204 PETROLEUM AND NATURAL GAS. 



In the elevation column the letter "B" indicates an aneroid 

 barometer determination checked on the nearest spirit Ieve4 

 point, and the letter "L" indicates a hand level determination 

 from a near by point, all elevations being expressed in feet 

 above sea level. All depths to the Pittsburgh Coal and the 

 oil sands are expressed in feet. Under the producing sand col- 

 umn, the following abbreviations are used : 



L D .Little Dunkard. 



B ' D " ' Bi g Dunkard. 



Gas gg" ' Gas Sand. 



II Cow Run.'.'.'.'.'.'. .' Second Cow Run - 



Max Maxton._ 



L. Lm. 



.Little Lime. 



j Lm Bi S Lime. 



Knr Keener. 



B i Big Injun. 



Qnz.' .'.'*.'.'*.'.'.*.'...... Gantz - 



50-f t Fifty-foot. 



30-ft Thirty-foot. 



gtray Gordon Stray. 



Gord Gordon. 



4th. .. Fourth. 



5th Fifth. 



6th Sixth or Bayard. 



In addition to the abbreviated records of the table, numer- 

 ous detailed logs will be given in the following pages, show- 

 ing, as far as obtained, all the sands and formations encoun- 

 tered, as well as coal seams, water horizons, casing and pres- 

 sure records. The records of some of these wells are defec- 

 tive, lacking many important horizons that should have been 

 noted, but most of them have been well kept and are good. 

 The large number of complete records available has made it 

 possible to correct many local errors of correlation, and nu- 

 merous changes of names of the sands and coals have been 

 made. 



Detailed Well Records, Hackers Creek District. 



Hackers Creek District is situated in the northeastern 

 part of Lewis, next to Harrison, and is traversed by both the 

 Wolf Summit and Chestnut Ridge Anticlines, causing it to be 

 a great gas region. No oil of paying quantity has been found 

 except- at the extreme southern end along the Grassland Syn- 

 cline. The production is not confined to one stratum, but 



