SUPPLEMENTAL REPORT — HANGING ROCK DISTRICT. 901 



tiou as the Logan Lime and Ore. Through Vinton and Jackson counties 

 there are many showings of ore at this horizon, but none of them are 

 known to be worked. 



3. The next ore found in ascending the scale is of somewhat more im- 

 portance. Its place is forty or fifty feet above the Logan flint. It rests 

 upon the Maxville Limestone when this is present, and gets its name 

 from this association, being known in the northern part of the district 

 as the Maxville Block Ore. The ore often retains its place when the 

 limestone is wanting. The same thing can be observed in repeated in- 

 stances in the other ores that are associated with limestones in the dis- 

 trict, the ore seams being generally more persistent than the limestones. 



An exception to this statement must be made in the case of some of 

 the outcrops of thi.-* limestone in Vinton and Jackson counties. At Reed's 

 Mills, near Hamden Junction, there is quite an exposure of the Maxville 

 horizon, but ;±he ore seen at this point is thin and worthless. Of the 

 numerous outcrops of the limestone in Lick and Franklin townships, 

 Jackson county, none has been found to hold the ore, but it appears 

 again in Hamilton township, where it has been worked to a small extent. 



In Monday Creek township, Perry county, and the adjoining township 

 of Falls, in Hocking county, the Maxville Limestone is now quite ex- 

 tensively worked for furnace flux. The Logan fire-clay, one of the most 

 valuable clay seams of Ohio, is also obtained from the same horizon, its 

 place being immediately above the ore and limestone. A considerable 

 quantity of ore is raised with the fire-clay and the limestone, according- 

 ly, in this vicinity. In quite a number of instances, the ore alone is 

 worked, the overlying clay being below the standard quality, and the 

 limestone being wanting. The Sciotoville and Webster fire-clays, of 

 Scioto county, probably belong to the same horizon. 



In the vicinity of Logan, the Maxville Block Ore varies in thickness 

 from an inch tea foot. It will probably average eight inches in the quarries 

 that are most largely worked. It often lies in two courses, the heavier be- 

 ing the lower. It is a dark-colored limonite ore, of medium weight, and 

 of good composition, yielding about forty per cent, of iron in the furnace. 



4. Passing, at sixty-five to eighty-five feet above the Maxville Lime- 

 stone, an horizon of ore, fire-clay and coal — none of which are worked, 

 we come at an elevation above the same limestone of eighty-five to one 

 hundred and fifteen feet, to a block ore of excellent quality, and quite 

 extensive distribution. A good deal of it was taken out for Union Fur- 

 nace in Starr township, Hocking county, and it is accordingly named in 

 the section, the Union Furnace Block or Lower Main Block. It has also 

 been worked to the east and north of Logan to quite an extent. It 



