220 CHARLES S. PROSSER 



a distance of 40 feet beneath the Coal Measure conglomerate 

 and most of the characteristic species re-collected. This served 

 to settle the question conclusively except for the few feet above 

 this horizon." 1 



The present writer considers the Cuyahoga shales of central 

 Ohio as composed of the shales and sandstones occurring 

 between the top of the black Sunbury shale and the base of the 

 coarse deposit called by Professor Herrick Conglomerate I. In 

 this formation, therefore, is included the 40 feet of fossiliferous 

 shales immediately underlying Conglomerate I of Professor 

 Herrick which he called the Waverly shale. 2 Should a separa- 

 tion of this shale from the Cuyahoga prove necessary it would 

 require a different name, because Waverly had already been 

 used — -first, as the name of a series ; second as the name of the 

 conglomerate in central and southern Ohio ; third, as the name 

 of the black shale in southern Ohio ; fourth, as the name of the 

 sandstone in the vicinity of Waverly; and fifth, the identical 

 term Waverly shale by Dr. Orton for the lowest division of the 

 series in southern Ohio. 3 



This formation was called the Raccoon shales by Professor 

 Hicks, who said: "It appears in force all along Raccoon 

 Creek and its tributaries, and extends westward into Franklin 

 and Delaware counties." 4 Its thickness was estimated by 

 Professor Hicks as 300 feet, while Professor Herrick stated 

 that "the Cuyahoga proper is never more than 200 feet 

 thick." 5 



In central Ohio the Cuyahoga formation is composed largely 

 of bluish to grayish shales and buff sandstones which are fairly 

 well exposed on Moot's Run and other streams in the western 

 and central parts of Licking county. 



x Rept. Geol. Surv. Ohio, Vol. VII, 1X93, PP- 5° 2 > 5°3- 

 2 Bull. Denison Univ., Vol. IV, 188S, p. 107. 



3 Rept. Geol. Surv., Ohio, Vol. II, Pi. I, 1874, pp. 619, 648; and Figs. 1 and 2 of 

 the report on Pike county. 



4 Am. Jour. Sci., 3d ser., Vol. XVI, 1878, p. 219. 

 s Bull. Geol. Soc. Amer., Vol. II, 1891, p. 38. 



