Biennial Report of the Topographic and Geologic Survey of Pennsylvania PDF Download
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 258
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 258
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Author:
Publisher: Forgotten Books
ISBN: 9780266080688
Category : Business & Economics
Languages : en
Pages : 250
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Book Description
Excerpt from Biennial Report of the Topographic and Geologic Survey of Pennsylvania: For the Two Years Ending June 1, 1914 A general summary of the work accomplished and in progress Will he found in the report of the State Geologist, herewith sub witted. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Geological Survey of Pennsylvania
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 532
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![First[-sixth] Annual Report on the Geological Survey of Pennsylvania PDF](https://books.google.com/books/content/images/frontcover/ubq2wAEACAAJ?fife=w80-h100)
Author: Pennsylvania. Bureau of Topographic and Geologic Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages :
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Author: Pennsylvania. Commission
Publisher: Rarebooksclub.com
ISBN: 9781230163284
Category :
Languages : en
Pages : 44
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... upon the mineralogical resemblances to certain greenstones and epidotic rocks there associated with the copper and copper ores. In 1872, however, Dr. T. Sterry Hunt found clear evidence of a stratigraphical break between the Keweenawan series of the Lake Superior district, and the Huronian rocks of the South Mountain area. THE FUTURE PROSPECTS OF THE REGION. The attempts which have been made in the past 75 years to develop a workable deposit of copper in this district are indicated by the descriptions of the several properties heretofore given, but these properties do not, by any means, show all the attempts at development. Large sums of money have been wasted, as is evidenced by the remains of possibly 200 points at which shafts, open cuts, tunnels, etc., have been excavated in an endeavor to utilize the apparent underground wealth. Up to the present writing there has not been one instance of a mine producing copper ore in even apparent paying quantities. A few of the mines have reached a depth of from 300 to 450 feet, and have been prospected on the lower levels without success. It must be said, however, that most of the openings are comparatively shallow, and it is probably true, with few exceptions, that poor management and unsystematic methods, combined with unskilled labor, has greatly retarded the progress and added to the cost of development work. The investor has been encouraged by the occasional nuggets of metallic copper, weighing several pounds or more, which have been picked up in the surrounding country, and the very showy samples of ore, often containing 20 per cent, or more of native copper. However, such ore has only been found in occasional thin veins and chutes of quartz and epidotic rocks, which require the removal of...
![First[-sixth] Annual Report on the Geological Survey of Pennsylvania PDF](https://books.google.com/books/content/images/frontcover/Yio0AQAAMAAJ?fife=w80-h100)
Author: Pennsylvania. Bureau of Topographic and Geologic Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 822
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Author: Geological Survey of Pennsylvania
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 856
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Author: Geological Survey of Pennsylvania
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 686
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Author: Pennsylvania. Geological Survey
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 868
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Author: Geological Survey of Pennsylvania
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 858
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Book Description
Includes 3 atlases of fold. plates, fold. maps, fold. tab. which accompany 1885; 1886, pts. 3-4.
