MOOK, STUDY OF THE MORRISON FORMATION 



107 



Feet 



Green clay 6 



Soft yellow sandstone 2 



Oreen clay 7 



Soft yellow sandstone 2 



144 



:^ — '-X-^r^ ^-■i.-E 



Fig. 72. — Section of the Morrison forma- 

 tion 3 miles south of Rapid Oap, South 

 •Dakota. 



Scale, 125 feet to 1 inch. (Darton after 

 O'Harra.) 



Fig. 73. — Section of the Morrison forma- 

 tion on the Bellefourche River, Wyo- 

 ming. 



Scale, 125 feet to 1 inch. (Loomis.) 



Section on Inyan Kara Creek 



Feet 



Olive green clay 4Q 



Light green clay 12 



Maroon clay with small concretions 10 



Green clay with small concretions , . 5 



Red clay 5 



Green clay .5 



Maroon clay 6 



Green clay 20 



Limestone concretions 1 



Yellow sandstone 9 



Dense gray sandstone 8 



Yellow sandstone 5 



Limestone concretions 1 



Yellow sandstone 12 



139 

 Section at Sheldon Post Office 



Feet 



Olive green clay 30 



Limestone concretions 1 



Green clay 10 



Maroon clay 5 



Yellow-green clay 9 



Red clay 5 



Limestone concretions 



