54 
Transactions Texas Academy of Science. 
Cummins^ W. F. 
is a continuation of the coal fields of the Indian Territory, Arkansas and 
iMissouri. The strata are composed, as in other 'States, of limestones, 
sandstones, clay beds, shales and coal beds. The characteristic fossils of 
the formation are very numerous,, and in a fine state of preservation. In 
the northern part of this field the strata dip at a slight angle to the 
northwest. In the middle portion the dip is at a small angle to the south- 
west. In the extreme southern field the dip is almost directly to the 
west.” 
* * * * ■» * * 
“There is a western Carboniferous field which is entirely beyond the 
Pecos river. It is found in the IGuaidaloupe mountains, not only on the 
eastern side, as was said by a writer in the June number of the Bulletin, 
but on all sides of them. I have seen the rocks and fossils of the Car- 
boniferous period in all the mountains north of the Texas and Pacific 
Pailroad, in El Paso county. The formation does not extend very far on 
the south side of said road. The mountains just north of the city of 
El Paso are, on their south end, composed entirely of iCarboniferous rocks, 
and give an exposure of nearly eight hundred feet of the strata. The 
strata of this western field are very much disturbed, and dip at various 
angles and in various directions, owing to the proximity or remoteness of 
the locality to the line of Uipheaval. On the highest mountains I have 
seen nothing on top of the Carboniferous, but the foothills are composed 
of the Cretaceous, and in some places show the same disturbance or incli- 
nation of strata as the underlying Carboniferous, This western Carboni- 
ferous formation is entirely barren of coal, and 'I am of the opinion that 
it is useless to look for coal in the Carboniferous rock of the western 
district.” 
63. ( ^ ) 
(The Western Area of the Carboniferous in Texas.) 
Note. 
The Amer. Geologist, Vol, II, p. 138. Minneapolis', Oct., 
1888. 
“According to W. F. Cummins, the western area of the Carboniferous in 
Texas is entiTely barren of coal, and in the foothills the overlying Cre- 
taceous is found to dip conformably with the Carboniferous.” 
Eeport of Geologist for Northern Texas. 
Texas Geol. and Min. Surv. First Kept, of Prog., 1888, pp. 
45-53. Austin, 1889. 
An account of the work begun October I, 1888, which was mainly 
devoted to the .Carboniferous formation. Observations cbmfined to that 
part of the 'State north of the Texas and Pacific railway and east of 
the Pecos river. 'The Carboniferous formation including the Permian. 
Eeport devoted to Upper and Lower Coal OMeasures. Direction of the 
Carboniferous-Cretaceous contact on the east; of the Carboniferous-Per- 
mian on the west. Thickness of Carboniferous strata. Timber growth. 
