WAVERLY SERIES OF CENTRAL OHIO 21 7 



To the east of the bridge the base of the till is much lower 

 than on the western side and there is a marked line of uncon- 

 formity between the till and Bedford shale. Two hundred and 

 twenty-five feet east of the above section is the following, which 

 shows an irregular surface on which the till was deposited : 



Thickness Total thickness 

 feet feet 



No. 2. Till with beds of sand - - - 49K 54 



1, Bedford chocolate shale. Creek level - - 4% 4% 



The covered interval between this bank and the next one is 

 extensive enough to hide the top of the chocolate shale and the 

 bluff is composed of grayish shales of the upper Bedford capped 

 by the Berea sandstone. The following section is shown on the 

 western bank of the creek below a tree : 



Thickness Total thickness 

 feet fett 



No. 4. Till -.- - - - 5 5 6>< 



3. Grayish sandstone layers about one foot thick. 



Berea sandstone - - - - -14 5 1 }4 



2. Sandy, fine-grained shales with argillaceous 



ones above and below - - g% 37/4 



1. At the top a sandy concretionary layer 2 ± feet 

 thick. Shales mostly grayish and argillaceous. 

 In the lower part are spots of reddish-gray 

 shale somewhat similar to the mottled shale 

 No. 5 east of Central College. Level of creek 27% ^1% 



The Bedford shale includes the red band from I 5 to 20 feet 

 in thickness, which Dr. Orton, in his report on Franklin county, 

 considered the upper part of the Huron shale; 1 the gray shale 

 between the red and black Huron shales which was not men- 

 tioned in the county report ; and the Waverly shales. 2 



2. Berea grit was named by Dr. Newberry in 1870, from the 

 large quarries at Berea, southwest of Cleveland. 3 It is well 

 shown on Rocky Fork, to the north of the outcrops of the Bed- 

 ford shale and on the banks of Big Walnut Creek about one mile 

 northeast of Sunbury, Delaware county. There are beautiful 

 examples of ripple marks in the sandstone at both of these locali- 

 ties. On the eastern bank of Rocky Fork is an exposure of • 3.1 ^ 



1 Ibid., Vol. Ill, Pt. I, p. 638. 2 Ibid., p. 639. 3 Geol Surv. Ohio, Pt. I, p. 21. 



