SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 103 



CONTRIBUTIONS TO THE GEOLOGY AND PALEON- 

 TOLOGY OF THE CANAL ZONE, PANAMA, AND 

 GEOLOGICALLY RELATED AREAS IN CEN- 

 TRAL AMERICA AND THE WEST INDIES 



THE SEDIMENTARY FORMATIONS OF 



THE PANAMA CANAL ZONE, WITH 



SPECIAL REFERENCE TO THE STRAT- 



IGRAPHIC RELATIONS OF THE 



FOSSILIFEROUS BEDS 



By DONALD FRANCIS MacDONALD 



Formerly Geologist of the Canal Commission 



Extract from Bulletin 103, pages 525-545, with Plates 153-154 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1919 



