254 C. SCHUCHERT MORRISOX AND TENDAGUllU FORMATIONS 



NORTHWESTERN SIDE OF FREEZEOUT HILLS, WYOMIXG 



Seen by Schuchert July 30, 1899. 



Feet 



Coinaiicliian. Cloverly conglomerate, heavy-bedded, up to 75 



111 1S90 correlated with Dakota sandstone. Knight then told me he had 

 collected liere a vertel)ra of a marine sanrian. 



Probable break in deposition. 

 Morrison formation. Mainly sandstones at this locality. Init from 4 to 5 

 miles east all has changed to green shales. 



Covered area. In places a sandy shale and in others sandstone. . 25 



Soft, buff, cross-bedded sandstones in thick beds. About 50 



Covered area. About 70 



Heavy-bedded sandstone. About 15 



Soft, white sandstone. About 25 



Total 185 



Break in sedimentation, 



Jurassic. Sundance f()rmation. Sandy shales, green 2 



(Jieen shale with calcareous concretions, some of which have 

 small bivalves. Main Bclemnites dcnsiis zone. Also OMtrra 



striffileciihi. About 30 



Soft. ])uff, sandy and shaly sandstones terminating in indurated 

 brown-stained beds. Has Belounifcs and, at the top, nuculoids, .'^O 



White, thin-bedded sandstones (i 



White, thick-bedded and irregularly layered sandstones 75 



Total 143 



Break in deposition. 

 Triassic, Ohugwater formation. Red and green sandy shales. 



EASTERN SIDE OF FREEZEOUT HILLS, WYOMING 



Xear Dyer's ranch house. See W. N. Logan, Kansas University Quar- 

 terh^, volume 9, 1900, pages 109-134. His section considerably altered by 

 Schuchert, from observations made September 11, 1899. 



Feet 

 Comanchian. Cloverly formation. Originally correlated with the Dakota 

 formation. 



Thin-bedded sandstone (top not seen; total thickness elsewhere 



about 75 feet) 10 



Blue shale, hard 22 



Heavy-bedded, coarse sandstone and conglomerate 10 



Total seen 42 



Probable break in deposition. 

 Morrison formation. .Jointed clay, greenish, with an occasional sandstone 



layer. Has sauropods, Stegosaurus, and Allosaurus 70 



Arenaceous limestone, bluish to brown. Unio knighti, U. willis- 

 toni, U. haileyi, Yalvata leei, and Planorhis vetermis 1 



