 more or less mixed with green talc; and these plates, which somewhat resemble the " combs " of ordinary lodes, are either in contact or separated from each other by intercalated layers of talcose slate. The quartz is chiefly developed in the central portion...  Journal - Page 64by Royal Institution of Cornwall - 1889Full view - About this book
 | United States. Census Office - 1885 - 818 pages
...up of irregularly parallel platen of white compact quartz and crystalline dolomite or magnesite (6) more or less mixed with green talc; and these plates,...in the central portion of the vein ; and, from its color and resistance to decomposition, it gives rise to a very conspicuous outcrop, forming the crest... | |
 | United States. Census Office. 10th Census, 1880 - 1885 - 576 pages
...of irregularly parallel plate« of white compact quartz and crystalline dolomite or uiagnesite(i>) more or less mixed with green talc; and these plates,...separated from each other by intercalated layers of talcoee slate. The quartz is chiefly developed in the central portion of the vein; and, from its color... | |
 | Clement le Neve Foster - 1905 - 844 pages
...lode is made up of irregularly parallel plates of white compact quartz and crystalline niagnesite, more or less mixed with green talc; and these plates,...separated from each other by intercalated layers of talcoso slate. The quartz is the auriferous portion of the lode, although it is far from being uniformly... | |
 | United States. Census Office, Samuel Franklin Emmons, George Ferdinand Becker - 1991 - 584 pages
...up of irregularly parallel plate» of white compact quartz aud crystalline dolomite or magnesite (4) more or less mixed with green talc; and these plates,...in the central portion of the vein ; and, from its color and resistance to decomposition, it gives rise to a very conspicuous outcrop, forming the crest... | |
| |
