The Ohio iJSCcituralist, 



PUBLISHED BY 



The Biological Club of the Ohio State Uni'versity. 



Volume VIII. 



JANUARY, 1908. 



No. 3 



TABLE OF CONTENTS 



ScHEFFEi.— An Esker Group .Smith of n.-iytoii, Uliio 231 



Jackson— Notus on the Aiihididae 243 



Now Books 250 



Xiitunil History Survey 250 



AN ESKER GROUP SOUTH OF DAYTON, OHIO.' 



Earl R. Sciieffel 



Contents. 



Introduction. 



General Discussion of Eskers. 



Preliminary Description of Region. 



Bearing on Archaeology. 



Topographic Relations. 



Theories of Origin. 

 Detailed Description of Eskers. 



Kanie Area to the West of Eskers 

 Studies. 



Proximity of Eskers. 



Height of Eskers. 



Reticulation. 



Knolls. 

 Economic Importance. 

 Area to the East. 

 Conclusion and Summary. 



Altitude of These' Deposits. 

 Composition of Eskers. 

 Rock Weathering. 

 Crest -Lines. 



Introduction. This paper has for its object the discussion of 

 an esker group^ south of Dayton, Ohio;^ which group constitutes 

 a part of the first or outer moraine of the Miami Lobe of the 

 Late Wisconsin ice where it forms the east blufl of the Great 

 Miami River south of Da3^ton.'' 



Given before tlie Ohio Academy of Science, Nov. 30, 1907, at Oxford, O., repre- 

 senting work performed imder the direction of Professor Frank Carney as 

 partial reciuirement for the Master's Degree. 



F. G. Clapp, Jour, of Geol., Vol. XII. (1904), pp. 203-210. 



The writer's attention was first called to the group the past vear under the name 

 "Morainic Ridges," by Professor W. B. Werthncr, of 'Steele High School, 

 located in the city mentioned. Professor Werthner stated that Profes.sor 

 August F. Foerste of the same school and himself had spent some time 

 together in the study of this region, but that the field was still clear for inves- 

 tigation and publication. Professor Foerste later made practically the same 

 statement. The writer is indelited to both of the.se gentlemen for their cour- 

 tesy. He also wishes to thank his instructor Professor Carney, lor going 

 over the field with him and taking the several excellent photographs illus- 

 trating this article. 



P. Leverett, Monograph XLI, U. S. Geol. Surv., (1902), p. S.'jo. 



T. C. Chamberlin, 3rd Annual Report, U. S. Geol. Surv.. (1881-82), p. .'-t-'U. 



