U. S. GEOLOGICAL SURVEY 
BULLETIN NO. 322 PL. VIII 
A. ALCATRAZ ASPHALT MINE, 3 MILES EAST OF SISQUOC. 
Showing the horizontal Fernando brea deposits overlying the steeply tilted Monterey shale. 
B. UNCONFORMITY BETWEEN TILTED MONTEREY SHALE AND HORIZONTAL PLEISTOCENE 
SAND AND GRAVEL. 
In railroad cut northeast of Casmalia. Photograph by Ralph Arnold. 
