22 RIO GRANDE COAL FIELDS OF TEXAS. [bull. 164. 
found the teeth and bones of a saurian in the concretions. The materials overlying 
this become more clayey, as will be seen by the following section made some 10 miles 
north of Eagle Pass: 
Section near Eagle Pass. 
Feet. 
Sand and silt 8 
Sandstone _ 2 
Clays, displaying cone-in-cone structure 6 
Sandstone, with laminae and nodules of calcite 1 
Clay, to base 8 
Above this there are sands, with lime and greensand, containing many casts of 
fossils — Inoceramus and other bivalves, together with numerous gastropods. This 
continues to a point about 8 miles north of Eagle Pass, below which these strata are 
soon covered by the next newer series of deposits. l 
Coming up from the creek valley, about halfway between the ranches 
of Messrs. Lehmann and Burr, li miles north of Paloma siding, on 
the Southern Pacific Railroad, one finds sandstone, underlain by clay, 
exposed in the eastern bluff. The section is similar to that next de- 
scribed, which is seen in coming up from the Rio Grande flat, on the 
way from the Lehmann ranch to Eagle Pass. 
• Twelve and a half miles from Eagle Pass, as the road from Upson 
passes from the silt terrace of the Rio Grande to the plain above the 
breaks of the river, the following section was observed: 
Section 12 1-2 miles from Eagle Pass. 
Feed 
3. Sand and gravel (Uvalde formation) . 
2. Soft yellow, grayish, or white calcareous sandstone 40' 
1. Yellow clay. 
Fossils obtained from No. 2. 
Ostrea tecticosta Gabb. 
Exogyra costata Say?, upper valve only. 
Pecten quinquenarius Conrad. 
Cuculkea antrosa Morton. 
Crassatella sp. 
Cardium carolinense Conrad. 
Cardium (Pachy cardium) spillmani Conrad. 
Legumen planulatum Conrad. 
Turritella trilira Conrad. 
Anchura rostrata Gabb. 
tc The above species all occur in the typical Ripley fauna of Missis- 
sippi and Alabama. The horizon is about the same as that of the lower; 
marl bed (Navesink formation) of New Jersey." (Stanton.) 
Coal series. — This name has been utilized by Dumble (op. cit.) to 
designate that portion of the Eagle Pass formation which contains the 
coal beds in the vicinity of Eagle Pass. The following sections will 
'uve an idea of the character of the beds. 
i Dumble, Bull. Geol. Soc. America, Vol. Ill, 1892, pp. 224, 225. 
