MOOK, STUDY OF THE MORRISON FORMATION 



55 



Marine fossils of Washita age have been found by Stanton (1905, 11) 

 near Canon City in beds immediately overlying the Morrison formation. 

 This limits the age of the Morrison deposits near Canon City to a certain 

 extent. This question will be taken up again in the section on the age 

 of the Morrison. 



The general features in the Canon City area which are especially 

 worthy of notice are the prevalence of variegated joint-clays in the upper 



1 



1A.-^-_'l_»l m '.je^S 





Pig. 13. — Section of the Morrison and re- 

 lated formations at Garden Park, near 

 Canon City, Colorado. 



1. — ^Purgatoire ; 2. — Morrison ; 3. — Cal- 

 careous arkosic sandstone, probably the 

 basal member of the Morrison, but may 

 belong to the Red Bed series. Scale, 125 

 feet to 1 inch. (Section by the writer.) 



« « O A « o 



Fig. 14. — Uirper part of the Garden Park 

 section. (Fig. 11.) 



1. — Purgatoire ; 2. — Morrison. Scale, 12% 

 feet to .1 inch. 



portion of the formation; the relatively larger amount of limestone, lime 

 concretions and sandstone in the lower portion; the distribution of the 

 dinosaur remains throughout nearly the whole thickness of the formation, 

 though these remains appear to occur in definite levels ; the sharp contacts 

 of the sandstones and clays in the formation; the relatively small thick- 

 ness of the individual sandstone members in most cases; and the lense- 

 shaped cross-section of one of the principal sandstones. 



