The Geology of Pennsylvania, Vol. 1 of 2

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Excerpt from The Geology of Pennsylvania, Vol. 1 of 2: A Government Survey A like motive - a. Desire to indicate the positions occupied by the several widely-diffused Formations of Pennsylvania and the United States in the general scale of the strata best known to the geological world (i mean the scale of the European Rocks) - has impelled me to add an Essay, originally presented in abstract to the British Association, On the Correlation of the American and British Palaeozoic Strata. It is only through such wide comparisons, cautiously instituted, that we can learn with what portions of the world our country is in nearest affinity. In the Appendix to this Work there appears, amid other miscellaneous matter, a description of the methods of research employed in the Geological Survey of Pennsylvania, with some suggestions in relation to geological explorations gene rally, adapted to other countries. 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.