38 THE PERMO-CARBONIFEROUS RED BEDS OF 



Section 2Q. — In the west side of the road running north and south along 

 the east side of B. S. & F. survey, i mile west of vSchool No. 9, and 

 about 9 miles north and 2 miles west of Iowa Park, there is a thin 

 shell of light gray limestone overlying some gray shale (Udden). This 

 limestone contains unrecognizable organic fragments throughout, and 

 a small coral and a fish-scale were noted. It changes into a sandy 

 calcareous rock in a short distance to the northeast. A thousand 

 feet to the northeast from this place there is an exposure in the east 

 bank of the creek, which probably lies 20 or 30 feet below the above 

 limestone. In this exposure is seen a typical instance of contempora- 

 neous erosion in the Wichita formation. A thin gravel of washed con- 

 cretions lies on a contemporaneously eroded bed of red shale, and over 

 this, 0.5 foot of shale and then 3 feet of sand, with another streak of 

 soft conglomerate. (See fig. 6, p. 39.) 



Section JO. — In the south end of the T. E. & L. Co. survey abutting on 

 Red River, about q}^ miles west of School No. 9 and 9 miles west of 

 Burkbumett. A section appearing in the right bank of Calvary Creek 

 is as follows (Udden) : ^^^^ 



6. Sandstone and concretion conglomerate I 



5. Ashen gray and red shale 5 



4. Streaks of sand and concretionary conglomerate 2 



3. Ashen gray and red shale 10 



2. Streaks of shale, with indistinct remains of vegetation i 



1. Gray shale, with streaks of sand and concretionary conglomerate . . 2 



21 



Section ji. — Near the north boundary of the C. T. R. R. Co. survey 

 abutting on Wichita River, about 6 miles west and 1.25 miles south 

 of the railroad station at Iowa Park, there is an eroded bluff showing 

 the following section (Udden) : 



4. White sandstone, in part cross-bedded 4 



3. Red clay with many concretions and here and there some sandy streaks. ... 15 



2. Red sandstone, with cross-bedded structure; terminates somewhat abruptly 



when followed westward 10 



I. Red shale with white streaks, and with some thin layers of a conglomerate 



consisting of worn concretions, evidently assorted 15 



44 



The lower sandstone, or a sandstone having the same level in the red 

 shale, runs south in a low escarpment for almost a mile, and is again well 

 exposed in some bluffs just south of the main wagon road. At this point 

 it was seen to contain an impression of a fern leaf, like Pecopteris tenuinervis 

 F. and W. 



Section J2. — In block 314 of the Waggoner Colony survey, about 7.5 miles 

 north and 4 miles east of Electra, in the right bank of China Creek, 

 is an exposure of red clay and sandstone, which shows unconformities 

 in bedding (Udden). Farthest east is a bank of red clay, some 30 

 feet high, and this is capped for most of its length by several feet of 

 sandstone. At its eastern edge this sandstone terminates against a 

 rising slope of the clay, like the bank of an old channel. At the west 

 end of the exposure two rising sandy layers have been cut ofT in the 

 excavation of a contemporaneous channel, or hollow, which later has 

 been filled with sand. (See fig. 7, p. 39.) 



