vaughai.1 EOCENE FORMATIONS. 49 
Section (hroiH/h coal stain. 
Ft. in. 
12. Flaggy clay and sandstone 25 or 30 
11. Chocolate clays 6 
10. Coal lor2 
9. Chocolate clays 3 
8. Coal 2 
7. Chocolate clays 6 or 7 
6. Coarse sand 1 
5. Chocolate clay and sand 3 
4. Coal, weathered specimens firm but apparently not very pure; con- 
tains considerable sulphur 8 
3. Bone 3 
2. Chocolate clays 6 
1. Clays 20 
Total (about) 80 
Section of north end of bluff just below the McDaniel ranch, west side of Nueces River 
Feet 
3. Gravel 60 
2. Thinly laminated sandy clays and argillaceous sands, and a layer of ironstone; 
otherwise the beds are whitish 10 
1. Soft whitish sands, some clay 10 
Total 80 
Section of lower {southern) end of foregoing bluff. 
Feet. 
3. Gravel capping. 
L-2. Soft sands and clays, usually laminated, bluish white in color, with some- 
times a chocolate tinge 30 
1. Hard brownish-yellow or grayish sandstone 7 or 8 
Total 38 
The estimated total thickness exposed in the above-described sections 
s between 370 and -100 feet, giving a dip of about 100 feet to the mile 
io the southeast. Supposing this dip to be continuous to the southern 
)oundary of the quadrangle, there would be a thickness of about 700 
eet of Eocene sands and clays within the Uvalde quadrangle along the 
Hueces River. 
There are very few exposures along the Nueces River from the 
outhern margin of the Uvalde quadrangle, about 1 mile south of the 
'Old 7 D" (Bucklew ranch), to the crossing of the Carrizo Springs- 
Jatesville road over the river. The road is for almost the whole dis- 
mce on the wide silt flat adjoining the river. 
At the $ ranch the western bluff and bed of the river are formed of 
reenish clays, with occasional carbonaceous seams. These clays make 
i extremely sticky mud, as the writer learned from the sad experience 
I having the camp wagon bog in it. 
Five miles above S 7 ranch and about 7 miles above the crossing of 
te Carrizo Springs-Batesville road over the river, in a washout leading 
Bull. 164 1 
