MOOK, STUDY OF THE MORRISON FORMATION 



105 



Feet 



Black shale. 40 



Light gray shale 36 



110 



Fig. 68. — Section of the Morrison forma- 

 tion near head of Burnt Hollow, i miles 

 northwest of Hulett, Wyoming. 



Scale, 125 feet to 1 inch. (Darton after 

 O'Harra.) 



Fig. 69. — Section of the Morrison forma- 

 tion a short distance east of the fore- 

 going section. (Fig. 68.) 



Scale, 12.5 feet to 1 inch. (Darton after 

 O'Harra.) 



Section of Morrison Formation on north side of Moores Canyon, ly^, Miles 

 northwest of Hulett, Wyoming 



Feet 



Grayish-purple shale 20 



Dark purple shale .30 



Yellowish, slightly sandy shale 4 



Nodular layer 1 



Dark greenish-gray shale 10 



Nodular layer 1 



Purple shale 6 



Dark gray shale with lime-clay nodules 2 



Drab shale 8 



Very soft sandy shale , 8 



96 



Section of Morrison Formation 2^^ Miles west of Belle Fourche River 



Feet 



Purple, gray and yellowish shale with one or two thin sandstones 60 



Flaggy to massive white sandstones 4 



Purple and green shale with a few limestone nodules 60 



124 



Section of Morrison Formation 3 Miles south of Rapid Gap, South Dakota 



Feet 



Concealed to base of Lakota sandstone 20 



Mostly green shale, partly concealed 40 



Dark green shale, weathering into small fragments 6 



Massive gray sandstone 5 



