594 GEOLOGY OF OHIO. 



This limestone occupies the horizon, and is doubtless the equivalent 

 of that, which, when highly charged with iron, is in Tuscarawas county 

 called the "mountain ore." The notable amount of iron it contains will 

 perhaps, make it valuable as a flux where too lean to be considered an ore. 



This report will be concluded with a general section of the rocks 

 of the county. An examination will show that the different strata 

 vary greatly in thickness and character. The local limestones tend 

 to mislead the explorer, and it is possible that some of the distances 

 given between the blue and gray limestones, are too small, as the local 

 cannel coal limestone may in some instances have been mistaken 

 for the blue. The lower four limestones are locally cherty, and in 

 places constitute flint ridges. The one above the cannel coal is some- 

 times separated from its coal by shales, and sometimes changes to a 

 black limestone, and may be mistaken for the one directly below Coal 

 No. 6. The coal below it is often bituminous, and sometimes wanting. 

 The black limestone, in places, approaches very near to Coal No. 6, and 

 becomes a drab limestone much like that below Coal No. 6, in Colum- 

 biana county. 



