LETTER OF TRANSMITTAL 



Department of the [ntebior, 



United States Geological Survey, 



Washington, />. C, January 22, 1896. 

 Sir: I have the honor to transmil herewith the manuscripj of a report 

 upon the geology of the Denver Basin of Colorado. 



Although this work was undertaken a1 my suggestion and has been 

 conducted under my supervision and <liivcti.ni, the actual field work has 

 been carried on chiefly by Messrs Whitman Cross and George II. Eldridge, 

 by whom, as will be seen, the greater pari of the manuscript has been 

 written. 



Various causes have combined to delay the publication of this material, 

 among which was the desire to obtain further light on certain important 

 paleontological points. You have wisely decided that this publication Bhould 

 be delayed no longer. 



Very respectfully, your obedient servant, 



S. F. Emmons, Geologist. 

 Hon. Charles I). Walcott, 



Director United States Geological Survey. 



xvii 

 MON \"\\ II ii 



