256 EECOKD OF DEEP- WELL DRILLING FOR 1905. 
Catskill — Continued. Feet. 
White shale 2, 870-2, 875 
Dark sandstone, Flat Run sand 2, 875-2, 885 
White shale 2, 885-2, 895 
Limestone 2, 89.5-2, 905 
Red rock 2, 905-2, 915 
Sandstone, Fourth sand 2, 915-2, 920 
White shale 2, 920-2, 935 
Sandstone, Fifth sand 2, 93-5-2, 945 
Shale^ 2, 94.5-2, 955 
Limestone 2, 955-2, 960 
Red rock 2, 960-2, 970 
Chemung: 
Hard dark sandstone 2, 970-2, 985 
White shale 2, 985-3, 000 
Limestone. 3, 000-3, 010 
White shale. 3, 010-3, 025 
Dark sandstone 3, 025-3, 035 
Black shale 3, 035-3, 045 
Limestone 3, 045-3, 060 
Black shale 3, 060-3, 090 
Limestone. ; 3, 090-3, 105 
White sandstone, "Bayard " 3, 105-3, 120 
White shale 3, 120-3, 165 
Limestone 3, 165-3, 180 
Hard black sandstone 3, 180-3, 190 
White shale 3, 190-3, 215$ >j 
Dry hole. 
1350. Well at Slate Run, Lycoming County. 
[Well begun April 11, 1905; drilling stopped May 11, resinned August 30; well completed September 25, '! 
1905. Authority, \Y. E. Sandborn, superintended Tidewater Pipe Company, owner. Samples 
preserved. Log compiled from samples by S. Sanford. Geologic correlations by R. W. Stone.] I 
This deep well gives a section in the Blossburg syncline, a broad fold the axis of which 
passes west of the well. The formations penetrated are of Devonian age and include th( 
lower part of the Catskill-Pocono group (the Cattaraugus formation of Tioga County to tht ; I 
northwest) and part of the Chemung formation. The Cattaraugus formation is character j j 
ized by red shale and red, brown, and gray sandstones and the Chemung by gray or greenisl ' ; 
shales and sandstones. The character of these rocks in Tioga County is described in th j 
Elkland-Tioga folio (No. 93) of the Geologic Atlas of the United States. 
Record of well No. 1 on J. B. Tomb farm. 
Cattaraugus: Feet. 
Hard gray sandy shale; much fresh water 50- 10 
Hard brownish-red sandy and limy shale . 106- 14: 
Hard red and brown sandstone with limy layers 146- 1( 
Hard gray sandy and limy shale. 161- 1( 
Hard red limy, shaly sandstone; large pieces of "red rock "and pebbles 
at 181 feet 166- 
Hard fine drab limy sandstone 186- 
Hard fine brownish-red sandstone 209 2! 
Hard reddish-gray shaly sandstone to 240 feet, brownish-red below 229 2 
Hard red sandy shale to 270 feet, reddish-gray below 250 %% 
Hard fine gray sandstone 290- 3 , 
Hard reddish-gray shaly sandstone to 332 feet, red below 310- 3 > | 
