120 OTL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
Conemaugh formation. — Below Pittsburg limestone is shale with 
no distinctive marking strata for a distance of about 100 feet. At 
this horizon in the vicinity of Bavington is a coal bed of variable 
thickness to which the name Bavington coal has been given. This 
lies in shale and varies abruptly in thickness from a knife-edge to 
5 or 6 feet. At an outcrop near the iron bridge over Raccoon Creek, 
on the valley road from Burgettstown to Bavington, it has a thick¬ 
ness of 26 inches. On the east side of Martha McBride’s farm at 
Bavington this coal has a thickness of more than 5 feet and is 
opened for mining. The same coal shows in outcrop in the run west 
of Bavington and also at the head of Brush Run. The interval 
between it and the Pittsburg coal is not regular. The following 
comparisons of elevations were made: 
Distance between top of Bavington coat and base of Pittsburg coal, Smith 
Township , Pennsylvania. 
Feet. 
On Raccoon Creek south of Bavington__115 
East of Bavington_ 136 
West of Bavington _ 96 
Average- 116 
Subsurf ace stratigraphy .—The well records of the township show 
the top of the Salt sand to be somewhere between 850 and 940 feet 
below the Pittsburg coal. The Big Injun sand comes in at about 
1,050 feet below the coal and has a thickness of 230 to 290 feet. 
Below the bottom of the Big Injun is a fairly regular interval of 
540 feet to the Hundred-foot sand. In this interval is the Squaw 
sand, the Thirty-foot shells, and the “ red rock.” The top of the 
red rock is a little less’ than 100 feet above the Ilundred-foot sand. 
The top of the Thirty-foot shells is 260 to 300 feet above the Hun¬ 
dred-foot sand. 
Theie is some doubt as to whether the 1 lnrty-foot shells repre¬ 
sent the Berea sand. The distance from this bed down to the “ red 
rock ” as found in this township is nearly a hundred feet too great. 
JEFFERSON TOWNSHIP, WASHINGTON COUNTY. 
Jefferson Township is situated south of Harmon Creek, on the 
western side of the quadrangle. It extends beyond the quadrangle 
boundary to the West Virginia line. The surface of the township 
is mostly in the Monongahela formation, though a section of 200 
feet of the Conemaugh formation is shown in the deeper valleys of the 
principal creeks. Because of the dip of the rocks to the southeast, 
the tops of the highest hills along the east edge of the township are 
still capped by the Washington formation. Throughout the western 
and southern parts ,of the township the Waynesburg coal underlies 
most of the higher hills. 
