XXVI REPORT OF THE STATE GEOLOGIST. 



Wise County to its southern terminus, continuing the section down the 

 Brazos to the line of Hood County, about ten miles above Thorpe's 

 Springs, thus giving a connected section entirely across the Brazos Coal 

 Field from the Permain on the west to the Cretaceous on the east. 

 From here the party moved back to Palo Pinto and then to Crystal 

 Falls, where the work of tracing Coal Seam No. 7 was again taken up 

 and carried south to Cisco. I was with this party during this part of 

 the work. 



The second line of instrumental section was across the Colorado Coal 

 Field from near the head of Pecan Bayou, where the Carboniferous is 

 overlaid by the Cretaceous, southeast to San Saba. 



Careful measurements were made on the dip of each coal seam at 

 various points, in order to get the average dip. Examinations were 

 made of all mines and prospects within reach of the line, and the out- 

 crops of both of the workable coal seams were mapped as closely as pos- 

 sible in the time allowed for field work. The instrumental work was 

 done by Mr. N. F. Drake, assisted by Duncan Cummins, and the result 

 of the season's work in giving us an exact knowledge of the different 

 members of the Coal Measures, their relations and thickness, has a. most 

 important bearing on the question of coal mining and consequent fuel 

 supply in Central Texas, and has also added greatly to our knowledge 

 of the building stones, soils, and other economic features of the region. 



GUADALUPE MOUNTAINS. 



From all the information at hand concerning the Guadalupe Mount- 

 ains it seemed probable that an examination of them would add con- 

 siderably to our knowledge of the relations of the rock structure of the 

 Central and Western region to that of the Trans-Pecos, and give valu- 

 able information as to artesian well possibilities. Mr. Tarr was, there- 

 fore, instructed to make a reconnaissance of the mountains, and in order 

 to more fully familiarize himself with the section of the Texas Permian 

 to drive from Lampasas to Pecos City, by which route he would cross 

 the entire series of Carboniferous and Permian beds. This part of the 

 trip was satisfactorily accomplished ; but on his arrival at Pecos City 

 it was found that circumstances would prevent the entire completion of 

 the trip as planned, and his work in these mountains was limited to the 

 Guadalupe Mountains proper, and did not include their extensions 

 southward far enough to get the connections desired. He, however, 



