114 



D. E. SAVAGE 



BARSTOVIAN MAMMALS 

 IN THECALIENTE FORMATION 



RED BEDS 



GRAY BEDS 



■ ! .!<.., .M« > ? .. ^ . a .. ^ , T . ,w, ., , .) 



Fig. 6. Census of land mammal adaptive types in the late Miocene 

 Caliente formation of southwestern California, showing approximate 

 abundance of each type on a percentage bar graph for the red-bed facies 

 and the gray-bed facies respectively. 



to probable temperate-mesic to xeric climatic conditions, depending 

 upon local topography (Axelrod, 1940, 1950; Dibblee, 1952 ; Durham, 

 1950; Schwade, 1954). But this comparison between the paleobio- 

 cenoses across western North America provides only tentative con- 

 clusions because: 



1 . The compared faunas are dissimilar taxonomlcally. 



2. There was a profound climatic and vegetative difference be- 

 tween the two areas. 



