STRATIGRAPHICAL ORDER. 105 
Ft. In 
Coal—Lower Freeport, general but thin (No. 6a—No. 6b)..........00 1 
Inmestone—Lower Freeport, Norris limestone............ssesesseseeoeeees 0 6 
Interval consisting of— 
SandstoneVvorsitaleweasers eset eee ceccestcsdeeo casserole soneecelet ce 25 
lavas) (O20) PAD i500000500006600000.680065900 066500680000 640000000035 05080 9o0S8BcII00 10 
Coal—Middle Kittanning (No. 6)................0ssssesscsccesseceescsceseeeees 10 
Shales, holding Snow Fork Kidney Ore.......0. ..sccssscessessssceseeees 8 
Hint Ge raviallencnscmecscccutcecocorwececececstaceemesenee esos sea se) ec desseecietemseates. 18 
Coal—Lower Kittanning (No. 5)............scsecseescoees Givettetacecsnecstbess 3 
WWalnite mel ayarec seen iectetuacoccrcncae ss, secs cnc sigersscvescedeseerusssagensetes 12 
Ore and Limestone—Ferriferous limestone, Baird ore............00.0000 1 
The Upper Freeport or Shawnee limestone becomes one of the 
most reliable guides to the geology of the Hocking Valley. It is well- 
nigh universal in its distribution, and is so well characterized that its 
outcrop can scarcely be missed. 
Passing from Shawnee to the Sunday Creek Valley, we find the 
same section in substance. As usual, the blackband is on the margin 
of the Upper Freeport seam, while a well-developed coal field lies in 
the interior. The Bayley’s Run coal and the Norris coal, which are 
one and the same seam, represent the Upper Freeport in this interior 
development. The Lower Freeport is seldom workable. In fact, no 
Instance is known in which this seam is mined in this region. The 
Upper Freeport limestone is found about half-way between the Upper 
and the Lower Freeport coals. The Norris coal, so called, got its name 
from quite extensive country banks near Millerstown. The Ohio Cen- 
tral Coal Company has developed this region by the opening and 
working of this seam in the large way. The twin mines, No. 12, are 
opened on a farm adjoining the Norris lands, and no one can doubt the 
identity of the coals in these two areas. In the railroad cut above the 
mine, the Upper Freeport limestone and the Lower Freeport coal are 
both fully shown, while the Upper Freeport coal is reached directly 
above. ‘The section here is as follows: 
Ht; Int 
Sandstone—Mahoning. 
Shalesiover coal (2) to WO feet). ccccnscccdtescosicsscssescosceceSeceseosies sess 10 
Coal—Upper Freeport, Norris seam, Bayley’s Run................00.+5 6 
Hre-ClavaamGeshaleuracncst.ucsscscocccscdelcescchcooteecsccslevececaseeeseceacs 18 
Limestone—Upper Freeport, Shawnee limestone.............s.cccesseeess 2 
Fire-clay and shale, with irom Ore .,..........00c00cssssssesccoese svccsenes 12 6 
Sandstone 
