SUPPLEMENTAL REPORT — HOCKING VALLEY. 819 



C. R..RO and near the "Old Fort," built by the Mound-builders. Below 

 the railroad bridge the limestone thins out and disappears, and we find 

 over the Waverly four feet of blue shales with iron ore, and over the 

 shale a hard sandstone with coal plants. The relation of the limestone 

 to the Waverly is unmistakable, and the sections were taken where the 

 banks are vertical. 



A few miles below Logan, on the land of James Tannihill, Section 28, 

 Green township, Hocking county, is another deposit of limestone belong- 

 ing to the same horizontal series. It has been largely quarried at this, 

 point for quicklime and for furnace flux. The bottom was not seen, but 

 about nine feet were measured, the upper two feet two inches being of 

 buff color. Above are two feet seven inches of clay shale containing at 

 the top about fifteen inches of limestone, with a layer of nodules of ore 

 over it. Quartz pebbles were seen in this ore, a feeble representation of ' 

 the^Coal Measures' Conglomerate. The Logan sandstone, or Upper Waver- 

 ly, which lies in the lower part of all the hills along the river, must neces- 

 sarily pass closely under this limestone, and I have no doubt that search 

 will reveal exposures along the outcrop of this apparently limited deposit 

 of limestone, where both the limestone and the Waverly will appear in 

 vertical section in close contact, or separated by only a few feet of shale. 



We now reach, in our progress to the northeast, the limestone at Max- 

 ville and vicinity, in Perry county, the location which gave the name 

 to the formation. On the land of David Hardy, near Maxville, the lime- 

 stone measured eight feet eight inches in thickness, the upper three feet 

 two inches being of buff color, and the lower five feet six inches in lay- 

 ers of hard bluish-gray stone. The five feet immediately below the lime- 

 stone were not seen, but ,below this small interval, or five feet beneath the 

 Maxville limestone, comes in the Logan or Upper Waverly sandstone with its usual 

 fucoids and shells. Eight feet of this sandstone were seen above the bed 

 of the stream. At this exposure two feet of sandstone were seen directly 

 over the limestone, but at other points there is ore on the limestone with 

 sometimes black shale over the ore. In gome places the limestone is 

 thicker than at the Hardy exposure, especially in its upper buff portion. 

 The latter portion is apparently more fossiliferous than the other, and is 

 often singularly mottled with dark bluish blotches. The limestone be- 

 low Logan exhibited a similarly mottled aspect. Following this lime- 

 stone from Maxville down the Little Monday Creek to the Winona Fur- 

 nace we find a thin development of it in the point of the hill near the 

 furnace. Here above it is an iron ore, which is drifted for, and a very 

 thin seam of coal three or four feet higher. At this place there was no 

 exposure of any thing below the limestone, but a few rods distant, a wel 



