THE 



JOURNAL OF GEOLOGY 



APRIL-MAY, igoi 



THE CLASSIFICATION OF THE WAVERLY SERIES OF 

 CENTRAL OHIO 1 



INTRODUCTION 



Perhaps it may seem strange that a consideration of the 

 classification of the Waverly series 2 is proposed after the thor- 

 ough investigations of the Ohio Geological Survey directed 

 by Doctors Newberry and Orton. Their investigations gave the 

 world the main facts concerning the economic and general geol- 

 ogy of the state and the names of Newberry and Orton will be 

 associated for all time with the geology of Ohio as those of 

 Mather, Emmons, Vanuxem, and Hall are with that of New 

 York, and Henry D. Rogers and Lesley with that of Pennsyl- 

 vania. It is true of geology, however, as of other sciences that 

 the scope is constantly widening so that a restatement of facts 

 or, perhaps, another investigation of the whole subject, aided by 

 later discoveries, may be required. At present this is especially 

 true with reference to the stratigraphical geology of America. 

 During the lifetime of Dr. Newberry the nomenclature of 



1 Published by permission of Professor Edward Orton, Jr., state geologist of Ohio. 

 Presented to the tenth meeting of the Ohio State Academy of Science, Columbus, 

 December 27, 1900. 



2 Series is used in the sense proposed by the International Congress of Geologists. 

 See Work Inter. Cong. Geologists, 1886, p. 50; Gilbert, in Proc. A. A. A. S., Vol. 

 XXXVI, 1888, p. 186; and Congres Geologique International (8 e Session), Proces- 

 verbaux des Seances, 1901, p. 34. 



Vol. IX, No. 3. 205 



