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Excerpt from Mineral Deposits of the Cerbat Range, Black Mountains, and Grand Wash Cliffs, Mohave County, Arizona Owing to the desert conditions of the region - the scarcity of grass and water - a camp outfit was dispensed with and subsistence was obtained from the mining camps and prospectors. The general method of work employed was to make hasty sketch maps and sections of the various camps or mines, using a box compass and aneroid for determination of bearings and elevations, and tying the work wherever practicable to Land Office section or township corners, railroads, other surveys, and mining-claim monuments. The early reconnaissance maps of the Geological Survey, especially the Camp Mohave and Diamond Creek contour sheets, though for the most part too crude for local use, were found to be of material service in general. In a broad sense they represent fairly well the physical features of the region and are used as the base of the geologic map (pl. I) in the present report. 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.

Long awaited by professional geologists and amateur rockhounds alike, the new Mineralogy of Arizona is a completely revised and greatly expanded edition of a book first published in 1977 and updated in 1982. New material covers 232 minerals discovered in Arizona since the first edition, including 28 first identified in the state. Also new is a section on the history of Arizona mining and mineralogy, which provides context for understanding the significance of mineral discoveries and production since prehistoric times. For nearly 20 years, Mineralogy of Arizona has been respected as the definitive reference on Arizona minerals. Now completely revised and greatly expanded with breathtaking new color photographs, the third edition covers 232 minerals discovered in Arizona since the first edition, including 28 first identified in the state.

This is one of a series of papers describing mining and related subjects affecting mining in western mining districts and mineralized areas. The parts of this paper pertaining to current production, mining and milling methods and practices, and general conditions affecting mining were collected principally during a field survey made in May 1935. Some original data obtained on previous visits to the area are also included. The history, geological background, and past production of the mines and district are largely abstracted from previous publications, for which due credit is given later in the test. The principal districts in the Black Mountains are the Oatman or San Francisco and the Union Pass or Katherine. This range contains the principal producing mines of the State, in which gold is the only important metal. Although the total production of gold is relatively small as compared to other districts where the precious metals are obtained as a by-product in copper min¬ing, the area is one of considerable economic importance to the State.