820 GEOLOGY OF OHIO. 
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In northern Salt Creek the Upper Mercer is the predominant limestone, 
as is shown by its interval below the Putnam Hill (gray) limestone (30 
to 50 feet), and by the structure of its underlying coal (3a), as compared 
with that on Wayne Hill (compare Figs. X and XI, see Fig. III). 
The interval referred to runs as follows on adjoining farms: John 
Amsbaugh’s, 31 feet; Josiah Slutz’s, 41 feet; Henry R. Leeper’s, 50 
feet; Leonard Matthews’, 50 feet. 
The Tionesta coal (36) is represented by the “sandstone vein,” on 
Wayne Hill (Fig. III), near Fredericksburg, which has been called No. 6. 
The Putnam Hill limestone, which should appear about 20 feet above 
this coal, is cut away by a heavy sandstone, but on the opposite side 
of Apple Creek, at Joseph McElroy’s, the limestone is 5 feet thick at 
its proper level, as is also the case in a section north of Holmesville, 
given by Dr. Newberry (Vol. II, chart No. 2). 
The prominent gray limestone of the eastern and northern-central 
part of the county is considered the Putnam Hill limestone, while in 
the southern-central and western parts, both this and the Ferriferous are . 
believed to be represented, though rarely together. [On limestones, 
see p. 817]. In some cases the Ferriferous and Putnam Hill 
are seen together, as at C. Visher’s and E. Snellenberger’s, in south- 
eastern German; M. Hochstetter’s, east of Shanesville, Tuscarawas 
county ; Jos. Finley’s and Daniel Uhl’s (Fig. LV), in Central Mechanic ; 
A. Greenheiser’s, adjoining A. A. Taylur’s, in Knox (Fig. VI), and 
probably Wm. White’s and vicinity, in southern Richland. The intervals 
vary from 15 to 41 feet; average, 25. Where only a single gray lime- 
stone is present, its elevation above the Lower Mercer (blue) limestone 
is the best guide we possess, the Ferriferous being due at about 100 
feet, and the Putnam Hill at 60 to 80. 
In western Monroe and Knox townships, a massive sandstone, 25 
feet thick, comes between the gray limestones, and one or both of the 
latter are cut away, as at Thos. Miller’s and A. A. Taylor’s (Fig. VI). 
The same occurs on Wayne Hill (Fig. III). This sandstone (Hecla ?) 
caps the hills north of Black Creek, weathering out in great “‘boulders”, 
but similar masses from the Massillon sandstone, 100 feet lower, abound 
in the valleys of Wolf Creek, Black Creek, the Killbuck, Indian Trail, 
etc. In Fig. III this heavy sandstone was supposed to cover coal No. 
6, but the coal is evidently No. 4, as it is just below the level of 
the Putnam Hill limestone on the adjoining farm of A. Erenheiser, as 
