208 RL. T. Hull—Outlying Areas of the Comanche 
Ft. Ins. 
2. Blue-black sandy clay shale with limonitic 
seams. This begins rather abruptly above 
the sandstone, but its sandy nature indicates 
that it is a transition and not an unconform- 
ity, which is further attested by the occur- 
rence upward in these shales of bands of sand 
similar and identical in material with the 
lower sandstone. The shale contains crystals 
of selenite and dicotyledonous leaf impres- 
SIONS ©2.0.00 0000 2 eee ee 10 
3. The shale No. 2 in its upper part grades by 
gradual transition into a bed of sand which 
superficially indurates into a hard series of 
layers aggregating four feet in thickness. In 
these sandstones and shales (No. 2) immedi- 
ately below it were found the dicotyledons to 
be mentioned later::_bau0 a) ho eee 4 
Id. The Belvidere Shales. 
4,* A persistent stratum of small Grypheate oys- 
ters superficially resembling the Comanche 
Peak variety of G. pitchert. A closer study 
shows it to be a small form Gryphea 
pitchert Morton (G. dilatata, var. tucumcari 
Marcou) imbedded in a sandy shaly matrix 
not exceeding... ca, - oe oe eee 1k 2-6 
5. A thin white shaly sandstone with plant and 
molluscan remains) 22-02 27 253. 3 
6. Thin black sleek paper shale with impressions 
of mollusea im its lower part 22222. eee 159256 
7. Indurated bed in the shale with occasional 
minute-pebbles: = Se. ee. ee 
8. Shale like No: 62222 eee 2.21? oe 4 
9.. Sandy induration in shale 22) 122 ae 2 
10. Shale J. 220). SE ee eee 5 
1. Indurated shale with Gryphzas -_.----2..... 1 
12.“'Black’shale_ >. -\)2 02s Dee ee Be eee 5 
13. Indurations with var. of Gryphea pitcher (G. 
roemert Marcou, G. forniculata White), 
Cyprimeria and "Turritella, alternating with 
shales fora thickness*of.42/22.22 22 . Sees 20: 4009 
14. Blue shale as above. | : 
15. Indurated beds with Hxogyra texana Roemer, 
Trigonia, sp. Cyprimeria, Turritella and Gry- 
pheas of large size. The upper horizon of 
15 containing vertebrates bones, Lingula, ete. 
Total‘of Nos. 15 and!i6)Ss 7 4etl 2 Gee 17 
* Above this oyster bed to the summit of the section, the formation consists 
mostly of blue papyraceous shales with occasional indurated bands and present- 
ing many fossiliferous horizons, all of which, however, are portions of the same 
continuous deposition and fauna. 
