THE COLORADO LODES ARE TRUE VEINS . 51.
... worked . They exhibit phenomena which can only be explained by referring their ori- gin to different geological epochs , show displace- ment , cross and intersect each other at all conceiv- THE COLORADO LODES ARE TRUE VEINS . 51.
Stran 55
... lodes . Veins which occur in the erup- tive rocks are seldom of much value . In general the quartz veins may be presumed to have originated at the time of the metamorphic ac- tion on the strata themselves ; and when there are igneous ...
... lodes . Veins which occur in the erup- tive rocks are seldom of much value . In general the quartz veins may be presumed to have originated at the time of the metamorphic ac- tion on the strata themselves ; and when there are igneous ...
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50 feet adit agent arastras Arkansas Arkansas River assays average beds Black Hawk Bobtail California Central City claim Clear Creek County coal Colorado copper County crevice Crosby & Thompson Denver discovery dollars east eastern engine engine-house feet deep feet long fifty five fork four furnace Gold Mining Company Golden City gossan Gregory Gulch head hight hoisting hundred feet inches iron Kansas Kanyon Lake lodes machinery Middle Park miles miners Missouri River Moun Mount Lincoln mouth Nevada pans party Pass Pike's Peak placer mining Plains Platte pyrites Quartz Hill Range rich River rock Rocky Mountains Russell Gulch sandstone silver sluice smelting snow South Boulder South Clear Creek South Park specimens Spring stamp mill stone stream summit Summit County surface tains Territory thick thousand feet timber tion tons town tributaries tunnel twelve twenty Valley vein width Winter yield