DEPARTMENT OF THE INTERIOR 



Franklin K. Lane, Secretary 



UNITED States Geological survey 



George Otis Smith, Director 



Professional Paper 98 — E 



THE PHYSICAL CONDITIONS AND AGE INDICATED BY 

 THE FLORA OF THE ALUM BLUFF FORMATION 



BY 



EDWARD WILBER BERRY 



PubUshed May 27, 1916 



Shorter contributions to general geology, 1916 



( Pages 4 1-59 ) 



LIBRARY 



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BOTANICAL 

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WASHINGTON 



GOVERNMENT PRINTING OFFICE 



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