50 RIO GRANDE COAL FIELDS OF TEXAS. [bull. 164. 
down to the river, is an exposure of yellow gypseous clays about 
20 feet in thickness. Two or 3 feet below the top of this exposure 
are nodules which upon chemical examination were found to contain 
small quantities of lime phosphate. 
RECONNAISSANCE FROM UVALDE TO CARRIZO SPRINGS, AND FROM CARRIZO SPRINGS TO 
SANTO TOMAS. 
Twelve and three-fourths miles south of Uvalde, on the road to 
Batesville, crystalline sands, which in all of their characters resemble 
the Carrizo sandstone, are exposed. Sands of this type mixed with 
gravel were seen about 7i miles south of Uvalde, but no exposures of 
the sands themselves were observed. Around Loma Vista there are 
exposures of red, angular or crystalline sands. One and a half miles 
east of north of Loma Vista, in the sandstone hills around Pond's 
house, some poorly preserved Eocene fossils were found firmly em- 
bedded in the sandstone. One species is Comulina armigera (Conrad). 
This species occurs above the Midwayan, and from it and the facies of 
some of the other fossils it would seem that the horizon of Loma Vista 
is Claibornian, the "Lower Claiborne" of Harris. 
With the above exception, from Batesville to Loma Vista and from 
the later place to the crossing over the Nueces River on the way to 
Carrizo Springs, few or no undoubted exposures below the surncial 
gravel or creek and river terraces were seen. 
At the crossing over the Nueces River there is an exposure, 25 or 30 
feet in thickness, of laminated sands and clays, with a seam of poor 
lignite. Limonitic concretions are abundant. 
At Carrizo Springs there are numerous flowing artesian wells, but no s 
very accurate records of the borings were obtainable. The wells vary 
in depth from 60 to 330 feet. (PI. IV, B.) 
Mr. J. W. Campbell, of Carrizo Springs, furnished the following 
notes on a well that he had bored 3 miles north of the town. 
Section of well 3 miles north of Carrizo Springs. 
Feet. 
Sandstone 30 or 40 
Hard pan and clay (about) 260 
Very coarse white sand rock to bottom of the well 6 or 16 
The well was not quite completed when the writer was at Carrizo 
Springs in 1898. It had been bored to a depth of 306 feet, and an 
abundant and excellent flow of water had been obtained in the coarse 
white sandstone at the bottom of the bore. Judge George C. Herman, 
of Batesville, subsequently stated that the boring extended to 380 feet. 
Mr. G. G. Cavender furnishes the following record of a well bored 
on the S. Gobbett survey, eastern bank of the Nueces River, 15 miles 
from Carrizo Springs: 
