Book Description

Excerpt from The Geological Map of Illinois Gentlemen - I transcript herewith the manuscript of a geological map of the State with brief explanatory notes by Dr. Stuart Weller, and respectfully recommend its publication as a bulletin. It is a well founded practice to begin new work with a careful digest of material already on hand and available. With this thought in mind Dr. Weller was instructed soon after his appointment as geologist of this survey, to compile in the form of a geological map such existing information regarding the formation of the State as might be available. It was believed that such a compilation would throw into sharp relief the areas in which accurate and inaccurate surveys already had been made, and would permit of economical direction of future work. The map herewith transmitted is the result. It will be seen that it is very greatly generalized, and the need of additional detailed work in many portions of the State is evident. The present map, will, however, serve as an excellent base upon which to make corrections as the present survey progresses. Since it will be impossible to cover the entire State with detailed maps for some years, and since no geologic map of the State is now available for general distribution, it is recommended that a small edition be printed for the use of the field parties of the survey, the schools of the State and the persons interested in its mineral resources. In using this map it should be remembered that it is merely a summary of the best information available at the time of publication. There are probably many and gross errors, which it will be the purpose of the present survey to correct. The map, as Dr. Weller indicates, is based largely on that published some years ago by Dr. Worthen, and the conditions under which the Wortben survey was made, were not such as to permit of the modern degree of detail and accuracy. 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.