93 
DETAILED GEOLOGY OF STEUBENVILLE QUADRANGLE. 
Benwood limestone. —The lower beds of the Benwood limestone 
are present in the summits .of the hills between Wells Run and Cross 
Creek. 
Meigs Greek coal. —The Meigs Creek coal is present in the hill 
north of Cross Creek and also between Cross Creek and Georges Run. 
Pittsburg coal. —The Pittsburg coal does not occur in this town¬ 
ship north of Steubenville. West of Steubenville and north of Per- 
mars Run it is present near the summits of the hills. From this 
locality southward it is present in all the hills and outcrops in the 
top of the river bluffs between Steubenville and Mingo Junction. 
The coal is about 5 feet thick and it is accompanied by both the upper 
and lower limestones. The lower limestone is unusually heavy. 
Ames limestone. —The Ames limestone is by far the best geologic 
marker in Steubenville Township. It is prominent and well devel¬ 
oped from Alikanna to Georges Run. It outcrops in the hillsides 
south of Alikanna and can be followed along the bluff above the 
river. It is about halfway up the slope below La Belle View and 
shows in strong outcrops in Permars and Wells runs. It is present 
in the bluff’ just above the pike from Steubenville to Mingo Junction. 
On both sides of Cross Creek it is well developed. On the sides of 
Georges Run it is not so prominent, but can be located by a little 
search. The following comparisons of elevation were made for 
determining the interval between the Ames limestone and the Pitts¬ 
burg coal: 
Distance between base of Pittsburg coal and top of Ames limestone , Steubenville 
Township , Ohio. 
Feet. 
On ridge between Steubenville and Mingo Junction-218 
Southwest of Steubenville_i-214 
On Wells Run_214 
On Georges Run and hills on both sides-222 
On hill north of Cross Creek_ 218 
WELLS TOWNSHIP, JEFFERSON COUNTY, OHIO. 
Wells Township extends to the south edge of the quadrangle. The 
section exposed extends from the Waynesburg coal of the Mononga- 
hela formation to the Ames limestone of the Conemaugh formation. 
Waynesburg coal .—The highest hills southwest of New Alexandria 
contain the Waynesburg coal near their summits. The coal ranges in 
thickness from 2 to 3 feet and is underlain by yellow limestone. Its 
position with reference to the Pittsburg coal was not well determined, 
though the interval from the top of the Waynesburg coal to the base 
of the Pittsburg is not far from 245 feet. 
