90 OIL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
parison of elevation was made for determining the interval between 
the base of the Pittsburg coal and the top of the Meigs Creek coal. 
This was on the ridge south of Island Creek and resulted in a meas¬ 
urement of 103 feet. 
Ames limestone and associated rocks .—The Ames limestone is well 
developed throughout almost the whole of Island Creek Township. 
It is exposed in a heavy ledge on the nose of the ridge to the north 
of Costonia, and from this place can be easily followed on both sides 
of Island Creek and its tributaries. It goes under cover near the 
point where the Island Creek road leaves the creek and climbs to the 
Richmond pike. To the west of the forks of Wills Creek the lime¬ 
stone is well developed, but on this stream east of the forks and in 
the neighborhood of Stanton Park it was not found in solid beds, 
though the adjacent coal beds were noted in Rush Run and some 
small pieces of limestone float were found. A number of compari¬ 
sons of elevation were made to determine the interval between the 
Ames limestone and the Pittsburg coal, as follows: 
Distance between base of Pittsburg coal and top of Ames limestone, Island 
Creek Township, Ohio. 
Feet. 
Between Shelley Run and the ridge road to the south_227 
On Island Creek oil field_218 
On hill west of Pekin_230 
On ridge between two branches of Island Creek_228 
On Hartley Run and hills on both sides_222 
On Wills Creek, Little Island Creek, and ridge between_206 
On Wills Creek_214 
Comparisons of four elevations of Ames limestone on North Fork of Wills 
Creek with three elevations of Pittsburg coal on different sides_223 
Comparison of elevation of Ames limestone on Cedar Lick Run with that of 
Pittsburg coal south of Two Ridge Church___215 
Average___220 
On Little Island Creek and Rush Run is another limestone about 
30 feet above the Ames limestone. It has a smooth surface, is yellow 
in color, devoid of fossils, and is underlain by 4 to 6 feet of fire clay. 
Finley coal bed .—The Finley coal is 5 feet thick on the lower por¬ 
tion of Island Creek, and is mined in a small way on both sides of 
the creek. Both up and down the stream it thins rapidly, soon 
becoming only a few inches in thickness. 
Roger coal bed .—The Roger coal outcrops at the iron bridge over 
Island Creek, 1 mile from its mouth, and may be followed down the 
stream and along the river hills north to Jeddo; also on the hills 
back of Toronto. 
