STRATIGRAPHICAL ORDER. 63 
THE CoaL SEAMS OF THE Bia SANDY CREEK VALLEY. 
Returning from the Ohio Valley to the northern margin of the 
coal field, we shall find the most advantageous line of sections along 
and in the vicinity of the Cleveland and Pittsburgh Railroad. 
The series last described can be followed up Yellow Creek to 
Salineville with unmistakable distinctness, as so well shown by New- 
berry (vol. III, p. 100). It is lost in the Yellow Creek Summit of the 
railroad, but its upper members promptly reappear on the northern side 
of the divide as soon as their level is reached. Newberry’s description 
and reference of the coal seams found to the northward can be quoted 
and adopted without qualification. It is as follows: 
“Going north from Salineville toward New Lisbon, the road passes 
over a divide of which the summit is 350 ft. above Salineville Sta- 
tion. . . . Descending the divide toward the north, and coming 
down into the valley of the West Fork of Little Beaver, near Gaver 
Post-office, we find the shales of the Barren Measures succeeded below 
by a heavy sandrock and two coals, the upper 2 ft. 8 in. to 3 ft. thick, 
of excellent quality, and resembling the Salineville Strip Vein (No. 7). 
The second seam, some 60 ft. lower, is not well shown where first seen, 
but further down the stream, toward and at West Point, both these 
coals outcrop and are worked at numerous localities. Beneath the lower 
one, which is five feet in thickness, and separated from it only by the 
fire-clay, is a limestone. This coal can be traced north and east from 
this point to the limits of the county, and is distinctly recognized 
everywhere as the Big Vein. It is our Coal No. 6, the Upper Freeport 
coal of Pennsylvania.” 
The Upper Freeport coal and limestone can be followed westward 
from Gaver’s Post-office to Millport on the Cleveland and Pittsburgh 
Railroad. The interval between the coal and limestone slowly increases 
to the northwest until a maximum of 25 ft. is reached. The coal dis- 
appears temporarily near the railroad, but the limestone is found here 
about 6 ft. above the level of the track. At Kensington, the coal 
comes in again, and the limestone is found 25 ft. below it. It was 
formerly quarried here from the bed of the canal. From this point 
northwards the coal is frequently opened. At Rochester Station it has 
been mined for a number of years by William Somerville. The sec- 
tion here is as follows: 
