634 M. L. FULLER APPALACHIAN OIL FIELD 



Chemung formation. 



Elizabeth or Sixth sand — 2600 



Warren First sand — 2700 



Wa rren Second sand — 2800 



Tiona sand —2900 



Speechley sand —3000 



Balltown or Cherry Grove sand — 3120 



Sheffield or Cooper sand —3320 



Bradford sand —3430 



Second Bradford sand —3480 



Elk sand —3650 



Kane sand —3770 



Of the 37 producing sands enumerated in the table, 15 are in the Car- 

 boniferous and 22 in the Devonian. They are distributed as follows: 



Pennsylvanian : 



Monongahela (Upper Productive) ^ fl 



Conemaugh (Lower Barren) I j 2 



Allegheny (Lower Productive) | j 2 



Pottsville ; ). "White sands" ^ 4 



Mississippian : 



Mauch Chunk (including Greenbrier limestone) . , 

 Pocono 



Devonian : 



Catskill ^ 



Chemung I "Black sands" ^ 11 



The lowest sand at present productive in West Virginia is the Bayard, 

 2,400 feet below the Pittsburgh coal, near the base of the Catskill. The 

 Elizabeth sand yields gas near the Monongahela Eiver in southwest Penn- 

 sylvania, and the Tiona, Speechley, and Bradford sands in the district 

 east of Pittsburgh, but the pools drawing from these formations are 

 mostly in the northwestern portion of the State. 



Ohio. — The highest producing formation in southeastern Ohio appears 

 to be the First Cow Eun sand of the Conemaugh formation. The Salt, 

 Big Injun, and Berea sands are well developed. The lowest important 

 sand in southeast Ohio is the Gordon of the Catskill. The lower sands, 

 including the Elizabeth and Bradford, have mostly pinched out. Most of 

 the producing sands are the same as in adjoining portions of Pennsyl- 

 vania and West Virginia. The largest gas field in the world and some 

 oil pools are found in the so-called Clinton (Medina) of central Ohio. 

 The Trenton does not produce within the limits of the Appalachian field 

 proper. 



11 



