GENERAL GEOLOGY OF STEUBENVILLE QUADRANGLE. 
31 
CONVERGENCE S11EET. 
1 lie method of construction and use of the convergence sheet has 
been described on pages 23-25. The records obtained from each well 
from which the convergence sheet is made are given in Part II of 
this volume (pp. 99-113). It is here necessary only to consider two 
records, which were obtained but not used for the following reasons: 
AA' ell No. 117 is on the farm of Joseph Sapp, on Croxton Run. It 
is 1 mile west of well No. 119 and 2 miles east of No. 71. The eleva¬ 
tion of the mouth is 1,053 feet. The Ames limestone outcrops a short 
distance from the well at an elevation of 1,009 feet, or 11 feet below 
the mouth of the well. The Berea sand is recorded in the log at 
1,000 feet. This gives a distance of 956 feet from the Ames limestone 
to the Berea sand and 1,178 feet from the Pittsburg coal to the 
Berea. This distance seems too small by nearly 200 feet. The well 
was drilled below the Berea sand and to a depth of 1,455 feet. Red 
roeluis noted in the log at 280 feet below the Berea. This is 120 
feet greater than the interval between the Berea and red rock in well 
No. 149. This abnormal interval indicates that there is some mis¬ 
take in the position of the Berea as given bv the log. For this 
reason the Well was not used in making the convergence sheet. 
Log of Joseph *S Uipp well {No. JJ/7). 
Limestone and red rock. 
Sandstone.. 
Slate . 
Salt and red rock. 
Sandstone (showed black oil) 
Slate. 
Sand, Berea. 
Slate and hard shells. 
Red rock. 
Slate gray. 
Shale black. 
Top. 
Bottom. 
Feet. 
Feet. 
0 
100 
100 
150 
150 
300 
300 
700 
700 
780 
780 
1 000 
1,000 
1,040 
1,040 
1,320 
1,320 
1,330 
1,330 
1,340 
1,340 
1,455 
Well No. 488 is on the farm of Sophie Wright, south of Colliers 
Station. The Berea sand is reported in this well at a depth of 1,490 
feet. The elevation of the well mouth is 1,067 feet. The Pittsburg 
coal outcrops near the well at an elevation of 1,137 feet, or 70 feet 
above the mouth of the well. According to the record of this well 
the Berea sand is 1,560 feet below the Pittsburg coal. The well is 
within the triangle made bv wells Nos. 485, 491, and 295. Well No. 
485 found the Berea at 1,600 feet below the Pittsburg coal; well 
No. 295 of the Burgettstown quadrangle found it at 1,637 feet, 
and well No. 491 at 1,634 feet. These distances are all greater than 
that found in well No. 488. As the well was carried to the lower 
sands, it is thought there may have been a slight error in the meas- 
