96 



ANNALS NEW YORK ACADEMY OF SCIENCES 



Feet 



16. Dark shale beds with remains of Baptanodon, Belemnites, Os- 



trea, Tancrcdia, Camptonectes and a few Septaria 881/2 



17. Yellowish sandstone - /2 



18. Gray sandstone. 



51/2 



19. Yellowish sandstone alternating with thin clay bauds 6% 



20. Thin bedded gray sandstones with a few bands of clay 514 



Total [Shirley or Sundance] H^ 





Fig 57._sect(:ow of the Morrison forma- Fig. 58.Section of the Morrison forma- 

 tion at Sioux Fault, Wyoming. tion in the Freeseoui Hills, Wyoming. 

 1 —Morrison formation ; 2.— Sundance 1.— Morrison formation ; 2.— Sundance 

 formation. Scale, 125 feet to 1 inch. formation. Scale, 125 feet to 1 inch. 

 (Knight.) (Kni-ht.) 



Freezeout Hills Section 

 Cretaceous : 



1. Dakota conglomerate. 



Jurassic : ^®^* 



2. Drab marls and clays with a few thin bands of light colored 



sandstone containing remains of Dinosaurs 55 



3. Hard clay and sand containing fresh-water molluscs and croco- 



diles .'. 1^2 



4. Drab marls and clays with a few bands of calcareous sandstones 



with remains of Allosaurus, Diplodocus, Brontosaurus, Moro- 



saurus, Stegosaurus, Ceratodus and Turtles 241^ 



5. Drab marls and clays with thin beds of soft sandstone 46 



6. Yellowish soft sandstone with cycads and petrified wood 10 



7. Brown sandstone, cross-bedded 2 



8. Drab shales, clays and marls • ''^ 



9. Greenish sandstone * 



Total fresh-water beds [Morrison] 211 



