428 GEOLOGY OF OHIO. 
of Vinton county. In the latter county it is mined in Elk and Brown 
townships to a small extent. In Lawrence and Scioto counties it has 
also long been worked in a like small way. It is here known as the 
Canary ore. Its position is about 25 feet below the Ferriferous lime- 
stone. The seam does not invite nor warrant large work, and it cannot 
be said to make an important contribution to the iron making resources 
of the district. 
Limestone Ore. 
The last and main ore of the division is so well known, and has 
been so often characterized already in the geological reports of the 
State that no extended description is here called for. The Ferriferous 
limestone that bears it, is itself of great value and importance to the 
whole district, yielding almost the entire supply of furnace flux and 
lime. The thickness of the limestone exceeds 5 feet through most of 
the territory that contains it, and sometimes reaches 10 feet. It is 
exceedingly regular and persistent, leaving but few wants throughout 
its field. It can be followed almost without a break from the Ohio 
River hills to Brown township, Vinton county. 
The ore has been quite fully described in vol. III, pages 905-6, 
and also on pages 404 and 413 of the present chapter. It now remains 
to point out its chief development up to the present time. 
In the first place it is to be noted that, like its limestone, it is an 
unusually persistent element. The chief “wants” or breaks in its 
continuity are the following: 
~ About Hanging Rock, and thence to the east of Pine Grove Fur- 
nace, taking in the site of La Grange Furnace, long since dismantled, 
there is found one of the largest of the districts that are wanting in 
the ore and limestone. ‘The failure of the ore was in fact the cause of 
the abandonment of La Grange Furnace. A large part of Pine Grove 
lands lacks both limestone and ore. 
Again, on Storms’ Creek, above old Vesuvius Furnace, a consider- 
able ‘‘ want” has been proved in the ore. There are several square 
miles of unproductive ore ground here. 
On Raccoon Creek, in Vinton township, Vinton county, along the 
Ohio and West Virginia Railroad, the limestone is very irregular, dis- 
appearing very frequently from the sections. The ore is equally unre- 
