Analyses Of Rocks And Minerals From The Laboratory Of The United States Geological Survey From 1880 1914

Excerpt from Analyses of Rocks and Minerals From the Laboratory of the United States Geological Survey, 1880 to 1914 It may be observed that the classification thus indicated has not been rigorously followed. The study of some sedimentary rocks has been so related to that of their igneous neighbors that the analyses are best tabulated together; but these exceptions are few, and all are properly noted. The heading Igneous and crystalline rocks has been used in the broadest and most liberal way, and doubtless many of the analyses given under it might properly be otherwise classified. In case of uncertainty, convenience has furnished the rule to follow. 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.

1785/1918 includes material issued previously in the annual Bibliography of North America geology, and in cumulative volumes issued by N. H. Darton and F. B. Weeks. 1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.