MORROW COUNTY. 263 



and that thin beds of alternating sandstone and shale succeed the thick 

 beds before the main shale bed appears. 



The Berea grit is also exposed and slightly wrought on Mr. T. N. Hick- 

 man's land, S. E. £ section 11, Gilead, and on Furbay Conant's, near Mr. 

 Hickman's. 



Bedford Shale. — The only evidence there is of the continuance of the 

 Bedford shale into Morrow county consists of the difference between the 

 Cleveland shale and that seen to lie below the quarry of Mr. Brown at 

 Iberia, and immediately below the sandstone and shale (No. 4) at Mt. 

 Gilead. The Cleveland, as seen at Mt. Gilead and one or two points 

 further south, is of a dark or blackish color, somewhat slaty. The shale 

 underlying the heavy stone at Iberia is blue and fine, not showing any 

 slaty structure, and may represent the Bedford. 



Cleveland Shale. — This shale, which is regarded by Dr. Newberry as the 

 base of the Waverly group, and thus as forming the base of the great 

 Carboniferous system, may be seen in the section at Mt. Gilead. It occu- 

 pies the lowest portion of the shale of No. 5, and lies in the bed of the 

 stream. It is supposed to have a thickness of about 50 feet, and to be 

 followed by the Erie shale and sandstone (400 or 500 feet in Cuyahoga 

 count)-), which is followed by the Huron shale (the great black slate). 

 There is an exposure of similar shale in the low banks of the creek near 

 S. Woodbury, on N. W. £ lot 9, in the northern part of Peru township, 

 where the following section, in descending order, may be made out : 



Section in Cleveland Shale near South Woodbury. 



No. 1. Silicious limestone. This is of the same very hard texture, 

 blue color, and general appearance as the limestone at 

 Mandeville's quarry, belonging to the Cuyahoga shales 

 and sandstone ; also the same as some very hard nodules 

 in the sandstone. It is here in one continuous bed. It 



breaks with difficulty, and with silicious fracture 3 in. 



" 2. Blackish slate, somewhat like the slate at Cardington (Hu- 

 ron), but more similar to that at the bottom of the sec- 

 tion at Mt. Gileau, seen 6 ft. 



Total 6 ft. 3 in. 



The exact relations of this exposure to the great group of shales that 

 make up the interval between the Hamilton and the Berea grit, it is im- 

 possible to state. It is thought, however, that the horizon of the bottom 

 of the Berea grit passes about half a mile east of this point, judging 

 from the topography; and if that be correct, there is no doubt this shale 

 belongs to the Cleveland. 



On the contrary, the frequent slight exposures of black slate through- 



