mLLISTON— 

 BASIN 



TERTIARY 

 VOLCANIC ROCKS 



«S 



TERTIARY 

 INTRUSIVES 



EARLY TERTIARY 

 BASIN SEDIMENTS 



PALEOZOIO AND 

 MESOZOIC SEDIMENT- 

 ARY ROCKS 



."i'-".".-»/J 



PRECAMBRIAN 

 ROCKS 



Fig. 24.1. Index map of Wyoming. Certain small Tertiary basins not shown. 



