268 GEOLOGY OF OHIO. 



A comparison of these sections certainly seems to prove that No. 11 of 

 the second is the same as No. 17 of the first. The anatomy of the bed is 

 the same, for while the upper division has been removed by the eroding 

 current already referred to, we find in the lower division, which remains, 

 the characteristic pyrites band and the clay partings. But to render the 

 matter absolutely certain, this bed was traced, in connection with the 

 Crinoidal limestone, all round the western and northern outcrop to Steu- 

 benville, on the Ohio, and thence down to the river to Portland, whence 

 the bed itself was followed to Bellair, where it proved to be the No. 17 of 

 section 1. It is evident, then, that the rocks filling the interval between 

 Coal No. 8 and the massive limestone underlying Coal No. 9 have disap- 

 peared, bringing Coals Nos. 8 and 9 eighty feet nearer together at the 

 west than at the east, so that at the west Coal No. 8 holds the same rela- 

 tive position to Coal No. 10 that No. 8c does at the east. Followed still 

 further north and north-west, the limestone between Nos. 8 and 9 thins 

 out until, at the extreme north-west outcrop in Harrison county, the 

 interval is almost nothing. Further reference to this matter is made in 

 the reports on Harrison and Jefferson counties. 



As, however, this whole matter has been fully discussed by me in my 

 memoir upon the Upper Coal Measures,* it is unnecessary to make any 

 further reference to it here, beyond stating that I have as yet found no 

 reason to doubt the accuracy of the conclusions announced in that memoir 

 in December, 1872. 



LOCAL GEOLOGY. 



Warren Township. — In this township the soil is quite thick, and, for the 

 most part, so effectually covers the rocks that exposures are rare. Good 

 crops of grass and grain are obtained, and much tobacco is raised. That 

 portiop which is north of the railroad lies almost wholly in the upper 

 coals, and the hills are so high that, should one follow the ridge roads, he 



Ann. Lye. Nat. Hist. N. Y. (loc. cit). 



