64 GEOLOGY OF OHIO. 
Hleavydsandrockesuscestths cotelvecsscstomtetecmece 
Coal, 1’ 6” to 4 5/6” 
2. Upper Freeport coal < Shale, 17% to 2/7 [ c7r7rerree teers 
Coal, 2 to 17 4” 
3: (Pire-claygand shaleveecccccccscceccecescoscest ste scccceetace cee: 25/ 
4, * Upper Freeport limestone (?).........ccccscscsssscscsccssovescoessecs 1/-3/ 
Dp eats] 0 anc otaacdactig SHsasec Sc HEHe oH ERE CEURTOEEER gen Adee umaricdas oR cocuctbonoons 5/ 
6. Coal outcrop, cannel. 
Whether No. 6 in the section represents the Lower Freeport coal 
is uncertain, as this element has but a feeble development throughout 
this region, though its limestone is frequently found, but it may be so 
counted provisionally. On the south side of the divide, the two Kittan- 
ning coals are found at 125 ft. and 150 ft. approximately below the 
Upper Freeport coal. A boring made by Mr. Somerville at Rochester 
shows two seams that hold the exact places of the Kittanning coals, 
the section being continued downwards from the cannel coal last named: 
7. Sandstone, shale and fire-clay..............s.cece sescecscceces ieedustenee 867 
8. Middle Kittanning or Darlington Coal..............cccesessesesseeees 2a Om 
9. Shales etewncc..teanssscksecess cosceslens eee lee nee et enaate AAU ue ee anne 38’ 
10. Lower Kittanning coal, hard and clear ..............sscscsessesecees ra 
The same facts can be represented in another form: 
Upper Freeport coal (118 ft. interval). 
Middle Kittanning (?) coal (40 ft. interval). 
Lower Kittanning (?) coal. 
The last-named seam is thus seen to be 158 ft. below the Upper 
Freeport coal. In the Hammondsville section it will be remembered 
that the interval between the Lower Kittanning and the Upper Free- 
port coals is close to 150 ft. 
The elevation of the Somerville coal above Lake Erie is 585 ft. 
The Middle coal is accordingly 462 ft. at this point, and the Lower 
coal 422 ft. above the same base. The Upper coal rises a little higher 
before it reaches the Sandy Summit where its elevation is not far below 
600 ft. As the coal now lies high in the hills, it is of course cut out by 
the Sandy Valley, which the railroad crosses, but to the northward, 
both coal and limestone are found as soon as summits are reached that 
are high enough to hold them. Both elements also hold their places 
continuously to the westward from Rochester, through Augusta and 
Brown townships of Carroll county. 
* Found in adjoining farms. 
