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Download or read book Early Ordovician Strata Along Fox River in Northern Illinois (Classic Reprint) written by H. B. Willman and published by Forgotten Books. This book was released on 2018-01-08 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Early Ordovician Strata Along Fox River in Northern Illinois A nearly complete sequence of Ordovician strata along Fox River, southwest of Aurora, indicates the presence of the Kankakee arch - a major structure trending northwest - southeast across northeastern Illinois - and the probable location of the Sandwich fault, which parallels the arch for many miles and had been found previously by studies of well records. Outcrops of sandstone and dolomite which have long been corre lated with the St. Peter and galena-platteville formations have been found to belong to the New Richmond sandstone and the Shakopee dolomite. Study of the outcrops and well records shows that the anticlinal struc ture underwent major movements both before and after deposition of the St. Peter sandstone. 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.