BULL. OEOL. SOO. AM. 



TEXAS 



DENISON 



VOL. 33, 1921, PL. 4 



CENTRAL WYOMING 

 LANDER 



NEW MEXICO 

 CASASALAZAR 



4 

 N.E. NEBRASKA 

 ELK POINT QUAD. 



6 



5 NEW MEXICO 



EW MEXICO CANYON LAR60 

 TUCUMCARI 



Dakota 

 Purgatoire 



Dakota 



Purgatoire 



Morrison? 



14 



WYOMING 

 13 BIS HORN MTNS. 



E. WYOMING SOAPCR. 



BLACK HILLS, NEWCASTLE 



Mowry 



Thernfopolis 



Graneros ^s 



Mowry 



Dal^pJa- ■ 

 Tuson 



15 



MONTANA 



":;.-y:\ Eagle 



Mowry 

 Thenpopolis 



Cloverly 



Morrison 

 Sundance 



Mosty 



Mowry 

 Thermopoli9 



COLUMNAR SECTIONS OF DAKOTA AND ASSOCIATED FOBMATIONS 



