STRATIGRAPHICAL ORDER. 65 
We may safely follow the clue furnished by the two coals disclosed 
in the boring made by Mr. Somerville at Rochester, and which have 
been identified provisionally as the Middle and Lower Kittanning coals, 
by reason of their positions in the series. 3 
In coming down from the Sandy Summit to Bayard, we descend 
over 100 ft. (Bayard, 503 ft, above L. E.), but not low enough to reach 
the coals reported in the Rochester boring, which are 462 ft. and 422 ft. 
above L. EK. To find lower ground, we must descend the Big Sandy 
Valley. The railroad grade drops 23 ft. in reaching Minerva, 2 miles 
below Bayard (480 ft. above L. E.), and here just outside the limits of 
the corporation, on the south side of the creek, the upper of the two 
coals comes to day, with an altitude of 469 ft. above L. KE. On the 
same farm (James Carson’s), the Lower coal is also found, level. 
with the water, at approximately 440 ft. above L. E. The upper seam 
is being mined here at the present time. It has a thickness of 2 feet 
to 24 feet. 
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