,2C 

 ).8 



University of California Publications in Geological Sciences 



Editors (Berkeley): Adolf Pabst, W. L. Fry, D. E. Savage, L. E. Weiss 



Volume 36, No. 8, pp. 369-390, 4 figures in text 



Submitted by editors December 8, 1959 



Issued November 17, 1960 



Price, 75tf 



University of California Press 



Berkeley and Los Angeles 



California 



Cambridge University Press 

 London, England 



PRINTED IN THE UNITED STATES OF AMERICA 



