 | Royal Geological Society of Cornwall - 1871 - 794 σελίδες
...13° S. of W. Tavistock,&c 9° S. of W. Mean 4° S. of W. HBNWOOD, Cornwall Geol. Tram, vp 250. t " On Keweenaw Point one system of veins is well defined....this course, which is at nearly right angles to the formation."—FOSTER & WHITNEY, Geological Report on the Lake Superior Land District, ip 167. " Dans... | |
 | Royal Geological Society of Cornwall - 1871 - 776 σελίδες
...defined. Their bearing ii north of west—the mean of several observations giving north 21J west. 80 true is this, that no permanently productive vein...this course, which is at nearly right angles to the formation."—FOSTER & WHITNBT, Geological Report on the Lake Superior Land District, ip 167. " Dans... | |
 | William Jory Henwood - 1871 - 766 σελίδες
...S. of W. Tavistock, &c 9° S. of W. Mean 4° S. of W. HBKWOOD, Cornwall Geol. Trant, vp 250. t " On Keweenaw Point one system of veins is well defined. Their bearing is north of west— the mean of several observations giving north 21 J west. So true is this, that no permanently... | |
 | David J. Krause - 1992 - 308 σελίδες
...system of veins. It had a bearing of about twenty degrees west of north, and was so clearly defined that "no permanently productive vein has been discovered...this course, which is at nearly right angles to the formation."9 In 1854 Whitney published his important book, The Metallic Wealth of the United States,... | |
 | 1849 - 858 σελίδες
...is proportionately «в.. Veins of Keweenaw Point. — On Keweenaw Point, one system of veins )urse, which is at nearly right angles to the formation, or axis of uphea*l. These veins, iu their downward course, deviate more or less from perpendicular, amounting... | |
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Their bearing is north of west—the mean of several observations giving north 21} west. So true is this, that no permanently productive vein has been discovered thus far which varied 15... 