778 JESSE E. HYDE 



Ohio. At Slocum Station, 2^ miles east of Sciotoville, the AUens- 

 ville bed is well developed, with a thickness of 13 feet 4 inches. Of 

 this the uppermost 4 feet 3 inches are composed almost wholly 

 of the typical fine conglomerate which characterizes this member 

 in southern Ohio. Three-fourths of a mile southwest of this local- 

 ity only 2 inches of t)^ical AUensville pebble material is present 

 in a section sufhciently clear to show that no other beds of this 

 type are present. A mile and a quarter west of Slocum Station 

 only the merest trace of the AUensville member is present in the 

 form of a few quartz pebbles of usual size in a 2 -inch zone of fine- 

 grained sandstone. At Sciotoville there is no evidence of its 

 presence or suggestion of its proper horizon, although repeated 

 search has been made for it in good sections. Not only are the 

 pebbles wanting from this section, but there is no bed of coarse 

 sandstone or bed of any description, which by any character sug- 

 gests that it may be the westward extension of the AUensville bed. 

 That member completely disappears from the Logan formation 

 certainly within 3! miles and probably within 2 miles, with no 

 tendency to grade into finer beds. 



The Vinton member. — This is the youngest member of the 

 Waverly series. How much more there may have been at one time 

 is not known, since the Vinton is limited upward at all points, where 

 it has not been entirely removed, by an erosion surface, a horizon 

 of great unconformity. 



The Vinton member is named from Vinton County, where it is 

 well developed, although not nearly so well developed as elsewhere. 

 It is a series of fine-grained gray or yellowish sandstones and shales. 

 It differs from the typical Byer in the presence of shale beds and 

 in the thinner bedding and more platy nature of the somewhat 

 harder sandstones. However, as noted under the Byer member, 

 these members come to resemble each other very closely in southern 

 Ohio. 



Although no especial effort has been .made to trace them, it is 

 very evident that certain of the beds composing this member are 

 quite persistent areally. This not only indicates the uniformity 

 of conditions which prevailed but may have yet a greater signifi- 

 cance, since there is considerable faunal difference in certain of the 



