EXPLANATION OF PLATE 26 



Geologic map of a portion of the Santa Ana Mountains, California, a part 

 of the Corona Quadrangle. Adapted from the U. S. Geological Survey topo- 

 graphic map. 



Qual, Alluvium and Pleistocene terrace deposits; Tv, Tertiary Miocene; Ttj, 

 Tertiary, Tejon Eocene; Tmz, Tertiary, Martinez Eocene; Kc, Cretaceous Chico; 

 BC, Basement Complex. 



Scale, J inch = 1 mile. 



[272] 



