/ si 



DEPARTMENT OF THE INTERIOR 



Franklin K. Lane, Secretary 



UNITED STATES GEOLOGICAL SURVEY 



George Otis Smith, Director 



Professional Paper 98— F 



THE PHYSICAL CONDITIONS INDICATED BY THE 

 FLORA OF THE CALVERT FORMATION 



BT 



EDWARD WILBER BERRY 



Published Ma; 27, 1916 



Shorter contributions to general geology, 1916 



(Pages 61-73) 



WASHINGTON 



GOVERNMENT PKINTING OFFICE 



1916 



