vaughan] EAGLE PASS COAL FIELD. 57 
Owen measured sections of the coal bed at three places in the Hartz 
coal mine, 5 miles northwest of Eagle Pass. At one place there were 
4 feet and G inches of good coal, without any division of slate; at 
another place there were 5 feet and 4 inches of coal, with three divi- 
sions of slate aggregating 14 inches, leaving 4 feet and 11 inches of 
coal; at a third place the stratum was 7 feet and 3 inches thick, with 
five divisions of slate aggregating 11 inches. This gives a coal stratum 
with an average thickness of over 5 feet. 1 
The seam mined in the shaft of the Maverick County Coal Com- 
pany is, according to Mr. George Bregg, the manager, 6 feet thick. 
He did not state whether there are any divisions of slate or bone. The 
coal is overlain by clay and underlain by sandstone. The seam in the 
Fuente mines (Mexico), opposite Eagle Pass, is 4 to 5 feet thick, and 
is both overlain and underlain by clay. Six feet of coal were passed 
through in boring the artesian well near Eagle Pass. 
Mr. Louis Dolch, of Eagle Pass, furnished the accompanying sketch 
map (p. 56) showing the location of the prospect shafts sunk for coal. 
The following are the detailed sections through the coal seams, 
given by Mr. Dolch: 
Prospect shaft No. 1. 
Ft. in. 
Depth to coal 90 
Coal 29 
Slate 6 
Coal 16 
Slate 4 
Coal 34 
Slate 4 
Coal 4 
Total coal and slate 97 
There are 83 inches of coal, with three divisions of slate. 
Prospect shaft No. 2 
F J Ft. in. 
Depth to coal 1 34 
Coal 32 
Bone 13 
Coal 8 
Bone 2 
Coal 24 
Total coal and bone 79 
A total of 04 inches of coal, with two divisions of bone. 
1 First Rept. of Progress of Texas Geol. Survey, 1839, p. To. 
