358 F 3 . REPORT OF PROGRESS. E. W. CLAYPOLE. 



tures are roughly represented rather than mapped. At 

 present all that can be done, either geographically or geo- 

 logically, is to approach as near to that accuracy as circum- 

 stances allow. A trigonometrical survey of the State would 

 lighten the labors of the geological surveyor. 



The outcrop of the Clinton rocks follows all the zigzags 

 of the Medina represented on the plan already given, and 

 reaches the farthest points of the long narrow valleys into 

 which the west of the township is divided. In Henry valley 

 it even runs over the line into Franklin county, as in Lib- 

 erty valley it passes into Juniata. 



The great increase of lime in this group is very marked. 

 At Millerstown the limestone in the passage beds over the 

 sandrock is merely a calcareous shale ; but in some places 

 in Toboyne township, as in the Little Illinois valley, it is a 

 good bed of limestone, sometimes quarried and burnt. 

 The same is true of other calcareous bands. The sanq^- 

 vein ore bed is indicated in several places as on Cone- 

 cocheague and Buck hills, but in quality and quantity 

 seems inferior to what it is further east. The ore sandrock 

 is conspicuous and in some places richly fossiliferous, as 

 on Buck hills south of New Germantown. In the Little 

 Illinois valley is the finest exposure of this rock which I 

 have met with in the county. The other ore beds found at 

 Millerstown are not present here. The section given below 

 shows the whole series of the Upper Green shales exposed 

 on Brown's run, and the absence of the Danville ore beds 

 is conspicuous. 



Little Illinois Valley section, {PI. XL, Fig. 2.) 



Clinton hard, solid sandstone, Ore sandrock 20' 



" yellow sandstone and interhedded shale, 50' 



" yellow shale, \ 



«• olive shale, > fossiliferous, 150' 



11 reddish shale, > 



" iron sandstone interbedded with olive and yellow 



shale, ..." 20' 



41 iron sandstone, 50'? 



Dip 85° N.N. W Total thickness, 290" 



