V 



480 H. W. SHIMER PERMO-TRIASSIC OF NORTHWESTERN ARIZONA 



Cf. Bakewellia parva M, & W. r 



Pseudomonotis f sp. r 



Cf. Chiton Garl)onarius Stevens R 



Cf. Strophostylus nanus (M. & W.) c 



Strophostyliis sp. R 



Turritella ? sp. (small) c 



2. Red arenaceous shales and sandstones. 



3. Limestone largely silicified. ^ 



h. TOROWEAP VALLEY 



Traveling northwestward to southern Utah, and then toward the south- 

 west to Pipe Spring, our next encounter with Moenkopi fossil-bearing 

 strata was some 15 miles southwest of Pipe Spring, at AVild Band Pockets. 

 From here southwestward to the Toroweap Valley fossils were collected 

 from several sections. We will list the sections from the Toroweap Valley 

 northeasterly. This progression from south to north, through the gentle 

 northward dip of the strata makes the northern sections expose cor- 

 respondingty higher beds than the southernmost. The following section 

 was taken near the middle of the Toroweap Valley. In the very limited 

 time at our disposal while at this section it was impossible to do more 

 than estimate the thicknesses of the various beds. 



Feet 



1. Yellowisli arenaceous limestone 10± 



Apparently from this limestone, exposed farther up the valley, was 

 collected Leda odesa (White) R. 



A thin limestone slab upon the talus, which appeared to have come 

 from rocks a short distance above this locality, contained numerous 

 specimens of Bakewellia parva M. & H. The character of rock and 

 fossils appears to correlate this with the Wild Band Pockets exposure. 



Feet 



2. Reddish shale alternating with white and gray thin-bedded gypsum. . 25± 



3. Gray limestone 10± 



4. Alternating red shale and white gypsum 60± 



5. Massive gray limestone containing many siliceous concretions and 



many fossils 27.5±: 



The following fossils were obtained here : 



Productus ivesi Newberry c 



P. occidentalis Newberry c 



Cf. Pustula nehrashcnsis (Owen) r 



Squamularia perplexa (McChesney) r 



Feet 



6. Alternating thin, reddish brown shale and gray gypsum 200± 



7. Gray thin-bedded fossiliferous limestone 160zt 



