ix the uppee kio gkakde embayment ix texas. 83 



Cbntbal Section of the Tertiary Deposits ix the Carizzo Si'rixijs 

 Artesian Basin. 



Approximate 

 thickness 

 in feet. 



6. Clays of varying color and texture, with some sand above 



and occasionally lignitic below 250 



5. Sands of somewhat fine texture, sometimes yielding water.... .50 



4. Clays partly of dark color and containing occasional streaks 



of bituminous and lignitic or peaty material 150 



3. Sands giving the principal flow of water, somewhat coarser 



than the upper sand , 125 



2. Clays, with some seams of lignite 50 



1. Sands, yielding water in some deep wells 30 



Lignite. 



The seams of lignite which have been found in the lower part 

 of this section have also been noted in other places. As we pro- 

 ceed to the north and to the west from Carizzo Springs the lower 

 strata rise until we find them exposed in the belt adjoining the 

 area of the Cretaceous sediments, on which they rest. In this belt 

 lignitic coal is reported in several wells, and a small seam has been 

 observed in an outcrop on a hilly slope east of section 122 in 

 block 7. One of the wells going through thin seams of lignite at 

 shallow depth was made near the junction of Salado and Chacon 

 creeks on the F. Wucherer survej'. At this place there were two 

 seams, each about six inches thick, one forty and the other sixty 

 feet below the surface. One of the same seams was penetrated at 

 a somewhat greater depth in a boring about a mile and a half 

 northwest of this place. Some years ago a lignite bed was re- 

 ported from some wells south of survey 1 in block 6, and more re- 

 cently a seam reported to measure four feet was penetrated in a 

 well far to the south near the northwest corner of survey 7 in 

 block 9 at a depth of 220 feet. 



These occurrences of lignite iu the belt of outcrops of the Terti- 

 ary sediments are no doubt only some of the many instances of 

 the same kind, of which no record is known. This lower lignite 

 horizon characterizes the earliest tertiary deposits in the eastern 

 part of the state and in Louisiana; but in that region it has not 

 been found to contain lignite in commercial quantity. The prob- 

 ability is that they will prove equally unprofitable here. Judging 

 by such explorations as have been made, thej' are best developed 

 in the Farias and the Camanche pastures in blocks 9 and 11. 



