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This guidebook complements the field trips offered during the 42nd Annual Meeting of the GSA North-Central Section, held in Evansville, Indiana. References to mining history, with respect to building stone, coal, and fluorite, are made throughout.
Excerpt from Illinois Basin The Ozark region and the Wisconsin uplands are relatively stable areas which have not been subjected to notable depression or deeply buried by sediments since pre-cambrian time. The Cincinnati arch is believed to have been in existence during the Ordovician period and may reflect conditions in the basement rocks dating back much farther. The monocline that bounds the Illinois basin on the south, however, is of much later origin and probably came into existence during the Appalachian uplift. 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.
With more than 130 color photographs and 170 drawings, this book shows how to read geological history: plate movements, earthquakes, glaciers, rivers, seas, and other forces that have shaped the earth over millions of years. Each geological region of eastern North America is described vividly and illustrated with detailed maps and cross sections. Highway tours tell where to go to find the best examples of each kind of formation.