DEVONIAN SERIES. 
33 
BEDS LOWER THAN THOSE PENETRATED IN THE AMITY QUADRANGLE. 
The deepest well in the Amity quadrangle penetrates to a depth of 
2,664 feet below the Pittsburg coal, or about 650 to 700 feet below the 
Elizabeth sand, and but scanty data are given about the beds below 
the Elizabeth. The nearest point at which anything is known of the 
underlying beds is at West Elizabeth, Allegheny County, 12 miles 
southeast of Pittsburg, where a well on the William Bedell farm was 
drilled to a depth of 5,575 feet. As this is the deepest well in the 
United States, and as it furnishes a key to the geology beneath Wash- 
ington County, the record is given here in full, with geologic interpret- 
ations. The mouth of the well is 130 feet below the Pittsburg coal. 
Record of deep well near West Elizabeths 
Formation. 
Record. 
Thickness. 
Depth. 
Slate 
Feet. . 
40 
10 
80 
105 
30 
40 
3 
100 
% 
75 
40 
10 
2 
25 
65 
15 
3 
10 
30 
15 
50 
35 
5 
95 
115 
30 
20 
50 
310 
60 
15 
5 
18 
50 
60 
10 
Feet. 
40 
50 
Shale 
130 
235 
Sand 
265 
Slate 
305 
Coal (Baker stown?) 
308 
Slate 
408 
410 
Slate 
485 
Sand 
Shale 
525 
535 
537 
Slate 
562 
627 
Shale 
642 
Coal (Middle Kittanning?) 
645 
655 
Slate 
685 
700 
Slate. 
750 
785 
^Slate . .' 
790 
[Sand, Salt 
885 
Pottsville 
isiate 
1,030 
1,050 
1,100 
1,410 
1,470 
Sand 
1,485 
Slate 
1,492 
Sand 
1,497 
Slate 
1,515 
Sand (Thirty-foot or Berea) 
1,565 
1,625 
Limestone 
1, 635 
« White, I. C., West Virginia Geol. Survey, vol. 1 (a), 1904, p. 104. 
Bull. 300—07 3 
