I20 Bulletin of Laboratories of Denison University. [voi. xiii 



conglomerate and coarse sandstone of prevailingly red color, "^ 

 a description which closely characterizes the formation as it ap- 

 pears in Perry township, and a thickness which Professor Pros- 

 ser verified in the vicinity of Claylick^. 



From the highways of Perry township the coarse con- 

 glomerate horizon of this Black Hand formation is the most 

 striking lithological feature. Along the "Newark Road" (Fig. 

 3) from Perryton towards Hanover, and along the roads bear- 

 ing northward to Fallsburg and Reform it stands out in cliffs 

 revealed by lateral planation of the older drainage lines. 



Both above and below this conglomerate horizon we find 

 thiner bedded buff sandy layers, which weather into gentle 

 slopes in accord with the overlying Logan slopes (Fig. 2). But 

 wherever the Black Hand contains 10 feet or more of the con- 

 glomerate phase, a break is noticed in this slope. 



In the central part of Licking county Professor Herrick^ 

 found that this formation dips to the south about 14 feet, and 

 to the east about 18 feet per mile. In determining the eastern 

 dip he made his computations from a line of precise levels, us- 

 ing as a base Conglomerate I*. The work in Perry township 

 done with two barometers is not so exact ; our readings give 

 an eastern dip of nearly 1 3 feet, and a southern dip of about 

 18 feet per mile. 



In the eastern part of the county. Conglomerate I, which 

 Professor Herrick used as a base is not constant in texture as 

 in the central part ; it is not sharply marked because the whole 

 formation is often largely conglomerate. Therefore in ascer- 



'Bull. Sci. Lab. Denison Univ., vol. ii, 1887, p. 15. 



''■Loc. cit., pp. 360, 361. 



•^Bull. Sci. Lab. Denison Univ., vol. iii, p. 24. 



^Herrick considered Conglomerate I as the base of the Black Hand. In 

 speaking of the section exposed in Quarry run and on Stasel Clift'east of Newark, 

 Prosser says : "coarse grained buff sandstones extend for about sixty feet below 

 the base of Conglomerate I, at which horizon is the most marked lithologic 

 change in the rocks, and the base of these sandstones has been selected as the 

 line of division between the Black Hand and Cuyahoga formations." (The Am. 

 Geologist, voL.xxxiv, 1904. pp. 359-360). 



