This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...material are of comparatively limited extent, but a few feet in width, though they may be reaching to a depth beyond practical mining. The bodies of good, gritless material wedge out, often quite abruptly, and become interleaved with harder, amphibolic and chloritic minerals, wholly without discernable law or system. ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...material are of comparatively limited extent, but a few feet in width, though they may be reaching to a depth beyond practical mining. The bodies of good, gritless material wedge out, often quite abruptly, and become interleaved with harder, amphibolic and chloritic minerals, wholly without discernable law or system. Small cross veins sometimes occur, which are filled with light-green, foliated talc. Such are, however, too small to be taken into account in working. The mining is carried on by a system of comparatively shallow open trenches which are abandoned when through the presence of water or deterioration of product they became unprofitable. The material found near Wiehle and Hunter's Station is used largely in foundry work. 1 Fifteenth Annual Report of the State Geologist of New York, 1895. The Carolinas.--In western North Carolina and northern Georgia, particularly in Cherokee and Swain counties in the first-named State, and in the Cohutta Mountains of Murray County in the last, are numerous beds of very clean white or greenish fibrous talc occurring in part, at least, in connection with the marble beds. Some of the material is soft, white, and almost translucent, while other is tough and semi-translucent, horn-like. The beds are mostly very irregular in extent as well as in quality of material. According to Dr. Pratt the talc formation begins in Swain County about six miles east of the Valley River Mountains, following up the valley of the Nantehala to near the Macon County line, whence it ascends Nelson Creek ravine, crossing the mountain at Red Marble Gap. Entering Cherokee County it then follows Valley River, crossing it and the Hiawassee near Murphy and following thence the Nottely River Valley into Georgia. The country rock of the talc region i...
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1910. John Wiley (USA)/Chapman & Hall. Second. Hard Cover. Book-VG, gilt titles on spine. 9x6. 432pp. Frontis, 37 b/w plates, 55 b/w illus. Ex-libris-Queen Mary College, University of London. A detailed account of the occurrence of non-metallic minerals in the United States of America at the beginning of the twentieth century, and the uses to which these minerals were put.