DETAILED RECOKDS. 259 
Feet. 
Slate 1, 450-1, 500 
3and 1, 500-1, 585 
Slate and limestone 1, 585-2, 500 
Elevation of well, about 2,200 feet. Casing used, 300 feet of 8|-inch ; 600 feet of 6|-inch; 
1,600 feet of 5J-inch. Principal water bed was in gravel at 40 feet. Well abandoned and 
plugged at 2,500 feet. 
1369, Well near Grand Valley, Warren County. 
Well completed February 29, 1888. Authority, J. G. Winger. Incomplete series of samples preserved.] 
This is a record of one of the deepest wells put down in the Grand Valley oil field and is of 
interest as showing the character of the rocks underlying the Third sand, in which most 
wells in the field stopped. The rocks, including the three oil sands, have been called the 
'Venango oil group." They belong to the Catskill-Pocono group and their exact age, 
whether Carboniferous or Devonian, is more or less in doubt. 
Record of well No. 1 on Zanefarm, lot No. Ufl, Eldred Township. 
Feet. 
sort yellow clay 0- 20 
:Iard gray and black shale and sand 20- 262 
Soft, generally black sandy shale 262- 411 
i5oft gray sandstone, Second sand; show of oil and very small show of gas and 
| salt water. 411- 459 
piack and blue soft shale 459- 642 
lard red sand, upper part of Third sand; oil and gas are frequently found in 
this bed near Grand Valley ... 642- 646 
jray sand; hard and contained gas from 646 to 649 feet; soft and slight show 
of oil below, bottom of Third sand 646- 655 
lard black shale 65.5- 765 
i>oft red and brown shale 765- 965 
'lard gray and black sand 965-1, 340 
ilard black shale 1, 340-1, 368 
j Rig used, standard. Casing used, 262 feet of 5|-inch. Fresh water from 50 to 200 feet, 
nitial yield of gas, 60,000 feet; rock pressure, 30 pounds per square inch. 
1371. Well near Grand Valley, Warren County. 
ell begun September 29, 1905; completed October 13, 1905. Authority, Josiah G. Winger, contractor. 
Samples preserved.] 
This carefully kept log of a well in the Grand Valley field mentions an unusual feature, a 
jail of water from 80 to 160 feet. The well, though shallow, shows the character of the 
econd and Third sands of the "Venango oil group" at this point. The rocks are included 
Ji the Catskill-Pocono group and are of Carboniferous or Devonian age. 
Record of Dunderdale well No. 18 in borough, of Grand Valley. 
Feet. 
oft yellow clay - 15 
oft bluish shale 15 - 70 
ard, fine gray sandstone, First or Mountain sand; fresh water at 80 feet rushes 
into hole and falls to 160 feet, the water level 70-89 
ard gray shale 89-310 
ard, fine gray sandstone, first member of Second sand 310 -320 
)ft gray muddy shale, second member of Second sand 320 -340 
ard gray sandstone, third member of Second sand 340 -350 
