258 J. p. SMITH — AGE OF THE AURIFEROUS SLATES. 



The uplift and nietamorphism of the Sierra Nevada and of the Coast 

 range occurred in late Jurassic time, before the deposition of the Creta- 

 ceous. 



Neuniayr's theory of climatic zones cannot be applied with exactness 

 to the Jura of California, which can be understood only b}^ the study of 

 the geographic provinces of that time. 



Stanford University, California. 



