Excerpt from California Journal of Mines and Geology, 1947, Vol. 43 As a part of the United States Geological Survey 's wartime strategic mineral investigations the writers mapped the surface geology and acces sible workings Of the area during four days In January 1943, in order to determine the outlook for increased quicksilver production. Because no time was available for detailed laboratory study Of the ores or thin sec tions of the rocks, the principal contributions Of the work are the geologic maps included with this 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.