Stanton.] THE CRETACEOUS. 31 
Feet. 
4. Massive limestone, probably same as No. 2 30 
5. Argillaceous limestone with some bands of clay and sandstone; fos- 
sils: Nodosaria texana, Enallaster texanus, Neithea texana, Exo- 
gyra arietina, K. draJcei var., Plicatula incongrua, and other Wash- 
ita forms 1 300 
('). Heavy-bedded limestone (40 feet) forming a cliff, followed by argil- 
laceous nodular limestone (30 feet), winch yielded Enallaster tet- 
anus, Oryphwa corrugata, Lima wacoensis, Veithea texana, and 
Schlcenbachia vespertina 70 
7. Similar limestones with dip not less than 45° westward 300 
8. More argillaceous light-gray limestone, interstratiiied witb dark clay 
shales; one of the limestone bands yielded Epiaster whitei, Tere- 
bratula (Kingena) wacoensis, GrypKaza washitaensis (?), Plicatula 
incongrua, and Schlwnbachia vespertina, and another band farther 
west yielded Epiaster whitei, Schlcenbachia acutocarinata, 8. serra- 
tescens, and Hamites fremonti 300 
9. Dark clays with brownish calcareous bands: Exogyra texana abun- 
dant 50 
10. Covered .__ 100 
11. Limestone, very heavy-bedded above, with increasing bands of argil- 
laceous limestone below; Requienia and a small conical Forami- 
nifera abundant; Exogyra tcrana also occurs 300 
12. Shales, limestones, and bands of brown sandstone, not well exposed-- 2.10 
13. Argillaceous limestone, with some harder bands containing " Caprina " 
and Requenia 75 
14. Generally more massive limestone with some bands of brown sand- 
stone. Also contains "Caprina," Ostrea, etc , 350 
15. Quartzitic sandstone with thinner bands ol* clay shale and impure 
limestone, dipping steeply westward 400 
10. Hard, blue limestone, full of Orbitolina tcrana 60 
17. Sandstone and impure limestone with some clay 40 
18. Sandstones and clays 250 
19. Thin-bedded passing into massive limestone, full of Orbitolina texana; 
at least 300 
The steep western surface of No. 19 forms the eastern wall of the 
canyon of the Kio Grande at this point. 
So far there has been no apparent serious break in the section, but 
the beds now become complexly faulted and folded. A short dis- 
tance north No. 19 is cut off by a fault, and on the west, across the 
river, the same bed seems to be repeated in several postures. 
It is evident that the eastern portion of the section crosses a syn- 
cline, so that in passing from No. 1 to No. 5 the same beds are all 
crossed twice. In the rest of the section, while there may be some 
repetition of beds due to small faults, there are no anticlines nor 
synclines, and the fossils show that in general the beds are suc- 
cessively older toward the west. No. 3 is Upper Cretaceous, of the 
age of the Fort Benton; Nos. 4 to 8 are Washita; Nos. 9 to 11, and 
probably 15, are Fredericksburg; and Nos. 16 to 19 belong to the 
Trinity. As the dips are all steep to the west it follows that all the 
