60 
Trat^^sactions Texas Academy oe Science. 
Cummins^ W. F. 
€onnaissanee of tlie Wichita 'Mountain country, Indian Territory. The 
opinion is expressed that the Dockum Beds are the same as the S'hinarump 
Beds of Hayden, a inemher of the Triassic formation in Arizona, and that 
the beds constituting the upper part of the 'Staked Plains are Tertiary. 
No reason to change opinion that all the strata from the Coal Measures 
to the Dockum Beds belong to the Permian. Mr. N. P. Drake had charge 
of the topographic work. 
70. 
• Eeport on tFe Geology O'f Northwestern Texas. 
Second Ann. Eopt. of the Geol. Snrv. of Texas, 1890, pp. 357- 
552; 14 plates; map; 6 figures. 'Austin, 1891. 
Contents:. Introduction. Part I. Stratigraphic Geology. — 'Silurian- 
Devonian; Suh-Clarhoniiferous ; Cairhoniferous ; Permian; Triassic; Tertiary. 
Part 'II. ''E'oonomic Geology — 'Coal; Natural Gas; Salt; Copper ore; Iron 
ore; Gypsum; iBuilding stones; Building materials; Agriculture; Archaeol- 
ogy. Part III. iDeseription of Counties. — ^Young county: Coal; Topogra- 
phy and Drainage; Geology; Soils, Timber and Water; Building Material; 
'Iron ore; Salt. Montague county: Topography and Drainage; Geology; 
Soil; Timber, Water, and Building Material; Coal; Copper and Galena. 
Jack county: Drainage and Topography; Geology; Soil, Timber and 
Water; Building Material; 'Coal. Wise county: Topography and Drain- 
age; Geology, and Soil; Timber, Water, and Building Material; Coal; 
Other Minerals. Parker county : Coal. Palo Pinto county : Topography 
and Drainage; Geology; Soil and Timber; Water and Building Material; 
Natural Gas; CoaL Stephens county: Topography and Drainage; Geol- 
ogy; Soil; Timber and Water; Coal. Brown county:' Topography and 
Drainage; Geology; Soil; Timber, Water and Building Material; Oil; 
Coal. Eastland county: Coal. Coleman county:* Topography and 
drainage; Geology; Soil, Timber, and Water; Building Material; Oil and 
Natural Gas; Coal. Appendix. Hadrophyllum aplatus. 
“The following table will show the formations in this portion of Texas, as 
I have observed them, as compared with the table taken from Dana’s Man- 
uel of Geology, which will give a definite idea of what I intend to represent 
by the various divisions and subdivisions: 
Dana. 
Eecent . . . . 
Tertiary . 
Cretaceous 
Texas. 
.... Eecent. 
, . . Tertiary. 
Cretaceous. 
Juriassic 
Triassic Triassic. 
Permian Permian. 
iOarboniferous Carboniferous. 
Sub-Carboniferous ? 
Devonian 
Silurian .. . .' Silurian. 
“The above table gives the geolegical formations of the northwestern part 
of the State as I now understand it. I have confined my work largely to 
