98 THE UNIVERSITY OF OKLAHOMA 



Sandstone, blush white, shaly 3 



Sand''tone. bluish white, with red shale 2 



Wegemann does not seem to have recognized the phosphatic na- 

 ture of some of the nodules in this vicinity mistaking them, natur- 

 ally enough, for limiestone nodules of almost identical appearance in 

 other portions of his area. 



The phosphate occurs in the 32ft. shale bed in the above sec- 



C^^ ^"^^^^^^^■^^7^^^^ ■; 



Fig. 2. . Phosirhate Nodule. Natural Size, NE. of SE14 

 Sec. 33, T. 4 S., R. W., Cotton Co., Oklahoma. 1 mi. north of 

 extreme southwest corner of Cotton County. A. C. Shead. 



tion which lies in the west facing bluff of the hill on which a 

 . Mr. Silkwoods' house now stands. The deposit is just west of 

 the Cotton-Jefferson county line in Cotton county about a mile 

 north of Red river and the extreme southeastern corner of Cotton 

 county. It is one-half mi'e north of the main Burkburnett Texas 

 to Waurika, Oklahoma road eight miles west of Waurika and two 

 miles east of Wallings' or Wilson's store. 



The rock is in the form of heavy, dark red or maroon colored 

 nodules, many of which show in some places a "turkey fat" or but- 

 ter colored surface and in other portions metallic black fluted or 

 slickensided areas that are probably highly manganiferous. As a 

 rule, the surface is smooth and convoluted somewhat like the sur- 

 face &f a brain. Sometim.es the convolutions are almost absent. 

 The fragments of the nodules break sharply and smoothly with 

 mostly plane surfaces and sharp edges and corners. They generally 

 show pockets and veins of white or cream colored powdery ma- 



