Record of Geology op Texas, ISS'Z-ISQG. 
149 
Hill, Robert T. 
its econiomie resources. Extract from tire recently printed Encyclopaedia 
Brittanica upon the resources of Texas. 
204. — 
Hotes on the Geology of Western Texas. 
Geological land Scientific Bnlletin, Vol. I, Ho. 6. Houston, 
Oct., 1888. 
The prairie and mountainous areas of western Texas, as along the Texas 
and Pacific railway, furnish a rich ifield for scientific investigators. From 
Millsap to lOisiCO the prevail ing rocks are Upper Oarlhoniferous. General west- 
ward dip of the Carhoniferous strata. Topography near Cisco. The ‘Ted 
Beds” west of Cisco. The Permian and the Jura-Trias. The continuation 
of the great plains west of Sweetwater — Tertiary or Quaternary. The line 
of Cretaceous buttes and mesas south of the railway. Extent. Mourn 
tains west of the Pecos. Eruptive and sedimentary material. Quaternary 
and Post-Quaternary lake basins. Evidence afforded by the State of 
Quaternary and Post-Quaternary ■ phenomena. Distribution of the Post- 
Glacial Mastodon from El Paso to Dallas, and from Wichita to the Rio 
Grande. Pre-Cretaceous beds of lignite. Boundaries of the areas of posi- 
tive knowledge brought by the Arkansas 'Survey of the Texas frontiH. 
‘‘Since writing the foregoing I have made another trans-section of the 
wonderful west Texas region. This time from Texarkana westward to 
Henrietta, and from thence northwest, over the plains and up the valley 
of the Canadian to Tucumcari mountain, in New Mexico, * * It is 
sufficient to say, however, that this journey not only verifies the geologic 
phenomena along the Texas Pacific, but elucidates them so clearly as to 
render them conclusive. The surface of the Llano Estacado is an early 
quaternary loam, and a direct continuation of the great plains of Kansas 
and Nebraska, while the white-matrixed conglomerate above alluded to, 
which appears so clearly as the surface of the valley dividing the north 
and south plains, is a later quaternary deposit.” P. 4 of reprint. 
A geological interpretation follows. 
For review, see Amer. Geologist, Vol. Ill, pp. 51-52. 
University of Texas. School of Geology. 
'Circular Ho. 1, p. 1. Austin, 1888. 
This circular was designed to accompany Bulletin No. 45 of the United 
States Geological Survey, entitled .“The Present Condition of Knowledge 
of the Geology of Texas.” Since the writing of this Bulletin, 1885, much 
has been added to our knowledge of the State. The accompanying reprint 
from the Texas Scientific Bulletin for November [Oct. ?], 1888, indicates 
the character of some of these observations. 
“Among other subjects of recent discovery of interest to stratigraphic 
geologists may be mentioned the following: 
“1. The occurrence of the undoubted Laramie of the Colorado region 
along the Texas side of the Lower Rio Grande. 
“2. The demonstration of the chalk origin of the Texas Cretaceous 
