116 OIL AND gas; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
FINDLEY AND NORTH FAYETTE TOWNSHIPS, ALLEGHENY COUNTY. 
Parts of the townships of Findley and North Fayette, of Alle¬ 
gheny County, are included in the northeast corner of the Burgetts- 
town quadrangle. The surface of these townships is about equally 
divided between the lower half of the Monongahela formation and 
the upper half of the Conemaugh. 
Monongahela formation .—The Pittsburg coal outcrops in all parts 
of North Fayette Township and throughout Findley Township, 
except for a distance of 2 miles on the west edge. The coal maintains 
a thickness of about 5 feet. The upper division and the Rider coal 
are absent throughout most of the area of these townships. In North 
Fayette and the southeast corner of Findley the Monongahela forma¬ 
tion is thick enough to bring the different beds of the Benwood lime¬ 
stone to view on the higher ridges. Both the Dinsmore and Bulger 
limestones are prominent in the ridge to the south of Santiago and in 
the top of the knobs 2 miles northwest of that town. 
Conemaugh formation .—The Pittsburg limestone is present at T to 
20 feet under the coal. In a few localities a limestone bed was noted 
at an interval of about 120 feet below the Pittsburg. The streams do 
not cut deep enough into the Conemaugh formation to reach the hori¬ 
zon of the Ames limestone, except in Potato Garden Run, a mile and 
a half from the west edge of Finley Township. Here the Ames lime¬ 
stone appears in outcrop, and may be followed down the creek to the 
township line. 
Subsurface rocks. —Little information was procured with reference 
to subsurface conditions. A number of wells have been drilled in 
these townships, but the records of only a few could be obtained. 
ROBINSON TOWNSHIP, WASHINGTON COUNTY. 
Robinson Township is the northeasternmost township of Washing¬ 
ton County. The surface is about equally divided between the 
Monongahela and the Conemaugh formations. 
Pittsburg coal .—The Pittsburg coal outcrops throughout the town¬ 
ship, except in the northwest corner. An exposure of this coal can 
be found on nearly all the roads and ridges. It was the only stratum 
used for determining the structure within its area of outcrop. The 
Redstone coal shows as a small blossom in the central portion of the 
township. In the southeast corner of the township the formations dip 
so that the Sewickley coal -and some of the beds of the Benwood lime¬ 
stone show in the higher hills. Measurement of the distances of these 
strata above the Pittsburg coal was made at one point only. This was 
1 mile east of Candor, and the measurement showed the Sewickley 
coal to be 97 feet and the Bulger limestone 169 feet above the base of 
the Pittsburg coal. 
