2 14 CHARLES S. PROSSER 



It will be noticed that Dr. Newberry accepted the separation 

 of the Berea shale from the Cauyhoga shale ; but did not accept 

 the reference of the Cleveland shale to the Ohio shale. This 

 point he discussed quite fully and stated that the union of the 

 Cleveland, Erie, and Huron shales to form the Ohio shale seemed 

 unwarranted. 1 Dr. Newberry referred to Professor Hicks 

 announcement of the discovery of the Cleveland shale in Dela- 

 ware county, saying in conclusion : " I think he has found 

 there the Berea shale, which lies immediately above the Berea 

 grit." 2 



In 1 89 1 Professor Herrick reviewed the general stratigraphy 

 of the Waverly series, commencing with the Bedford shale. 

 The lower boundary of the Waverly, however, he thought "must 

 be found in the Berea grit, which .... is a sharply limited 

 and easily recognizable horizon throughout Ohio." 3 The Berea 

 grit came next, followed by the Berea shale, which, he states, is 

 a term "conveniently applied to the thin band of bituminous 

 shale above the grit, and perhaps should not be extended (as 

 the writer has done in a previous paper) to the gray and blue 

 shales above." 4 For the overlying rocks he used the name 

 Cuyahoga shale in the sense in which it was used by Dr. Orton, 

 except that the upper 40 feet, as in the previous paper, was 

 called the Waverly shale. This division was stated to be 

 stratigraphically continuous with the Cuyahoga shale which it 

 also resembled lithologically, but paleontologically it more 

 closely resembled the succeeding division or Kinderhook. The 

 last division was called the Burlington and Keokuk. 



REVISED CLASSIFICATION 



This concludes the review of all the important papers pub- 

 lished concerning the classification of the Waverly series of 

 central Ohio. As a result of this study followed by an exami- 

 nation of the formations in the field, the writer proposes the 

 following classification for the Waverly series of central Ohio. 



l Ibid., p. 128. 3 Bull. Geol. Soc. Amer., Vol. II, p. 35. 



"Ibid., p. 129. */£>id., p. 35. 



