R. R. Hornor
Published: 2016-12-02
Total Pages: 66
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Excerpt from Notes on the Black Sand Deposits of Southern Oregon and Northern California On account of this unusual situation and the need of ascertaining the possible increase of production in this country, the Bureau of Mines decided to investigate some of the more promising localities on the Pacific coast where gold and platinum are known to be associated with such minerals as magnetite, chromite, and ilmenite, with various siliceous minerals, the aggregate constituting what are commonly known as black sands. The object was to determine whether any of these deposits are large enough and contain sufficient gold and platinum to be profitably exploited, and also to determine whether the base minerals present, especially the iron minerals, might be commercially utilized as a source of iron. 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.