THE IRON ORES. 405 
5. Iron ORES OF SOUTHERN PERRY AND HocKkInG COUNTIES. 
THE HOCKING VALLEY. 
The ores of the region now to be considered are of considerably 
greater importance than those deseribed in the last section. They 
came from more and better horizons, and they have been worked in a 
much larger way. ‘The principal addition in the matter of horizons of 
ore is the reappearance of the blackband in strong force and good con- 
dition in the central part of Perry county. The Ferriferous limestone 
(Baird ore) is also largely worked in Hocking county. Only one of 
the block ores is worked to any great extent, and this comes from the 
level of the Junction City ore, 15 feet below the Lower Mercer lime- 
stone. 
The geological section including these ores is repeated here to 
make the statements that follow more easily intelligible. One ore from 
the Barren Measures will need to be considered here, as all the develop- 
ments of it have associated it with the main seams of the Lower Meas- 
ures. The order is as follows: 
Dugway ore. 
Mahoning sandstone—thin. 
Upper Freeport coal (Coal No. 7), carrying blackband in places. 
Upper Freeport clay and Buchtel ore. 
AD LOLSO) us Upper Freeport limestone and Straitsville ore. 
Lower Freeport coal—Coal Nos. 6a and 6b. 
30 to 50 ft. Lower Freeport sandstone—often shale. 
Middle Kittanning coal—Coal No. 6. 
20 to 40 ft. Kittanning shales, holding Snow Fork kidney. 
Lower Kittanning coal—Coal No. 5. 
10 to 20 ft. Baird ore (Limestone ore of Hanging Rock). 
Ferriferous limestone. 
60 to 70 ft. Limestone kidney or block—Putnam Hill horizon. 
Upper Mercer limestone and ore—unsteady. 
Upper Mercer coal—thin. 
20 to 30 ft. Lower Mercer limestone and ores. 
Lower Mercer coal. 
AO ft. (?) 
Wellston or Quakertown coal? 
60 ft. (%) 
Sharon coal horizon ? 
Maxville limestone and block ore—Sub-carboniferous. 
