104 



ANNALS NEW YORK ACADEMY OF SCIENCES 



Feet 



Purple shale 10 



Concealed 8 



Purplish-gray shale 12 



Dark purplish shale 20 



"Very dark shale 14 



Gray shale 17 



Concealed ; contains some sand 24 



Green and purple sluile 6 



Sandy shale 4 



White sandstone, weathering to a dirty velvety brown 1 



Grayish-white shale 5 



Green shale 2 



Fissile purple shale 6 



Grayish-green shale with some lime nodules 16 





Fig. 66. — Section of the Morrison forma- 

 tion 4 miles east-son theast of Devil's 

 Tower, Wyoming. 



Scale, 125 feet to 1 inch. (Darton after 

 O'Harra.) 



155 



Fig. 67. — Section of the Morrison format 

 tion on north side of Deer Greek, 10 

 miles northeast of Hulett, Wyoming. 



Scale, 125 feet to 1 inch. (Darton after 

 O'Harra.) 



Section of Morrison Formation near head of Burnt Hollow, 4 Miles northwest 



of Hulett, Wyoming 



Feet 

 Very black shale, resembling a coal outcrop on weathered surface; may 



possibly represent the horizon of the Aladdin coal 10 



Gray shale 32 



Sandstone 1 



Shale with poorly preserved plant impressions 3 



Interbedded shales and thin sandstones 18 



64 



Section of Morrisoyi Formation a short Distance east of the foregoing Section 



Feet 



Very black shale, as in above section 10 



Brownish-gray and purple shale 14 



Sandstone 2 



Brownish-red shale 8 



