470 



STUDIES FOR STUDENTS 



of a heavy, gritty series at the base The middle members 



are of finer material and are more intercalated with clays, .... 

 while the upper part of the series .... is made up of striped 

 and banded sandstones varying from gray to yellow, white and 

 red, with prevailing red and white tints" (p. 375). 



h/[/\p of the Eocene beposirs °f the WesTci^N UNireb Sr/tres. 



Comfitei B r James H.Smith. 



'j rvV t *.. r *v.illUI3 



IV L/PPfzK. VNot CovPst 



Enough has been said, perhaps, to show that no single 

 explanation will account for the deposition of all the so-called 

 lake beds. At present it seems probable that the deposits will 

 be found to be in part lacustrine, in part fluviatile, and possibly 

 in part eolian. The origin of these deposits cannot be solved by 



