THE CLASSIFICATION OF THE NIAGARAN FORMATIONS 

 OF WESTERN OHIO 1 



CHARLES S. PROSSER 

 Ohio State University 



CONTENTS 

 Introduction 

 Description of Sections 

 Ludlow Creek Sections 



Section of Ludlow Falls and the Smith Quarry 

 Section of Western Wall of the Smith Quarry 

 Section of the Otto Ehlers Quarry 

 Section of the Maxwell Quarry 

 General Section along Ludlow Creek 



Correlation of the Brassfield Limestone 

 Other Sections of Western Ohio 

 Sections in and near Covington 



Section of the Jackson Stone Co. Quarry 

 Section of the J. W. Ruhl Quarry at Covington 

 Section near Lewisburg 



Section at the Lewisburg Stone Co. Quarry 

 Section near Laurel, Indiana 

 Derbyshire Falls Section 



INTRODUCTION 



There has been more or less uncertainty concerning the names 

 which ought to be used for the Niagaran formations of the Silurian 

 system in western Ohio together with their correlation with the 

 formations of the same series in eastern Indiana. Field work in the 

 summer of 19 14 in this area has cleared up some of this uncertainty 

 and part of the results are deemed of sufficient importance to war- 

 rant their early publication. 



1 Presented at the Ohio Academy of Science meeting in Columbus on November 28, 

 1914, and at the American Association for the Advancement of Science meeting in 

 Columbus on December 28, 1915. Published by permission of the State Geologist 

 of Ohio. 



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