Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Forest reserves
Languages : en
Pages : 288
Book Description
United States Geological Survey Yearbook
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Forest reserves
Languages : en
Pages : 288
Book Description
Guidelines for Determining Flood Flow Frequency
Author: Water Resources Council (U.S.). Hydrology CommitteePublisher:
ISBN:
Category : Flood forecasting
Languages : en
Pages : 232
Book Description
Gold in Porphyry Copper Systems
Author: Edwin W. TookerPublisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 68
Book Description
U.S. Geological Survey Bulletin
Author: A Uniform Technique for Determining Flood Flow Frequencies
Author: Water Resources Council (U.S.). Hydrology CommitteePublisher:
ISBN:
Category : Flood forecasting
Languages : en
Pages : 24
Book Description
Placer Gold Deposits of Nevada (Classic Reprint)
Author: Maureen G. JohnsonPublisher: Forgotten Books
ISBN: 9780331313765
Category :
Languages : en
Pages : 146
Book Description
Excerpt from Placer Gold Deposits of Nevada Following the discovery of placers at Gold Canyon, placer discoveries in Nevada were broadly in three periods: the 1860's to 1880's, when many small deposits throughout the State were discovered and sporadically worked and several large placers were discovered and extensively worked; the short period between 1906 and 1910, when very rich placers were dis covered at Lynn, Battle Mountain, Manhattan, and Round Mountain; the early 1930's, when economic conditions created by the depression caused a renewed interest in placer mining, and many individuals sought, and a few discovered, new placer areas throughout the State. The location of the placers described in this report is shown on plate 1. Very little factual information can be found about the early periods of placer mining in Nevada. For many placers, the only reports available are hearsay estimates of production and speculations about the extent of the placer ground based on remnants of placer pits, shafts, and other workings. Many of the placers said to have had a high production between 1860 and 1890 were worked by Chinese miners who came to Nevada dur ing the building of the railroads and stayed on to work at mining and other activities. The Chinese were reputed to be secretive with their earnings from the placers and did not ship the gold to the mint by Wells Fargo or other shippers. They worked the gravels very thoroughly in areas where American miners did not wish to expend great labor to win the gold. The placers in the Sierra and Spring Valley districts, Pershing County, were worked by Chinese miners; they have a very high estimated production before 1900 and a comparatively low known production since that time. 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.
Preliminary Determination of Epicenters
Author: Publisher:
ISBN:
Category : Earthquake prediction
Languages : en
Pages : 546
Book Description
Water Resources Data
Author: New Publications of the Geological Survey
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 836
Book Description
Author: