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Author: Errol MacBoyle
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 202
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Book Description
Author: Errol MacBoyle
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 202
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Book Description
Author: Errol Macboyle
Publisher:
ISBN: 9781375729345
Category : Science
Languages : en
Pages : 198
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Book Description
Author: Errol Mac Boyle
Publisher: Forgotten Books
ISBN: 9781527815841
Category : Science
Languages : en
Pages : 196
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Book Description
Excerpt from Mines and Mineral Resources of Plumas County Gold is the only metalliferous product of importance in the Butte Valley district. It has been produced from rich placer diggings in gravels of both recent and ancient streams. Considerable gold is also being recovered from quartz veins, and prospects for the future are promising. The settlement of Butte Valley (sometimes known as Butt Valley) is situated at an elevation of ten miles by stage from Crescent Mills on the Indian Valley Railway. It is about ten miles by trail west of Greenville, and about nine miles by stage road south of Prattville. Prattville is sixteen miles by stage northwest of Greenville, which is ten miles northwest of Keddie, a station on the main line of the 'western Pacific Railroad. During the winter months heavy falls of snow and rain make transportation difficult. The roads are good during the summer. Timber consists of pine, fir, spruce and tamarack. Water is plentiful, since the North Fork Feather River, Indian Creek, Yellow Creek, and several small streams flow through the district. 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: Errol MacBoyle
Publisher: Theclassics.Us
ISBN: 9781230234113
Category :
Languages : en
Pages : 88
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Book Description
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. 1920 edition. Excerpt: ... basalt, representing an intervolcanic channel later than the Tertiary gravel channels. A small patch of Tertiary gravel occurs at American House, in the Bidwell Bar quadrangle. This deposit, lying in a sag 800' above Salt Creek, probably represents a tributary of the main La Porte channel. A capping of basalt covers the Calaveras bedrock east of the gravel patch. The bedrock to the west is amphibolite. On both east and west the bedrock rises several hundred feet, showing the old river valley. A considerable body of white quartz gravel underlies the alluvium deposit in Little Grass Valley, two miles northwest of Bald Mountain. This has been much exploited by shallow shafts, but, being lower than the South Fork Feather River, because of excess water it can not be profitably mined. The gravel is not thoroughly rounded, thus resembling that at La Porte and Richmond Hill. Above La Porte, the channel has been seriously disturbed by movements in a fault zone which is at least one mile wide and which has a general northwest direction. The total downthrow on the northeast side is probably 520'. The first fault is exposed in the bedrock at the upper end of the La Porte diggings; here the downthrow on the east side is 55', and the gravel beds are bent over the nearly perpendicular fault scarp. Threesquarters of a mile southeast of La Porte on a bedrock of Calaveras formation a detached body of gravel lies abnormally depressed 200' below the level of the old channel. At this point the channel paralleled the fault lines, and several slices have been differentially dropped or elevated. The downthrow is 200' to the northeast, but there are several intermediate benches. The Clay Bank tunnel, portal elevation 4000', has been driven 3000' northwest to...
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 36
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 128
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Author: Errol Macboyle
Publisher: Scholar's Choice
ISBN: 9781295952823
Category :
Languages : en
Pages : 198
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: California. Division of Mines and Mining
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 602
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Book Description
Report for 1917/18 consists of three monographs by E. MacBoyle issued separately as Mines and mineral resources of Nevada County. Mines and mineral resources of Plumas County. Mines and mineral resources of Sierra County.
Author: California State Mining Bureau
Publisher: CreateSpace
ISBN: 9781497529496
Category : History
Languages : en
Pages : 200
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Book Description
Mining historian Kerby Jackson introduces us to a classic mining work in this important re-issue of Mines and Mineral Resources of Sierra County, California. Unavailable since 1918, this publication was originally compiled by the California State Mining Bureau and includes details on the gold mines of Plumas County, California. Also included are insights into the mineralization and other characteristics of this important mining region, as well as the location of historic gold mines. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.
Author:
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 434
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Book Description
