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Author: Eldred D. Wilson Publisher: ISBN: 9781614740032 Category : Technology & Engineering Languages : en Pages : 156
Book Description
Arizona Gold Placers and Placering was published by the Arizona Bureau of Mines in conjunction with University of Arizona as Bulletin 118 in 1922 and eventually became what it is today as bulletin 142 in 1937 fourth revised edition. This book covers all of the known Placers in Arizona by county. Additional information on the placers, their formation, History, Geology, production and locations are included. In addition, best types of recovery for these placers are discussed.
Author: Eldred D. Wilson Publisher: ISBN: 9781614740032 Category : Technology & Engineering Languages : en Pages : 156
Book Description
Arizona Gold Placers and Placering was published by the Arizona Bureau of Mines in conjunction with University of Arizona as Bulletin 118 in 1922 and eventually became what it is today as bulletin 142 in 1937 fourth revised edition. This book covers all of the known Placers in Arizona by county. Additional information on the placers, their formation, History, Geology, production and locations are included. In addition, best types of recovery for these placers are discussed.
Author: Maureen G. Johnson Publisher: Forgotten Books ISBN: 9780266906537 Category : Science Languages : en Pages : 116
Book Description
Excerpt from Placer Gold Deposits of Arizona Eighty-seven placer districts in Arizona are estimated to have produced a mini mum Oi ounces of placer gold from 1774 to 1968. The location, areal extent, past production, mining history, and probable lode source summarized for each district are based on information Obtained from a wide variety of published reports relating to placer deposits. Annotated references to all reports that contain information about individual deposits are given for each 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: Maureen G. Johnson Publisher: 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.
Author: Maureen G. Johnson Publisher: ISBN: 9781614740001 Category : Technology & Engineering Languages : en Pages : 36
Book Description
A reprint of the Original US Geological Survey Bulletin 1357. This publication is a catalog of locations, Geology, and production from the placer districts of Utah. This authors series was the definative resource for placer deposits in Utah.
Author: William R. Dickinson Publisher: Geological Society of America ISBN: 0813724066 Category : Science Languages : en Pages : 176
Book Description
"Oceanian ceramic cultures making earthenware pottery spread during the past 3500 years through a dozen major island groups spanning 6000 km of the tropical Pacific Ocean from western Micronesia to western Polynesia. Island potters mixed sand as temper into clay bodies during ceramic manufacture. The nature of island sands is governed by the geotectonics of hotspot chains, island arcs, subduction zones, backarc basins, and remnant arcs as well as by sedimentology. Because small islands with bedrock exposures of restricted character are virtual point sources of sand, many tempers are diagnostic of specific islands. Petrographic study of temper sands in thin section allows distinction between indigenous pottery and exotic pottery transported from elsewhere. Study of 2223 prehistoric Oceanian potsherds from 130 islands and island clusters indicates the nature of Oceanian temper types and documents 105 cases of interisland transport of ceramics over distances typically
Author: Eldred D. Wilson
Author: Eldred D. Wilson
Author: Maureen G. Johnson
Author: Carl Lausen
Author: Maureen G. Johnson
Author: Ted G. Theodore
Author: Maureen G. Johnson
Author: University of Arizona. State Bureau of Mines
Author: Maureen G. Johnson
Author: Scott A. Stebbins
Author: William R. Dickinson