UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGICAL SCIENCES 



Vol. 13, No. 5, pp. 133-174, plates 1-8 May 10, 1922 



THE BRIONES FORMATION OF 

 MIDDLE CALIFORNIA 



BY 



PARKER D. TRASK 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY, CALIFORNIA 

 1922 



