674 JESSE E. HYDE 



G. F. Lamb has described two conglomerate horizons in Wayne 

 County in northern Ohio.^ Both have the bedding incHned to the 

 northward, and erosion surfaces are recorded beneath each and 

 are described as unconformities. The lower bed is from 2 to 45 

 feet thick and is about 625 feet above the Berea sandstone. From 

 this it would appear to be near the horizon of the Black Hand 

 member. It may, however, be the Berne member (which in places 

 is Herrick's Conglomerate I recorded by Herrick in northern Ohio) 

 which was also preceded by erosion over the central Ohio con- 

 glomerate areas, and which extends areally beyond the Black Hand 

 both in the Granville facies and on the western side of the Hocking 

 Valley facies. 



The Berne member, never over 20 feet thick, and frequently 

 only one foot in thickness, is always present and readily recognized, 

 resting on the Black Hand. The term is proposed from numerous 

 outcrops in Berne Township of Fairfield County. In the Hocking 

 Valley region, as in the Toboso region, this bed consists largely 

 of pebbles, but sandstones of moderate coarseness and shales are 

 found in it at some localities. In mapping, its upper limit forms 

 the logical plane to be followed since it usually forms the top of the 

 ledges and the bed is lithologically very like the underlying con- 

 glomerates. The contour of the surface of this bed, that is, the 

 surface of the Cuyahoga deposits, is much the same as that of the 

 Black Hand member, but in order to understand the Berne member 

 it is desirable that the top of the Black Hand be distinguished and 

 that the contour of its surface be determined separately from that 

 of the Berne member, thin though the latter be. 



The topographic map is essential to the determination of these 

 features, and at the time the field work on this region was done 

 the Lancaster and Logan sheets were the only ones issued covering 

 any considerable portion of the area. The Chillicothe sheet which 

 lies southwest of the Lancaster sheet, covers only a very small area 

 of the transition zone on the extreme western side of the province. 

 Much of the most interesting part of the province in southern 

 Hocking and the western part of Vinton counties lies south of the 



^ " Middle Mississippian Unconformities and Conglomerates in Northern Ohio, 

 Ohio Naturalist, XIV (1914), 344-46. 



