ART. 22 TERTIARY FOSSIL PL.\NTS FROM ARGENTINA BERRY 5 



the three plant localities in the Lago Nahuel Huapi refrion are older 

 than the Patagonian marine beds. This coincides with my former 

 and present conclusions based upon a study of all available evidence, 

 although, as has been frequently pointed out, this evidence is far 

 from complete. 



In former contributions^ I have considered Dusen's Fagus zone 

 to be upper Eocene or lower Oligocene, since it occurs below the 

 marine Magellanian, and his Araucaria zone to be upper Oligocene, 

 since it occurs above the Magellanian and below the Patagonian.'^ 

 The second might be lower Miocene, but since its flora is so unlike the 

 lower Miocene floras of Chile I have thought it to be older. 



Table of distribution 



If the Araucaria and Fagus zones of Dusen have any stratigraphic 

 validity, then the florule from the Lago Nahuel Huapi region is to 

 be correlated with these zones, since as the accompanying table of 



^ In First Fan Pacific Congress Proc, pt. 3, pp. 845-865, 1921. 

 8 According to the sections given by Hatcher and Nordenskiold. 



