26 MALONE JURASSIC FORMATION OF TEXAS. [bull. 26G. 
Feet. 
22. Limestone with fragmentary fossils (Ammonites, etc.) 10 
23. Calcareous conglomerate 15 
24. Covered 100 
25. Limestone with Gryphsea, Pinna, Trigonia, etc 15 
2G. Covered in tains slope 150 
27. Thin-bedded brown sandstone with bands of conglomerate and con- 
taining a small Ostrea, Nerinea, and a few other fossils, poorly 
1 a-eserved 25 
28. Massive, gray, calcareous sandstone 10 
29. Gray limestone forming a prominent ridge ±250 
30. Brown conglomerate, composed mostly of quartzite and chert pebbles 40 
31. Blue limestone 100 I 
This is uncomformably overlain by the unconsolidated Tertiary or 
Pleistocene conglomerates of the plains on the wes.t. 
Tin 1 main ridge of Ma lone Mountain on the line of this section 
seems to In; made tip of Nos. 29, 30, and 2)1. with perhaps some higher 
beds, all repeated by the synclinal fold. 
Xos. 12) and 25 each yielded fossils, some of which are specifically 
identical with forms occurring at Professor Cragin's principal 
locality for the Malone Jurassic fauna, and the fossils mentioned 
in other bands (Xos, 9, L9, 22. and 27) evidently belong to the same 
fauna. 
Some bands in the limestone No. 2D yielded a few fossils that i 
seem to be fresh-water forms — small, simple gasteropods, resembling 
Viviparity Similar forms were seen in No. 2,1 also. 
Near the south cud of Maloue Mountain the same horizon in ] 
No. 29 yielded some -mall bivalves with the external features of Uniol 
associated with the gasteropods. Conglomerate No. 30 of the section, 1 
however, contains marine fossils, including Ammonites, Exogyra, 
and several other genera. These were not found on the line of the J 
section above described, but the conglomerate is a prominent, easily 
recognized horizon exposed at many points along the entire length of 
the mountain, and the fossils, usually in the form of imprints and 
fragments, were seen at several places both north and south of the sec- 
tion, especially toward the southern end of the mountain. In the 
western foothills of the mountain. 1 to 2 miles north of the southern 
end. there are exposures of a conglomerate believed to be the same as 
Xo. 30, and in the uppermost bands of the limestone immediately 
beneath it collections were obtained containing Exogyra, Pinna, 
Pecten, Pleuromya, Perisphinctes, etc. which Professor Cragin has 
assigned to the Malone fauna (see p. ID). 
At the end of the northwest spur of Malone Mountain, at the point 
where it approaches the railroad, there are large exposures of gypsu] 
that almost certainly belong to the gypsiferous horizons in the sec- 
tion just described, though they are separated from them by struc- 
