Virgilina district. 3. The rocks are pre-Cambrian in age and represent an area of ancient volcanics similar to others described as occurring along the Atlantic Coast region from eastern Canada to Georgia and Alabama and in the Lake Superior region. 4.... Bulletin of the Geological Society of America - Seite 362von Geological Society of America - 1902Vollansicht - Über dieses Buch
| 1904 - 524 Seiten
...rocks of the area here described have been greatly altered through pressure and chemical metamorphim, as indicated in the prevailing secondary schistose...glance and bornite, without chalcopyrite and pyrite. e 27 Volume XII. i BULLETIN . OF THE SCIENTIFIC LABORATORIES OK DENISON UNIVERSITY. EP1TKD BY THOMAS... | |
| 1904 - 516 Seiten
...Papers, Bulletin No. 86, US Geol. Siirvry. ' Op. cit. • Op. cit. « Op. cit. » Op. cit. • Op. cit. applied to many areas of greatly altered massive and...fissure veins, and the ore is glance and bornite, withput chalcopyrite and pyrite. BULLETIN OF THE SCIENTIFIC LABORATORIES OF DENISON UNivEiSiTY^, T,... | |
| Geological Society of America - 1902 - 758 Seiten
...rocks of the area here described have been greatly altered through pressure and chemical metaraorphism, as indicated in the prevailing secondary schistose...glance and bornite, without chalcopyrite and pyrite. » Van Hi»e, CH: Correlation Papers, Bulletin no. 86, US Geol. Survey. f Op. cit. J Op. cit. ( Op.... | |
| 1903 - 692 Seiten
...— and small amounts of others. The alteration has advanced sufficiently far in the schistose phase to destroy in most cases the original structure and...glance and bornite, without chalcopyrite and pyrite." Seven analyses by the author aid the text, and numerous others are quoted in comparison. WF HlLLEBRAND.... | |
| Thomas Chrowder Chamberlin - 1904 - 1038 Seiten
...elastics. All are collectively referred to as greenstones, and are thought to be similar to greenstones described as occurring along the Atlantic coast region from eastern Canada to Georgia, and from Alabama to the Lake Superior region. ARTHUR KEITH. "Geology of the Piedmont Plateau Area of the... | |
| Thomas Chrowder Chamberlin - 1904 - 818 Seiten
...elastics. All are collectively referred to as greenstones, and are thought to be similar to greenstones described as occurring along the Atlantic coast region from eastern Canada to Georgia, and from Alabama to the Lake Superior region. ARTHUR KEITH. "Geology of the Piedmont Plateau Area of the... | |
| Charles Richard Van Hise, Charles Kenneth Leith - 1909 - 956 Seiten
...elastics. All are collectively referred to as greenstones, and are thought to be similar to greenstones described as occurring along the Atlantic coast region from eastern Canada to Georgia and from Alabama to the Lake Superior region. See summaries of work of Walcott, Keith, and others under... | |
| Geological Survey (U.S.) - 1909 - 1014 Seiten
...elastics. All are collectively referred to as greenstones, and are thought to be similar to greenstones described as occurring along the Atlantic coast region from eastern Canada to Georgia and from Alabama to the Lake Superior region. See summaries of work of Walcott, Keith, and others under... | |
| Sidney Paige - 1911 - 718 Seiten
...are intimately associated with the corres]H>iid'mg volcanic elastics. Furthermore, the popular inline "greenstone," applied to many areas of greatly altered...which contain workable copper deposits. The veins are described as true fissure veins, and the ore is glance and bornite, without chalcopyrite and pyrite.... | |
| Geological Survey (U.S.) - 1911 - 188 Seiten
...an original basic eruptive rock type, has equal application to the existing rocks of the Virgiliua district. 3. The rocks are pre-Cambrian in age and...which contain workable copper deposits. The veins are described as true fissure veins, and the ore is glance and bornite, without chalcopyrite and pyrite.... | |
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