Economic Geology of the Feldspar Deposits of the United States (Classic Reprint)

Economic Geology of the Feldspar Deposits of the United States (Classic Reprint) PDF

Author: Edson S. Bastin

Publisher: Forgotten Books

Published: 2017-10-12

Total Pages: 104

ISBN-13: 9780265190913

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Excerpt from Economic Geology of the Feldspar Deposits of the United States The present bulletin brings together in a single volume all available practical information concerning the commercial feldspar deposits of the United States. Scientific problems are discussed only so far as they are of commercial importance or so far as the discussion may contribute to a general understanding of the deposits. The feldspar localities of Maine were visited by the writer in the summer of 1906, the work being authorized by the United States Geo logical Survey in cooperation with the Maine State Survey Commission. Those of New York, Connecticut, Pennsylvania, and Maryland were visited at various times from 1906 to 1909 under the auspices of the United States Geological Survey. 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.

Critical Mineral Resources of the United States

Critical Mineral Resources of the United States PDF

Author: K. J. Schulz

Publisher: Geological Survey

Published: 2017

Total Pages: 868

ISBN-13: 9781411339910

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As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent reliant on foreign sources for 20 mineral commodities and imports the majority of its supply of more than 50 mineral commodities. Mineral commodities that have important uses and face potential supply disruption are critical to American economic and national security. However, a mineral commodity's importance and the nature of its supply chain can change with time; a mineral commodity that may not have been considered critical 25 years ago may be critical today, and one considered critical today may not be so in the future. The U.S. Geological Survey has produced this volume to describe a select group of mineral commodities currently critical to our economy and security. For each mineral commodity covered, the authors provide a comprehensive look at (1) the commodity's use; (2) the geology and global distribution of the mineral deposit types that account for the present and possible future supply of the commodity; (3) the current status of production, reserves, and resources in the United States and globally; and (4) environmental considerations related to the commodity's production from different types of mineral deposits. The volume describes U.S. critical mineral resources in a global context, for no country can be self-sufficient for all its mineral commodity needs, and the United States will always rely on global mineral commodity supply chains. This volume provides the scientific understanding of critical mineral resources required for informed decisionmaking by those responsible for ensuring that the United States has a secure and sustainable supply of mineral commodities.