XXVI REPORT OF THE STATE GEOLOGIST. 



northwest to the Staked Plains, beyond Dockum's Ranch, and is to be 

 carried from that point northeast to Wichita Falls. 



Mr. R S. Tarr was appointed in September to make a more thor- 

 ough and detailed survey of the southern part of the Central Coal 

 Field, the results of which appear in his paper accompanying this report. 



EAST TEXAS. 



Mr. Penrose spent the early part of the year in the detailed investi- 

 gation of the iron ore localities of Cherokee County. Finding that the 

 exact relations of the various deposits could not be made out in that 

 region on account of the character of the topography and timber growth, 

 he was instructed to make three river trips for the purpose of acquiring 

 the facts requisite for this purpose. The first of these trips, on the 

 Colorado River from Austin to La Grange, was made by Mr. Penrose 

 and myself (accompanied by Mr. Hill as far as Bastrop) ; the second 

 was made by Mr. Penrose, alone, down the Brazos River, from Waco 

 to Hempstead. The third and longest was that which I made with 

 Mr. Penrose down the Rio Grande, from Eagle Pass to Hidalgo or Ed- 

 inburgh. On this trip we were accompanied by Mr. L. L. Foster from 

 Eagle Pass to Laredo. These trips yielded us results of great value, 

 the greater part of which appear in the report of Mr. Penrose. 



Mr. Penrose left the Survey July 1, and Mr. G. E. Ladd was ap- 

 pointed to study and map the iron ore deposits of East Texas. After 

 having worked over Upshur, Wood, Van Zandt, Marion, and Ander- 

 son counties, he resigned from the Survey. Mr. A. Gr. Taff was then 

 appointed to continue the work, and took up the mapping of the Cass 

 County deposits, which, however, he did not complete, having had to 

 leave the field on account of sickness. 



CENTRAL MINERAL DISTRICT. 



Mr. T. B. Comstock was given the special work of the geology of 

 this district, which was, as we supposed, fully covered by the topo- 

 graphic maps of the United States Geological Survey. Finding, how- 

 ever, that the details were not sufficiently accurate for the complica- 

 tions he found in the work, a topographic corps, under Mr. J. C. Nagle, 

 was added. The work was much retarded on account of having to run 

 so many lines, and at the end of his engagement, which was only for 

 three months, Mr. Comstock was appointed geologist on the Survey 

 and put in charge of the district. The results of his work are of great 



