STRATIGRAPHY OF THE WAVERLY FORMATIONS OF 

 CENTRAL AND SOUTHERN OHIO (Continued) 



JESSE E. HYDE 

 Western Reserve University 



PART II 

 CUYAHOGA FORMATION (continued) 



THE SCIOTO VALLEY SHALE EACIES 



Extent and Thickness. — The Scioto River from Chillicothe to 

 Portsmouth flows roughly along the axis of this area. Here the 

 Cuyahoga is constituted almost entirely of bluish-gray clay shale 

 with only an occasional sandstone bed. To the eastward, as the 

 margin of the Hocking Valley conglomerate facies is approached, 

 sandstones become more numerous and increase in thickness. A 

 similar increase in sandstone content is experienced to the west- 

 ward, as the Vanceburg sandstone facies is approached. These 

 transitional sandstones are, however, of a different type on opposite 

 sides of the shale area. On the eastern side are found hard, coarse 

 sandstones (but finer grained than the Hocking Valley sandstones) 

 that are peculiarly harsh to the touch; they are reddish-brown on 

 the outcrop, light greenish-blue under cover, and Spirophyton is 

 not present to any extent. Beds of this type persist as far west 

 as the Scioto River, where they may be four or five feet thick, 

 and some of the beds can be traced for several miles. On the 

 western side of this shale facies, the sandstones are of the type 

 which characterizes the Vanceburg facies, to be described presently, 

 but distinguished particularly by their soft, clayey nature, light 

 yellowish color on the outcrop but blue-gray under cover, and 

 abundance of Spirophyton. One member only of the latter type 

 persists any considerable distance into the shale area, the Buena 

 Vista member, and it may be found in some sections east of the 

 Scioto River in the presence of sandstones that have obviously 

 been derived from the eastward, but even in the same section 



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