57° 



WARREN S. SMITH 



of orogenic pressure, and this change may account for the trans- 

 verse warping of the surface of the peneplane which is noted else- 

 where. The importance of the development of these structural 

 relations has an important influence on ore deposition (Fig. 2). 



Fig. 2. — Kimball Creek. Note jointing. Rock: granodiorite 



REPORT ON THE FLORA OF THE SWAUK SERIES 



The flora of the beds is of Fort Union age. The material 

 examined yields fifteen genera and nineteen species, of which two 

 are new; the other seventeen species have been recorded from 



