210 CHARLES S. PROSSER 



I 5 to 20 feet in thickness." Outcrops of these red shales were 

 mentioned as occurring at " Taylor's Station, in Jefferson town- 

 ship, and at several points in Mifflin township, on the eastern 

 bank of Big Walnut Creek. One exposure in particular may be 

 named, which is very conspicuous, viz., the one seen in the slate 

 cliff, opposite Central College." x 



Dr. Orton's correlation of the divisions of the Waverly was 

 as follows : 



Feet 



Waverly group of the ( Cleveland shale - - 15 



sub-Carboniferous < Waverly quarry system - 60 



period ( Waverly shales 2 - - - 10-20 



In the report above mentioned Dr. Orton said "the Cleve- 

 land shale of Dr. Newberry, the Waverly black shale of Professor 

 Andrews .... is known at but a single locality in the county, 

 viz., at Ealy's Mills, in Jefferson township, on the banks of 

 Rocky Fork. From 10 to 15 feet of this formation are here 

 shown within the compass of an acre." 3 Dr. Orton further 

 stated that Professor Winchell was in error in correlating the 

 sandstone at Sunbury, Delaware county, with the Berea grit, his 

 statement being as follows: "The Sunbury stone is erroneously 

 referred in Vol. I [Vol. II] to a higher division of the Waverly, 

 viz., the Berea grit, but it certainly belongs to the lowest of 

 the sandstone courses of this formation." 4 The same volume 

 contains the "Report on the Geology of Licking County," by 

 M. C. Read, who described therein the upper Waverly of that 

 county. The oldest division noted by Read was the Waverly 

 co?iglomerate , which was said to be " conspicuously exposed along 

 the south bank of the Licking in Madison and Hanover town- 

 ships, presenting abrupt, precipitous bluffs 20 to 40 feet high." 5 

 The conglomerate was succeeded by the "olive shales," which 

 were said to occupy "an interval of 150 to 190 feet below the 

 Carboniferous conglomerate," 6 and were described as composed 

 mainly of shales, but with some "strata of massive sandstone." 



1 Rept. Geol. Surv. Ohio, Vol. Ill, Pt. I, p. 638. * Ibid., p. 642. 



2 Ibid., p. 639. S Ibid., p. 360. 



3 Ibid., p. 642. 6 Ibid., p. 359. ' 



