98 OIL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
Pittsburg coal .—The Pittsburg coal outcrops throughout Cross 
Creek Township. In the northwestern part, in the vicinity of Wheel¬ 
ing Junction, it is near the tops of the hills, but dips to the southeast 
and is about halfway down the slopes at Cross Creek and reaches 
water level in Pierce Run at the south edge of the quadrangle. The 
average thickness of the coal is fully 5 feet. It is overlain bv the 
Pittsburg sandstone, which is from 20 to 30 feet thick. The over- 
Ivins; limestone and the Rider coal are absent in nearly all of this 
area. 
Ames limestone .—The Ames limestone is well developed on both 
sides of Harmon Creek, along Cross Creek, and east of Ohio River 
back of Wellsburg. It is usually accompanied by its two coals, one 
20 feet below and the other from 10 to 20 feet above. Jhe only poi- 
tion of Cross Creek Township in which the limestone is not well 
developed is in the vicinity of Wheeling Junction and New Cumber¬ 
land Junction. The following comparisons of elevations were made 
for determining the thickness of the interval between the Pittsburg 
coal and the Ames limestone: 
Distance between base of Pittsburg coal and top of Ames limestone, Cross Creek 
and Buffalo townships. West Virginia. 
Feet. 
On road south of Colliers Station- 219 
On road south of Harmon Creek-210 
On road to ridge east of Colliers Station-223 
On pike south of Colliers-224 
On ridge west of Colliers, coal compared with the average elevation of four 
outcrops of limestone-210 
On road northeast of Mahan-224 
On road up ridge between Painters and Titt runs-226 
On hill east of Wellsburg-218 
On hill east of Lazearville--- 215 
Average_219 
Cambridge limestone .—Only one outcrop of the Cambridge lime¬ 
stone was found in this area. It occurs in the small run entering 
McMahan Run at Lotver Ferry. Its position is 97 feet below the 
Ames limestone. 
