Bull. TJ. S. Geol. and Geogr. Survey, Vol. III. 



Plate 31. 



CRET. No.6. 



Duia.t(t/n-i((n leeOi 

 amlJlouei,: 



linnti/ Saiulfitoue, .vnnll nhells. 



Gvdi/ 3rarls and fl(ij/s with Uiiio 

 'bed iind tiro Liynltic Oe.ds with 

 Satirtans and Gars. 

 Sunditone. Dinosauriari 7io?ies. 



CRETi NOi(?), J Xlglil arenaceous Alkaline beds! 



CRET. No.5, 



Thin Sandstone —Alkaline 

 clays. JTaritie TeriaTirata 



Sandstone with marine 

 shells and I'ertlbrata 



Fig.3. 



SAURIAN 

 REIVIAINS. 



Jied of Ostrea Sitbtrigonatis.- 



UlacTc sliale and lignite. 



Shale. - _. 



Xiynite. 



lieddisTi Shale — . 



Jfurl. 



Sandstone.(lhird). 



I Are/iaceous marl ic 



ith 2)etri/ied wood 



Unsty sandstone (second) u-itJi 

 fre-ih water shells. 



Marine CreCuceou^ 

 verlebraU.1. 



Sandstone A'o .5.' 



Z'nioljed. 



Iminireliynite. 



Xmiiureliijnile. 



Sandstone (first) 

 Dinosauriun bones 



Arenaceous marl. 



Fig.4, 



SC7,/t. 



Plate 31. — Sections of Cretaceous Formations. 

 [N. B.— For "Vertabrata", and for "Vertiltrata", in Fis. 3, read "Vertebrata". For "Snbtrijronatis", 

 Fig. 4, read "subtrigoualis'. In Fig. 4, "Unio bod' should follow tbe preceding line witUout interval.] 



