BULL. GEOL. SOC. AM. 



VOL. 19, 1907, PL. 23 



BISHORN OWLCREEK WIND RIVER RATTLESNAKE PLATTE LARAMIE; E.SIDE f<( 

 MTNS. UPLIFT MTNS MTNS. WALLEY BASIN LARAMIE MTS. S-S 



Montana . 



uijper diviaion 



Montana 

 lower division 

 (Pierre sKale) 



Chug! 



jaler 



ETmbar 



Tensleep 



Amsden 



Madison 



Bighorn 

 Dead wood 



Graivitcgric'ss e^c. 





C I ove r I y 

 Morrison 



Sundance 



COLUMNAR SECTIONS OF CENTRAL WYOMING 



N, Niobrara; M, JMowry beds; G, Greenlioni limestone; F, Forelle limestone ou Satauka 

 shale ; C, Casper formation ; XX, C.vpsum ; P, Parliman sandstone 



